Module -8 Final Practice Exam (Basic Aerodynamics 20 Questions 25 Mints)

Module - 8 (Basic Aerodynamics)

Final Practice Exam Test

  

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1. The uppermost layer of the atmosphere is ?
   1.   Troposphere
   2.   Mesosphere
   3.   Thermosphere
2. Which type of drag is directly proportional to airspeed squared ?
   1.   Profile drag
   2.   Form drag
   3.   Induced drag
3. What is the main purpose of a vortex generator ?
   1.   Increase aircraft weight
   2.   Delay flow separation
   3.   Reduce drag by streamlining flow
4. What approximate percentage of oxygen is in the atmosphere?
   
   1.   31%
   2.   21%
   3.   12%
5. Which type of flow is characterized by smooth, parallel layers of air ?
   1.   Vortex flow
   2.   Laminar flow
   3.   Turbulent flow
6. What is Bernoulli’s principle primarily used to explain in aerodynamics?
   1.   Aircraft stability
   2.   Lift generation
   3.   Engine thrust
7. Aerofoil efficiency is defined by ?
   1.   drag over lift
   2.   lift over weight
   3.   lift over drag
8. What is the critical angle of attack ?
   1.   The angle at which drag is minimized
   2.   The best climb angle
   3.   The maximum angle before a stall occurs
9. The function of an aircraft fin is ?
   1.   is to provide directional control
   2.   is to provide straight airflow across the rudder
   3.   is to provide stability about the normal axis
10. Angle of incidence is the angle between the chord line of the wing and ?
    1.   the vertical axis of the aircraft
    2.   the lateral axis of the aircraft
    3.   the longitudinal axis of the aircraft
11. What happens to the stall speed when flaps are deployed ?
    1.   Remains the same
    2.   Increases
    3.   Decreases
12. Dutch roll is a coupled ………. Oscillation ?
    1.   Lateral/Longitudinal
    2.   Lateral/Directional
    3.   Longitudinal/Directional
13. The aircraft is in a state of equilibrium if ?
    1.   lift=weight
    2.   weight=thrust
    3.   lift=drag
14. Longitudinal stability is provided by the ?
    1.   mainplane
    2.   vertical stabilizer
    3.   horizontal stabilizer
15. Turbulence and skin friction are controlled mainly by the -----------------?
    1.   glide ratio
    2.   aspect ratio
    3.   fineness ratio
16. Yawing is a rotation around ?
    
    1.   the normal axis obtained by the rudder
    2.   the normal axis obtained by the elevator
    3.   the lateral axis obtained by the rudder
17. What is the primary factor affecting an airfoil’s lift ?
    1.   Angle of attack
    2.   Winglets
    3.   Camber
18. Which statement is true regarding lift and weight of an aircraft ?
    1.   Lift acts at right angles to the wing chord line and weight acts vertically down
    2.   Lift acts at right angles to the relative airflow and weight acts vertically down
    3.   Lift acts at right angles to the relative air flow and weight acts at right angles to the aircraft centre line
19. When the angle of attack decreases the centre of lift moves ?
    
    1.   Aft
    2.   Forward
    3.   Not moves
20. Which of the following statements about Mach number is true ?
    1.   It is the ratio of true airspeed to the speed of sound
    2.   It is the ratio of lift to drag
    3.   It is the ratio of induced drag to parasitic drag