Mathematical Problems in Composite Material Repair for Aircraft
Structures
1. What is the area of a rectangular composite patch that measures 15 cm by 20 cm?
a) 300 cm²
b) 350 cm²
c) 250 cm²
d) 400 cm²
Answer: a) 300 cm²
2. If a composite repair requires a 1:2 resin to hardener ratio, how much hardener is needed for 300
g of resin?
a) 100 g
b) 150 g
c) 200 g
d) 250 g
Answer: b) 150 g
3. A composite panel has a density of 1.6 g/cm³. What is its mass if it measures 50 cm x 30 cm x 0.5
cm?
a) 1000 g
b) 1200 g
c) 1400 g
d) 1600 g
Answer: b) 1200 g
4. If a repair technician can complete 3 small composite patches in 2 hours, how many can they
complete in an 8-hour shift?
a) 10
b) 12
c) 14
d) 16
Answer: b) 12
5. A composite repair material has a tensile strength of 500 MPa. What is this value in psi? (1 MPa ≈
145 psi)
a) 65,500 psi
b) 72,500 psi
c) 79,500 psi
d) 86,500 psi
Answer: b) 72,500 psi
6. If a composite laminate consists of 8 plies, each 0.125 mm thick, what is the total thickness of the
laminate?
a) 0.75 mm
b) 1 mm
c) 1.25 mm
d) 1.5 mm
Answer: b) 1 mm
7. A repair shop uses 5 kg of carbon fiber per day. How many kilograms will they use in a 30-day
month?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
8. If a composite repair cures at a rate of 2°C per minute, how long will it take to reach 120°C from
room temperature (20°C)?
a) 40 minutes
b) 50 minutes
c) 60 minutes
d) 70 minutes
Answer: b) 50 minutes
9. A composite panel weighs 2.5 kg/m². What is the weight of a panel measuring 1.2 m x 1.8 m?
a) 4.5 kg
b) 5.0 kg
c) 5.4 kg
d) 5.8 kg
Answer: c) 5.4 kg
10. If a repair technique has a 95% success rate, out of 200 repairs, approximately how many might
fail?
a) 5
b) 10
c) 15
d) 20
Answer: b) 10
11. A composite repair material expands by 0.002% for every 1°C increase in temperature. By what
percentage will it expand when heated from 20°C to 80°C?
a) 0.10%
b) 0.12%
c) 0.14%
d) 0.16%
Answer: b) 0.12%
12. If a composite patch requires 3 layers of fabric, each weighing 200 g/m², what is the total weight
of fabric needed for a 0.5 m² repair?
a) 200 g
b) 250 g
c) 300 g
d) 350 g
Answer: c) 300 g
13. A repair technician can sand 0.5 m² of composite surface in 15 minutes. How long will it take to
sand a surface of 3.5 m²?
a) 1 hour 30 minutes
b) 1 hour 45 minutes
c) 2 hours
d) 2 hours 15 minutes
Answer: b) 1 hour 45 minutes
14. If a composite repair material costs $150/kg and a repair uses 1.2 kg, what is the material cost for
the repair?
a) $160
b) $170
c) $180
d) $190
Answer: c) $180
15. A composite panel has a Young's modulus of 70 GPa. What is its stiffness in N/m if it's 2 m long
and has a cross-sectional area of 0.001 m²?
a) 35 MN/m
b) 45 MN/m
c) 55 MN/m
d) 65 MN/m
Answer: a) 35 MN/m
16. If a repair requires a mixture of 70% resin A and 30% resin B, how much of each is needed to
make 500 g of the mixture?
a) 300 g A, 200 g B
b) 350 g A, 150 g B
c) 400 g A, 100 g B
d) 450 g A, 50 g B
Answer: b) 350 g A, 150 g B
17. A composite repair cures in 24 hours at 20°C. If the curing time halves for every 10°C increase,
how long will it take at 40°C?
a) 4 hours
b) 6 hours
c) 8 hours
d) 10 hours
Answer: b) 6 hours
18. If a composite patch has a thermal conductivity of 0.5 W/m·K, what is the heat flux through a 2
cm thick patch with a temperature difference of 40°C across it?
a) 1000 W/m²
b) 1100 W/m²
c) 1200 W/m²
d) 1300 W/m²
Answer: a) 1000 W/m²
19. A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of
0.1%, what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
A composite repair material has a Poisson's ratio of 0.3. If it experiences a longitudinal strain of 0.1%,
what is the corresponding lateral strain?
a) -0.02%
b) -0.03%
c) -0.04%
d) -0.05%
Answer: b) -0.03%
20. If a composite panel weighs 5 kg/m² and an aircraft has 30 m² of this paneling, what is the total
weight of the paneling?
a) 120 kg
b) 140 kg
c) 150 kg
d) 160 kg
Answer: c) 150 kg
21. A repair technique reduces the strength of a composite by 5%. If the original strength was 600
MPa, what is the new strength?
a) 540 MPa
b) 550 MPa
c) 560 MPa
d) 570 MPa
Answer: d) 570 MPa
22. If a composite repair material costs $200/m² and a repair requires 1.5 m², what is the total
material cost?
a) $250
b) $275
c) $300
d) $325
Answer: c) $300
23. A composite panel has a coefficient of thermal expansion of 3 × 10⁻⁶/°C. How much will a 2 m
panel expand when heated from 20°C to 80°C?
a) 0.32 mm
b) 0.36 mm
c) 0.40 mm
d) 0.44 mm
Answer: b) 0.36 mm
24. If a repair shop can process 5 kg of composite material per hour, how many kilograms can it
process in a 40-hour work week?
a) 180 kg
b) 190 kg
c) 200 kg
d) 210 kg
Answer: c) 200 kg
25. A composite repair adhesive has a shear strength of 30 MPa. What force can be supported by a
bonded area of 25 cm²?
a) 65,000 N
b) 70,000 N
c) 75,000 N
d) 80,000 N
Answer: c) 75,000 N
26. If a composite repair requires 3 hours of labor at $75/hour and materials costing $250, what is
the total repair cost?
a) $450
b) $475
c) $500
d) $525
Answer: b) $475
27. A composite panel has a mass of 10 kg and a volume of 0.005 m³. What is its density?
a) 1800 kg/m³
b) 1900 kg/m³
c) 2000 kg/m³
d) 2100 kg/m³
Answer: c) 2000 kg/m³
28. If a repair technique increases the stiffness of a composite by 15%, what is the new stiffness if the
original was 80 GPa?
a) 88 GPa
b) 90 GPa
c) 92 GPa
d) 94 GPa
Answer: c) 92 GPa
29. A composite repair material has a specific heat capacity of 1200 J/kg·K. How much energy is
required to raise the temperature of 2 kg of this material by 50°C?
a) 110 kJ
b) 120 kJ
c) 130 kJ
d) 140 kJ
Answer: b) 120 kJ
30. If a composite panel can withstand a pressure of 2 MPa, what is the maximum force it can
support over an area of 0.5 m²?
a) 900 kN
b) 950 kN
c) 1000 kN
d) 1050 kN
Answer: c) 1000 kN
31. A repair shop uses 2 kg of resin per composite repair. If they have 30 kg of resin in stock, how
many repairs can they complete?
a) 13
b) 14
c) 15
d) 16
Answer: c) 15
32. If a composite repair cures at a rate of 1.5°C per minute, how long will it take to reach 90°C from
room temperature (20°C)?
a) 40 minutes
b) 45 minutes
c) 50 minutes
d) 55 minutes
Answer: b) 45 minutes
33. A composite panel has a thermal diffusivity of 5 × 10⁻⁷ m²/s. How long will it take for a
temperature change to propagate through a 2 mm thick panel?
a) 6 seconds
b) 7 seconds
c) 8 seconds
d) 9 seconds
Answer: c) 8 seconds
34. If a composite repair material has a Poisson's ratio of 0.35 and experiences a lateral strain of -
0.07%, what is the corresponding longitudinal strain?
a) 0.15%
b) 0.20%
c) 0.25%
d) 0.30%
Answer: b) 0.20%
35. A composite panel weighs 3 kg/m². What is the weight of a panel measuring 2.5 m x 1.8 m?
a) 12.5 kg
b) 13.5 kg
c) 14.5 kg
d) 15.5 kg
Answer: b) 13.5 kg
36. If a repair technique reduces the weight of a composite part by 8%, what is the new weight if the
original was 25 kg?
a) 22 kg
b) 23 kg
c) 24 kg
d) 25 kg
Answer: b) 23 kg
37. A composite repair material has a tensile strength of 450 MPa. If a repair patch is 10 cm wide and
0.5 cm thick, what is the maximum tensile force it can withstand?
a) 215 kN
b) 220 kN
c) 225 kN
d) 230 kN
Answer: c) 225 kN
38. If a composite repair requires a mixture of 60% resin A, 30% resin B, and 10% hardener, how
much of each component is needed to make 1 kg of the mixture?
a) 550 g A, 300 g B, 150 g hardener
b) 600 g A, 300 g B, 100 g hardener
c) 650 g A, 250 g B, 100 g hardener
d) 700 g A, 200 g B, 100 g hardener
Answer: b) 600 g A, 300 g B, 100 g hardener
39. A composite panel has a Young's modulus of 65 GPa and a cross-sectional area of 0.002 m². What
force is required to produce an elongation of 0.5 mm in a 1 m long panel?
a) 60 kN
b) 65 kN
c) 70 kN
d) 75 kN
Answer: b) 65 kN
40. If a repair shop can complete 4 composite repairs per day, how many can they complete in a 22-
day work month?
a) 84
b) 86
c) 88
d) 90
Answer: c) 88
41. A composite repair material has a shear modulus of 30 GPa. What is the shear stress if the shear
strain is 0.002?
a) 55 MPa
b) 60 MPa
c) 65 MPa
d) 70 MPa
Answer: b) 60 MPa
42. If a composite panel has a mass of 5 kg and dimensions of 1 m x 1 m x 0.01 m, what is its density?
a) 450 kg/m³
b) 475 kg/m³
c) 500 kg/m³
d) 525 kg/m³
Answer: c) 500 kg/m³
43. A repair technique increases the strength of a composite by 12%. If the new strength is 560 MPa,
what was the original strength?
a) 480 MPa
b) 490 MPa
c) 500 MPa
d) 510 MPa
Answer: c) 500 MPa
44. If a composite repair material costs $180/kg and a repair uses 1.5 kg, what is the material cost for
the repair?
a) $250
b) $260
c) $270
d) $280
Answer: c) $270
45. A composite panel has a thermal conductivity of 0.8 W/m·K. What is the heat flux through a 1.5
cm thick panel with a temperature difference of 30°C across it?
a) 1500 W/m²
b) 1600 W/m²
c) 1700 W/m²
d) 1800 W/m²
Answer: b) 1600 W/m²
46. If a repair requires a mixture of 75% resin and 25% hardener, how much hardener is needed for
400 g of resin?
a) 125 g
b) 133 g
c) 141 g
d) 150 g
Answer: b) 133 g
47. A composite repair cures in 36 hours at 15°C. If the curing time halves for every 15°C increase,
how long will it take at 45°C?
a) 4 hours
b) 4.5 hours
c) 5
