DGCA Module 08 Aerodynamics, 2nd Session of 2023 focused on airflow principles, wingtip vortices, angle of attack, and drag components. Questions emphasized real-time flight conditions, stability and control, critical Mach number, and lift-drag ratio, assessing both theoretical knowledge and practical understanding of aerodynamic performance and efficiency.
Module 08
2nd Session of 2023
1. Compressibility effect is.
A) The resistance of airflow to temperature change
B) Change in air density at high speeds
C) Ability of air to flow without friction
2. The stability which is very rarely achieved in practice is.
A) Neutral Stability
B) Static Stability
C) Dead Beat Stability
3. Glass cockpit refers to.
A) Mechanical gauges
B) Electronic display systems
C) Transparent canopy
4. In level flight, thrust is equal to.
A) Lift
B) Drag
C) Weight
5. According to ISA at sea level, the standard temperature, pressure & density are.
A) 15°C, 101325 N/m², 1.225 kg/m³
B) 273°C, 1000 N/m², 1.00 kg/m³
C) 0°C, 101325 N/m², 1.0 kg/m
6. Directional stability is related to.
A) Pitching
B) Yawing
C) Rolling
7. If Aspect Ratio increases.
A) Induced drag decreases
B) Induced drag increases
C) Form drag increases
8. Temperature variations near the earth’s surface are.
A) Constant
B) Smaller
C) Greater
9. For normal temperature conditions.
A) Humid air is denser than dry air
B) Dry air is denser than humid air
C) Both have same density
10. Load factor increases with.
A) Increased speed and angle of bank
B) Decrease in altitude
C) Level flight
11. The angle between the chord line and relative airflow is.
A) Angle of incidence
B) Angle of attack
C) Dihedral angle
12. If aspect ratio is low.
A) Lift/Drag ratio is high
B) Lift/Drag ratio is low
C) Drag is zero
13. Which factor affects longitudinal stability.
A) Wing loading
B) Centre of Gravity (CG)
C) Thrust
14. If lift increases, the Centre of Pressure (CP).
A) Moves backward
B) Remains constant
C) Moves forward
15. PSI stands for.
A) Pounds Per Square Inch
B) Pressure Safety Indicator
C) Power System Input
16. The primary control surface for yaw movement is.
A) Rudder
B) Elevator
C) Aileron
17. Lift acts.
A) Horizontally backward
B) Vertically upward
C) Along the wing chord
18. Load Factor means.
A) Actual weight of aircraft
B) Load a/c can sustain / a/c weight
C) Fuel-to-weight ratio
19. If the L/D angle changes from optimum, the path of descent becomes.
A) Level
B) Shallower
C) Steeper
20. Aspect Ratio in subsonic aircraft is usually.
A) High
B) Low
C) Variable
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