Development of Air Transportation Systems for Urban Environments: Air
Taxis and Small Aircraft: Multiple Choice Questions (MCQ) with Answers
1. What is the typical range of an electric air taxi?
a) 50-100 km
b) 100-200 km
c) 200-300 km
d) 300-400 km
Answer: b) 100-200 km
2. Calculate the power required for an air taxi with a mass of 1000 kg to hover, assuming a power-to-
weight ratio of 1.5 kW/kg.
a) 1000 kW
b) 1250 kW
c) 1500 kW
d) 1750 kW
Answer: c) 1500 kW
3. What is the typical cruise speed of an urban air mobility (UAM) vehicle?
a) 50-100 km/h
b) 100-150 km/h
c) 150-200 km/h
d) 200-250 km/h
Answer: c) 150-200 km/h
4. If an air taxi has a battery capacity of 100 kWh and consumes energy at a rate of 0.5 kWh/km,
what is its maximum range?
a) 100 km
b) 150 km
c) 200 km
d) 250 km
Answer: c) 200 km
5. What is the typical passenger capacity of an air taxi?
a) 1-2 passengers
b) 2-4 passengers
c) 4-6 passengers
d) 6-8 passengers
Answer: b) 2-4 passengers
6. Calculate the time required for an air taxi to travel 50 km at a cruise speed of 180 km/h.
a) 10 minutes
b) 15 minutes
c) 20 minutes
d) 25 minutes
Answer: c) 20 minutes
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
7. What is the typical maximum takeoff weight (MTOW) for a small electric VTOL aircraft?
a) 500-1000 kg
b) 1000-1500 kg
c) 1500-2000 kg
d) 2000-2500 kg
Answer: b) 1000-1500 kg
8. If an air taxi uses 8 electric motors, each rated at 40 kW, what is the total power output?
a) 240 kW
b) 280 kW
c) 320 kW
d) 360 kW
Answer: c) 320 kW
9. What is the typical noise level of an electric air taxi at takeoff?
a) 50-60 dB
b) 60-70 dB
c) 70-80 dB
d) 80-90 dB
Answer: c) 70-80 dB
10. Calculate the energy consumption of an air taxi that travels 100 km and uses 75 kWh of energy.
a) 0.5 kWh/km
b) 0.75 kWh/km
c) 1.0 kWh/km
d) 1.25 kWh/km
Answer: b) 0.75 kWh/km
11. What is the typical cruise altitude for urban air mobility vehicles?
a) 100-300 m
b) 300-600 m
c) 600-900 m
d) 900-1200 m
Answer: b) 300-600 m
12. If an air taxi has a lift-to-drag ratio of 10 and a mass of 1200 kg, what is the drag force at cruise
speed?
a) 588 N
b) 1176 N
c) 1764 N
d) 2352 N
Answer: b) 1176 N
13. What is the typical battery energy density for electric air taxis?
a) 100-150 Wh/kg
b) 150-200 Wh/kg
c) 200-250 Wh/kg
d) 250-300 Wh/kg
Answer: c) 200-250 Wh/kg
14. Calculate the power required for an air taxi with a mass of 1500 kg to climb at a rate of 5 m/s.
a) 73.5 kW
b) 147 kW
c) 220.5 kW
d) 294 kW
Answer: a) 73.5 kW
15. What is the typical rotor diameter for a small electric VTOL aircraft?
a) 1-2 m
b) 2-3 m
c) 3-4 m
d) 4-5 m
Answer: b) 2-3 m
16. If an air taxi travels 30 km in 12 minutes, what is its average speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
17. What is the typical payload capacity of an air taxi?
a) 100-200 kg
b) 200-300 kg
c) 300-400 kg
d) 400-500 kg
Answer: b) 200-300 kg
18. Calculate the thrust-to-weight ratio of an air taxi with a thrust of 15,000 N and a weight of 12,000
N.
a) 0.8
b) 1.0
c) 1.25
d) 1.5
Answer: c) 1.25
19. What is the typical charging time for an air taxi battery?
a) 15-30 minutes
b) 30-45 minutes
c) 45-60 minutes
d) 60-75 minutes
Answer: b) 30-45 minutes
20. If an air taxi consumes 0.6 kWh/km and electricity costs $0.15/kWh, what is the energy cost per
kilometer?
a) $0.05/km
b) $0.09/km
c) $0.12/km
d) $0.15/km
Answer: b) $0.09/km
21. What is the typical wingspan of a small fixed-wing electric aircraft for urban air mobility?
a) 5-8 m
b) 8-11 m
c) 11-14 m
d) 14-17 m
Answer: b) 8-11 m
22. Calculate the disk loading of a VTOL aircraft with a total weight of 1500 kg and a total rotor disk
area of 30 m².
a) 30 kg/m²
b) 40 kg/m²
c) 50 kg/m²
d) 60 kg/m²
Answer: c) 50 kg/m²
23. What is the typical maximum landing weight (MLW) as a percentage of MTOW for an air taxi?
a) 85-90%
b) 90-95%
c) 95-100%
d) 100%
Answer: c) 95-100%
24. If an air taxi has a cruise speed of 180 km/h and a headwind of 30 km/h, what is its ground
speed?
a) 120 km/h
b) 140 km/h
c) 150 km/h
d) 160 km/h
Answer: c) 150 km/h
25. What is the typical power-to-weight ratio for an electric air taxi?
a) 0.5-1.0 kW/kg
b) 1.0-1.5 kW/kg
c) 1.5-2.0 kW/kg
d) 2.0-2.5 kW/kg
Answer: b) 1.0-1.5 kW/kg
26. Calculate the induced velocity for a hovering VTOL aircraft with a disk loading of 40 kg/m² and air
density of 1.225 kg/m³.
a) 10.2 m/s
b) 12.7 m/s
c) 15.3 m/s
d) 17.8 m/s
Answer: b) 12.7 m/s
27. What is the typical cruise lift coefficient for a small fixed-wing electric aircraft?
a) 0.2-0.4
b) 0.4-0.6
c) 0.6-0.8
d) 0.8-1.0
Answer: b) 0.4-0.6
28. If an air taxi has a mass of 1200 kg and 4 rotors, each with a diameter of 2.5 m, what is the disk
loading?
a) 48.8 kg/m²
b) 61.0 kg/m²
c) 73.2 kg/m²
d) 85.4 kg/m²
Answer: b) 61.0 kg/m²
29. What is the typical aspect ratio for wings of small electric aircraft designed for urban air mobility?
a) 4-6
b) 6-8
c) 8-10
d) 10-12
Answer: c) 8-10
30. Calculate the power required for an air taxi with a mass of 1000 kg to maintain level flight at 150
km/h, assuming a lift-to-drag ratio of 12.
a) 33.7 kW
b) 40.4 kW
c) 47.1 kW
d) 53.8 kW
Answer: b) 40.4 kW
31. What is the typical battery weight as a percentage of MTOW for an electric air taxi?
a) 10-20%
b) 20-30%
c) 30-40%
d) 40-50%
Answer: c) 30-40%
32. If an air taxi has a range of 150 km with 4 passengers, what would be its approximate range with
2 passengers, assuming a linear relationship?
a) 175 km
b) 200 km
c) 225 km
d) 250 km
Answer: c) 225 km
33. What is the typical propeller efficiency for electric air taxis?
a) 60-70%
b) 70-80%
c) 80-90%
d) 90-95%
Answer: c) 80-90%
34. Calculate the thrust required for an air taxi with a mass of 1500 kg to hover, assuming a thrust-to-
weight ratio of 1.2.
a) 14,700 N
b) 16,200 N
c) 17,700 N
d) 19,200 N
Answer: c) 17,700 N
35. What is the typical maximum rate of climb for an electric air taxi?
a) 2-4 m/s
b) 4-6 m/s
c) 6-8 m/s
d) 8-10 m/s
Answer: b) 4-6 m/s
36. If an air taxi has a battery capacity of 120 kWh and uses 80% of its capacity during a 45-minute
flight, what is its average power consumption?
a) 96 kW
b) 128 kW
c) 160 kW
d) 192 kW
Answer: b) 128 kW
37. What is the typical maximum bank angle for air taxis during turns?
a) 15-20 degrees
b) 20-25 degrees
c) 25-30 degrees
d) 30-35 degrees
Answer: c) 25-30 degrees
38. Calculate the induced drag coefficient of a wing with an aspect ratio of 9 and a lift coefficient of
0.6, assuming an elliptical lift distribution.
a) 0.0126
b) 0.0157
c) 0.0189
d) 0.0220
Answer: a) 0.0126
39. What is the typical cruise lift-to-drag ratio for an electric air taxi?
a) 6-8
b) 8-10
c) 10-12
d) 12-14
Answer: c) 10-12
40. If an air taxi has a maximum takeoff weight of 1800 kg and an empty weight of 1200 kg, what is
its useful load?
a) 400 kg
b) 500 kg
c) 600 kg
d) 700 kg
Answer: c) 600 kg
41. What is the typical propeller tip speed for electric air taxis?
a) 150-200 m/s
b) 200-250 m/s
c) 250-300 m/s
d) 300-350 m/s
Answer: b) 200-250 m/s
42. Calculate the power required for an air taxi with a mass of 1300 kg to climb at a rate of 4 m/s
with a forward speed of 100 km/h.
a) 51.1 kW
b) 76.7 kW
c) 102.2 kW
d) 127.8 kW
Answer: c) 102.2 kW
43. What is the typical maximum descent rate for an electric air taxi during normal operations?
a) 2-3 m/s
b) 3-4 m/s
c) 4-5 m/s
d) 5-6 m/s
Answer: b) 3-4 m/s
44. If an air taxi has a lift-to-drag ratio of 11 at cruise and a mass of 1400 kg, what is the thrust
required for level flight?
a) 1245 N
b) 1373 N
c) 1501 N
d) 1629 N
Answer: a) 1245 N
45. What is the typical maximum crosswind component for air taxi operations?
a) 10-15 knots
b) 15-20 knots
c) 20-25 knots
d) 25-30 knots
Answer: b) 15-20 knots
46. Calculate the energy required for an air taxi with a mass of 1200 kg to climb 300 m.
a) 980 kJ
b) 3528 kJ
c) 5880 kJ
d) 7056 kJ
Answer: b) 3528 kJ
47. What is the typical maximum propeller RPM for electric air taxis?
a) 1000-1500 RPM
b) 1500-2000 RPM
c) 2000-2500 RPM
d) 2500-3000 RPM
Answer: c) 2000-2500 RPM
48. If an air taxi has a battery capacity of 150 kWh and a mass of 1500 kg, what is its specific energy?
a) 75 Wh/kg
b) 100 Wh/kg
c) 125 Wh/kg
d) 150 Wh/kg
Answer: b) 100 Wh/kg
49. What is the typical maximum glide ratio for a small fixed-wing electric aircraft?
a) 10:1
b) 15:1
c) 20:1
d) 25:1
Answer: c) 20:1
50. Calculate the time required for an air taxi to accelerate from 0 to 100 km/h with a constant
acceleration of 2 m/s².
a) 10.8 s
b) 13.9 s
c) 17.0 s
d) 20.1 s
Answer: b) 13.9 s
51. What is the typical maximum wind speed for air
