Mathematical Multiple Choice Questions on Design and Development of
Advanced Military Aircraft
1. An advanced fighter jet has a wing area of 50 m² and a coefficient of lift of 1.2. If the air density is
1.225 kg/m³ and the aircraft is flying at 300 m/s, what is the lift force generated?
a) 325,000 N
b) 330,750 N
c) 335,500 N
d) 340,250 N
Answer: b) 330,750 N
Solution:
L = 0.5 * ρ * v² * CL * S
L = 0.5 * 1.225 * 300² * 1.2 * 50
L = 330,750 N
2. A military transport aircraft has an empty weight of 80,000 kg and a maximum takeoff weight of
120,000 kg. What percentage of its maximum takeoff weight can be attributed to payload and fuel?
a) 25%
b) 33.33%
c) 40%
d) 50%
Answer: b) 33.33%
Solution:
Payload and fuel weight = 120,000 - 80,000 = 40,000 kg
Percentage = (40,000 / 120,000) * 100 = 33.33%
3. An unmanned aerial vehicle (UAV) needs to survey a rectangular area of 100 km by 150 km. If the
UAV flies at an altitude of 5 km and has a camera with a field of view of 60°, what is the width of the
ground coverage for each pass?
a) 5.77 km
b) 7.32 km
c) 8.66 km
d) 10.00 km
Answer: c) 8.66 km
Solution:
Width = 2 * altitude * tan(FOV/2)
Width = 2 * 5 * tan(30°)
Width = 10 * 0.866 = 8.66 km
4. A fighter jet accelerates from 200 m/s to 300 m/s in 5 seconds. What is its average acceleration?
a) 15 m/s²
b) 20 m/s²
c) 25 m/s²
d) 30 m/s²
Answer: b) 20 m/s²
Solution:
a = (v - u) / t
a = (300 - 200) / 5 = 20 m/s²
5. The radar cross-section (RCS) of an aircraft is reduced from 10 m² to 0.1 m². By what factor has the
detection range been reduced, assuming all other factors remain constant?
a) 1.78
b) 3.16
c) 5.62
d) 10.00
Answer: b) 3.16
Solution:
Range is proportional to the fourth root of RCS
Range reduction factor = (0.1 / 10)^(1/4) = 0.1^(1/4) ≈ 0.316
Inverse of this is 1 / 0.316 ≈ 3.16
6. A military aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an
altitude where the air density is 0.7 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 51.2 kN
b) 57.1 kN
c) 62.9 kN
d) 68.8 kN
Answer: b) 57.1 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.7 / 1.225) ≈ 57.1 kN
7. An aircraft's wing has an aspect ratio of 8 and a wingspan of 12 meters. What is the wing area?
a) 9 m²
b) 18 m²
c) 36 m²
d) 72 m²
Answer: b) 18 m²
Solution:
Aspect Ratio = wingspan² / wing area
8 = 12² / wing area
Wing area = 144 / 8 = 18 m²
8. A stealth aircraft has a radar absorbing coating that reduces the radar cross-section by 20 dB.
What is the factor by which the RCS is reduced?
a) 10
b) 20
c) 50
d) 100
Answer: d) 100
Solution:
Reduction factor = 10^(dB/10)
Reduction factor = 10^(20/10) = 10² = 100
9. An aircraft is flying at Mach 1.5 at an altitude where the speed of sound is 320 m/s. What is its
velocity in km/h?
a) 1,440 km/h
b) 1,620 km/h
c) 1,728 km/h
d) 1,836 km/h
Answer: c) 1,728 km/h
Solution:
v = Mach * speed of sound
v = 1.5 * 320 = 480 m/s
v = 480 * 3600 / 1000 = 1,728 km/h
10. A military aircraft needs to intercept a target 300 km away. If the aircraft's average speed is 2000
km/h, how long will it take to reach the target?
a) 7.5 minutes
b) 9 minutes
c) 10.5 minutes
d) 12 minutes
Answer: b) 9 minutes
Solution:
Time = Distance / Speed
Time = 300 / 2000 = 0.15 hours = 9 minutes
11. An aircraft's lift-to-drag ratio is 12. If the aircraft weighs 15,000 kg and is flying at a constant
altitude and speed, what is the drag force?
a) 12,250 N
b) 12,750 N
c) 13,250 N
d) 13,750 N
Answer: a) 12,250 N
Solution:
At constant altitude and speed, Lift = Weight
L/D = 12, so D = L/12 = W/12
D = (15000 * 9.81) / 12 ≈ 12,250 N
12. A fighter jet can pull a maximum of 9G in a turn. If the aircraft weighs 12,000 kg, what is the
maximum lift force it can generate?
a) 1,058,400 N
b) 1,058,800 N
c) 1,059,200 N
d) 1,059,600 N
Answer: a) 1,058,400 N
Solution:
Maximum lift = Weight * G-force
Maximum lift = 12000 * 9.81 * 9 = 1,058,400 N
13. An aircraft's wing has a mean aerodynamic chord of 3 meters. If the aircraft is flying at 250 m/s at
sea level (kinematic viscosity = 1.46 × 10⁻⁵ m²/s), what is the Reynolds number?
a) 51.37 × 10⁶
b) 52.37 × 10⁶
c) 53.37 × 10⁶
d) 54.37 × 10⁶
Answer: a) 51.37 × 10⁶
Solution:
Re = (v * c) / ν
Re = (250 * 3) / (1.46 × 10⁻⁵) ≈ 51.37 × 10⁶
14. A military aircraft's radar has a maximum detection range of 200 km for a target with a radar
cross-section of 1 m². What would be its detection range for a target with a radar cross-section of
0.01 m²?
a) 63.2 km
b) 79.4 km
c) 89.1 km
d) 100.0 km
Answer: a) 63.2 km
Solution:
Range is proportional to the fourth root of RCS
New range = 200 * (0.01 / 1)^(1/4) = 200 * 0.316 ≈ 63.2 km
15. An aircraft's engine has a specific fuel consumption of 0.6 kg/kN·hr. If the engine produces 80 kN
of thrust, how much fuel does it consume in 2 hours?
a) 86.4 kg
b) 91.2 kg
c) 96.0 kg
d) 100.8 kg
Answer: c) 96.0 kg
Solution:
Fuel consumption = SFC * Thrust * Time
Fuel consumption = 0.6 * 80 * 2 = 96.0 kg
16. A supersonic aircraft flies at Mach 2 at an altitude where the speed of sound is 295 m/s. What is
its velocity in m/s?
a) 570 m/s
b) 590 m/s
c) 610 m/s
d) 630 m/s
Answer: b) 590 m/s
Solution:
v = Mach * speed of sound
v = 2 * 295 = 590 m/s
17. An aircraft's wing has a span of 15 meters and a chord of 3 meters. What is its aspect ratio?
a) 3
b) 4
c) 5
d) 6
Answer: c) 5
Solution:
Aspect Ratio = span / chord = 15 / 3 = 5
18. A military drone can fly for 24 hours on a full tank of 1500 kg of fuel. If it needs to complete a 36-
hour mission, how much additional fuel is required?
a) 500 kg
b) 625 kg
c) 750 kg
d) 875 kg
Answer: c) 750 kg
Solution:
Fuel consumption rate = 1500 kg / 24 hours = 62.5 kg/hour
Additional fuel = 62.5 * (36 - 24) = 750 kg
19. An aircraft's wing loading is 3000 N/m². If the aircraft weighs 18,000 kg, what is its wing area?
a) 56.7 m²
b) 58.8 m²
c) 60.9 m²
d) 63.0 m²
Answer: b) 58.8 m²
Solution:
Wing loading = Weight / Wing area
3000 = (18000 * 9.81) / Wing area
Wing area = (18000 * 9.81) / 3000 ≈ 58.8 m²
20. A fighter jet accelerates from rest to 200 m/s in 10 seconds. What is the average acceleration?
a) 15 m/s²
b) 20 m/s²
c) 25 m/s²
d) 30 m/s²
Answer: b) 20 m/s²
Solution:
a = (v - u) / t
a = (200 - 0) / 10 = 20 m/s²
21. An aircraft's radar antenna has a diameter of 0.8 meters and operates at a frequency of 10 GHz.
What is its angular resolution in degrees? (Speed of light = 3 × 10⁸ m/s)
a) 1.61°
b) 2.15°
c) 2.69°
d) 3.23°
Answer: b) 2.15°
Solution:
Angular resolution = 70λ / D
λ = c / f = (3 × 10⁸) / (10 × 10⁹) = 0.03 m
Angular resolution = (70 * 0.03) / 0.8 ≈ 2.15°
22. A military aircraft's empty weight is 15,000 kg, and its maximum takeoff weight is 25,000 kg.
What is its payload fraction?
a) 0.30
b) 0.35
c) 0.40
d) 0.45
Answer: c) 0.40
Solution:
Payload fraction = (Maximum takeoff weight - Empty weight) / Maximum takeoff weight
Payload fraction = (25000 - 15000) / 25000 = 0.40
23. An aircraft is flying at an altitude of 10,000 m where the air density is 0.4135 kg/m³. If its true
airspeed is 250 m/s, what is its dynamic pressure?
a) 11,850 Pa
b) 12,350 Pa
c) 12,850 Pa
d) 13,350 Pa
Answer: c) 12,850 Pa
Solution:
Dynamic pressure = 0.5 * ρ * v²
Dynamic pressure = 0.5 * 0.4135 * 250² ≈ 12,850 Pa
24. A stealth aircraft has a radar cross-section of 0.0001 m². If a conventional aircraft of similar size
has a radar cross-section of 5 m², by what factor has the detection range been reduced?
a) 5.62
b) 6.69
c) 7.75
d) 8.82
Answer: b) 6.69
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (5 / 0.0001)^(1/4) = 50000^(1/4) ≈ 6.69
25. An aircraft's wing has a sweep angle of 35°. If the wing span measured perpendicular to the
aircraft's centerline is 12 meters, what is the true wing span?
a) 13.45 m
b) 14.65 m
c) 15.85 m
d) 17.05 m
Answer: b) 14.65 m
Solution:
True span = Perpendicular span / cos(sweep angle)
True span = 12 / cos(35°) ≈ 14.65 m
26. A military transport aircraft needs to airdrop supplies to a location 500 km away. If the aircraft
cruises at 800 km/h and needs 20 minutes for the airdrop procedure, what is the total mission time?
a) 57.5 minutes
b) 62.5 minutes
c) 67.5 minutes
d) 72.5 minutes
Answer: c) 67.5 minutes
Solution:
Flight time = Distance / Speed = 500 / 800 = 0.625 hours = 37.5 minutes
Total mission time = 37.5 + 20 +27. An aircraft's wing has a chord of 2.5 meters at the root and 1.5
meters at the tip. If the wingspan is 10 meters, what is the wing area?
a) 18.75 m²
b) 20.00 m²
c) 21.25 m²
d) 22.50 m²
Answer: b) 20.00 m²
Solution:
Wing area = (Root chord + Tip chord) * Span / 2
Wing area = (2.5 + 1.5) * 10 / 2 = 20.00 m²
28. A fighter jet's radar can detect a target with a radar cross-section of 1 m² at a range of 100 km. At
what range can it detect a target with a radar cross-section of 0.1 m²?
a) 56.2 km
b) 66.2 km
c) 76.2 km
d) 86.2 km
Answer: a) 56.2 km
Solution:
Range is proportional to the fourth root of RCS
New range = 100 * (0.1 / 1)^(1/4) = 100 * 0.562 ≈ 56.2 km
29. An aircraft is flying at Mach 1.2 at an altitude where the temperature is -50°C. What is its speed in
m/s? (Assume the speed of sound in air is given by v = 331.3 + 0.606T, where T is in °C)
a) 345.6 m/s
b) 366.8 m/s
c) 388.0 m/s
d) 409.2 m/s
Answer: b) 366.8 m/s
Solution:
Speed of sound = 331.3 + 0.606 * (-50) = 301.0 m/s
Aircraft speed = 1.2 * 301.0 ≈ 366.8 m/s
30. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
. A military drone has a fuel capacity of 500 kg and burns fuel at a rate of 50 kg/hour. If it needs to
maintain a 24-hour patrol, what percentage of its takeoff weight must be reserved for fuel if the
drone's empty weight is 1000 kg?
a) 27.8%
b) 33.3%
c) 38.5%
d) 44.4%
Answer: b) 33.3%
Solution:
Fuel required = 50 kg/hour * 24 hours = 1200 kg
Total takeoff weight = 1000 kg + 1200 kg = 2200 kg
Fuel percentage = 1200 / 2200 * 100 ≈ 33.3%
31. An aircraft's wing has an aspect ratio of 9 and a wing area of 27 m². What is its wingspan?
a) 14.56 m
b) 15.06 m
c) 15.56 m
d) 16.06 m
Answer: c) 15.56 m
Solution:
Aspect Ratio = Wingspan² / Wing Area
9 = Wingspan² / 27
Wingspan = √(9 * 27) ≈ 15.56 m
32. A fighter jet can accelerate from 200 m/s to 300 m/s in 6 seconds. What is its acceleration in g's?
(g = 9.81 m/s²)
a) 1.36 g
b) 1.70 g
c) 2.04 g
d) 2.38 g
Answer: b) 1.70 g
Solution:
Acceleration = (v - u) / t = (300 - 200) / 6 = 16.67 m/s²
In g's = 16.67 / 9.81 ≈ 1.70 g
33. An aircraft's radar has a peak power output of 50 kW and a pulse duration of 2 μs. What is the
energy per pulse?
a) 0.05 J
b) 0.10 J
c) 0.15 J
d) 0.20 J
Answer: b) 0.10 J
Solution:
Energy = Power * Time
Energy = 50,000 W * 2 * 10^-6 s = 0.10 J
34. A stealth aircraft has a radar cross-section that is reduced by a factor of 1000 compared to a
conventional aircraft. By what factor is the detection range reduced?
a) 3.16
b) 4.47
c) 5.62
d) 6.69
Answer: c) 5.62
Solution:
Range reduction factor = (1 / RCS reduction factor)^(1/4)
Range reduction factor = (1 / 1000)^(1/4) ≈ 5.62
35. An aircraft is flying at 900 km/h at an altitude where the speed of sound is 320 m/s. What is its
Mach number?
a) 0.68
b) 0.78
c) 0.88
d) 0.98
Answer: b) 0.78
Solution:
Speed in m/s = 900 * 1000 / 3600 = 250 m/s
Mach number = Speed / Speed of sound = 250 / 320 ≈ 0.78
36. A military transport aircraft has a cargo hold with dimensions 20 m x 3 m x 3 m. If it's carrying
cargo with a density of 300 kg/m³, what is the maximum cargo weight it can hold?
a) 48,000 kg
b) 52,000 kg
c) 54,000 kg
d) 58,000 kg
Answer: c) 54,000 kg
Solution:
Volume = 20 * 3 * 3 = 180 m³
Max cargo weight = Volume * Density = 180 * 300 = 54,000 kg
37. An aircraft's wing has a leading edge sweep angle of 35°. If the straight-line distance from the
wing root to tip is 10 m, what is the wingspan measured perpendicular to the aircraft's centerline?
a) 7.39 m
b) 8.19 m
c) 8.99 m
d) 9.79 m
Answer: b) 8.19 m
Solution:
Perpendicular span = Straight-line distance * cos(sweep angle)
Perpendicular span = 10 * cos(35°) ≈ 8.19 m
38. A fighter jet's radar operates at a frequency of 10 GHz. What is the wavelength of the radar
signal? (Speed of light = 3 x 10^8 m/s)
a) 2 cm
b) 3 cm
c) 4 cm
d) 5 cm
Answer: b) 3 cm
Solution:
Wavelength = Speed of light / Frequency
Wavelength = (3 x 10^8) / (10 x 10^9) = 0.03 m = 3 cm
39. An aircraft's engine produces 100 kN of thrust at sea level. If the aircraft is flying at an altitude
where the air density is 0.5 kg/m³ and the sea level air density is 1.225 kg/m³, what is the
approximate thrust at this altitude? (Assume thrust is directly proportional to air density)
a) 35.7 kN
b) 40.8 kN
c) 45.9 kN
d) 51.0 kN
Answer: b) 40.8 kN
Solution:
Thrust ratio = Density ratio
Thrust at altitude = 100 * (0.5 / 1.225) ≈ 40.8 kN
40. A military aircraft needs to intercept a target 600 km away. If the aircraft's average speed is 1800
km/h, how long will it take to reach the target?
a) 15 minutes
b) 20 minutes
c) 25 minutes
d) 30 minutes
Answer: b) 20 minutes
Solution:
Time = Distance / Speed
Time = 600 / 1800 = 1/3 hour = 20 minutes
41. An aircraft's wing has a mean aerodynamic chord of 2.5 meters. If the aircraft is flying at 200 m/s
at an altitude where the kinematic viscosity of air is 3.5 × 10⁻⁵ m²/s, what is the Reynolds number?
a) 12.86 × 10⁶
b) 14.29 × 10⁶
c) 15.71 × 10⁶
d) 17.14 × 10⁶
Answer: b) 14.29 × 10⁶
Solution:
Re = (v * c) / ν
Re = (200 * 2.5) / (3.5 × 10⁻⁵) ≈ 14.29 × 10⁶
42. A stealth aircraft has a radar cross-section of 0.0005 m². If a conventional aircraft of similar size
has a radar cross-section of 2 m², by what factor has the detection range been reduced?
a) 3.76
b) 4.47
c) 5.18
d) 5.89
Answer: b) 4.47
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (2 / 0.0005)^(1/4) = 4000^(1/4) ≈ 4.47
43. An aircraft's wing has a taper ratio of 0.6. If the root chord is 4 meters, what is the tip chord?
a) 1.8 m
b) 2.0 m
c) 2.2 m
d) 2.4 m
Answer: d) 2.4 m
Solution:
Taper ratio = Tip chord / Root chord
0.6 = Tip chord / 4
Tip chord = 0.6 * 4 = 2.4 m
44. A military drone can fly for 18 hours on a full tank of 900 kg of fuel. If it needs to complete a 30-
hour mission, how much additional fuel is required?
a) 500 kg
b) 600 kg
c) 700 kg
d) 800 kg
Answer: b) 600 kg
Solution:
Fuel consumption rate = 900 kg / 18 hours = 50 kg/hour
Additional fuel = 50 * (30 - 18) = 600 kg
45. An aircraft's wing loading is 3500 N/m². If the aircraft weighs 20,000 kg, what is its wing area?
a) 52.6 m²
b) 55.9 m²
c) 59.2 m²
d) 62.5 m²
Answer: b) 55.9 m²
Solution:
Wing loading = Weight / Wing area
3500 = (20000 * 9.81) / Wing area
Wing area = (20000 * 9.81) / 3500 ≈ 55.9 m²
46. A fighter jet can pull a maximum of 9G in a turn. If the aircraft weighs 15,000 kg, what is the
maximum lift force it can generate?
a) 1,293,000 N
b) 1,323,000 N
c) 1,353,000 N
d) 1,383,000 N
Answer: c) 1,353,000 N
Solution:
Maximum lift = Weight * G-force
Maximum lift = 15000 * 9.81 * 9 = 1,323,450 N ≈ 1,353,000 N
47. An aircraft's radar antenna has a diameter of 1 meter and operates at a frequency of 5 GHz. What
is its angular resolution in degrees? (Speed of light = 3 × 10⁸ m/s)
a) 3.42°
b) 3.92°
c) 4.42°
d) 4.92°
Answer: a) 3.42°
Solution:
Angular resolution = 70λ / D
λ = c / f = (3 × 10⁸) / (5 × 10⁹) = 0.06 m
Angular resolution = (70 * 0.06) / 1 ≈ 3.42°
48. A military aircraft's empty weight is 12,000 kg, and its maximum takeoff weight is 22,000 kg.
What is its payload fraction?
a) 0.35
b) 0.40
c) 0.45
d) 0.50
Answer: c) 0.45
Solution:
Payload fraction = (Maximum takeoff weight - Empty weight) / Maximum takeoff weight
Payload fraction = (22000 - 12000) / 22000 = 0.45
49. An aircraft is flying at an altitude of 8,000 m where the air density is 0.5258 kg/m³. If its true
airspeed is 220 m/s, what is its dynamic pressure?
a) 12,350 Pa
b) 12,725 Pa
c) 13,100 Pa
d) 13,475 Pa
Answer: b) 12,725 Pa
Solution:
Dynamic pressure = 0.5 * ρ * v²
Dynamic pressure = 0.5 * 0.5258 * 220² ≈ 12,725 Pa
50. A stealth aircraft has a radar cross-section of 0.0002 m². If a conventional aircraft of similar size
has a radar cross-section of 4 m², by what factor has the detection range been reduced?
a) 5.62
b) 6.30
c) 6.98
d) 7.66
Answer: b) 6.30
Solution:
Range reduction factor = (RCS1 / RCS2)^(1/4)
Range reduction factor = (4 / 0.0002)^(1/4) = 20000^(1/4) ≈ 6.30
51. An aircraft's wing has a sweep angle of 30°. If the wing span measured perpendicular to the
aircraft's centerline is 15 meters, what is the true wing span?
a) 16.54 m
b) 17.32 m
c) 18.10 m
d) 18.88 m
Answer: b) 17.32 m
Solution:
True span = Perpendicular span / cos(sweep angle)
True span = 15 / cos(30°) ≈ 17.32 m
52. A military transport aircraft needs to airdrop supplies to a location 800 km away. If the aircraft
cruises at 750 km/h and needs 30 minutes for the airdrop procedure, what is the total mission time?
a) 1 hour
