DGCA Module 08 Aerodynamics, 1st session of 2017 covered fundamental concepts, airflow principles, lift, drag, aircraft performance and mixed type questions.
DGCA Module 08
1st Session of 2017
1. In flat turn, what moment will be happen.
A) Pitching moment only
B) Yawing moment only
C) Pitching and yawing both
Answer
2. In the half way the stability between stability and instability is called.
A) Perfect stability
B) Out of trim stability
C) Neutral stability
Answer
3. Directional control provided by.
A) Aileron
B) Elevator
C) Rudder
Answer
4. If the aspect ratio increases, the induced drag will be.
A) Halved
B) Doubled
C) Not effected
Answer
5. If an aircraft having infinite aspect ratio then it will not be subjected to.
A) Wingtip vortices
B) Induced drag
C) Wingtip vortices and induced drag
Answer
6. If an aircraft bank turn, the angle of attack is independent from.
A) Lift
B) Drag
C) Weight
Answer
7. Density of air at sea level.
A) 1.225 kg/m³
B) 1.025 kg/m³
C) 1.205 kg/m³
Answer
8. The lapse rate in the stratosphere region.
A) 6.5 k/feet
B) 0 k/feet
C) 5 k/feet
Answer
9. The amount of air in the atmosphere apply at the top of surface.
A) Force
B) Pressure
C) Weight
Answer
10. If the aircraft is sideslip, which stability is affected.
A) Lateral stability
B) Longitudinal stability
C) Vertical stability
Answer
11. If the thrust line is placed above the drag, the nose of the aircraft tends to.
A) Pitched nose up aircraft
B) Pitched nose down aircraft
C) None
Answer
12. The aileron control is used to provide control around to.
A) Lateral control in longitudinal plane
B) Longitudinal control in lateral plane
C) Both
Answer
13. In streamline, the air.
A) The air is flow parallel to the main center line
B) Pressure drop is uniform
C) Velocity will be equal at each place
Answer
14. To reduce take-off runway range aircraft fly.
A) Along the wind
B) Against the wind
C) Cross the wind
Answer
15. At high speed, the induced drag.
A) Less than 10% of total drag
B) Less than 25% of total drag
C) More than 25% of total drag
Answer
16. Density of air.
A) Weight per unit volume
B) Mass per unit volume
C) Mass per unit area
Answer
17. Aileron provides which control.
A) Longitudinal
B) Pitch
C) Roll
Answer
18. At height in steady flight.
A) Height is constant
B) Velocity constant
C) Height and velocity constant in fixed
D) Direction constant
Answer
19. Longitudinal stability is affected by.
A) Center of pressure position change
B) Pitching movement along the fuselage
C) Vertical stabilizer
Answer
20. Which does not depend on the density of air for its operation.
A) Rocket
B) Parachute
C) Kite
Answer
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