M8 Basic Aerodynamics Sub-Module No 4 (Quiz No 1)

 

8.4 Flight Stability and Dynamics

Quiz

 

1. If the aircraft’s speed decreases, As a result of this decreased flow of air over the wing, the downwash is ?
   1.   reduced
   2.   inceased
   3.   produced
2. An aircraft always has the tendency to turn the………... of the aircraft into the relative wind ?
   1.   Right wing
   2.   Lateral axis
   3.   Longitudinal axis
3. The term "Passive Stability" refers to a situation in which the vehicle is naturally ?
   1.   Stable
   2.   Unstable
   3.   Dynamic
4. When the angle of attack decreases the centre of lift moves ?
   1.   Forward
   2.   Aft
   3.   Not moves
5. The aircraft designer must ensure …….. directional stability ?
   1.   Negative
   2.   Positive
   3.   Forward
6. Stability about the aircraft’s vertical axis is called ?
   1.   Lateral stability
   2.   Longitudinal stability
   3.   Yawing stability
7. The most easily achieved stability in aircraft design is ?
   1.   Lateral stability
   2.   Yawing stability
   3.   Longitudinal stability
8. The ………. provides a stable contribution depending on the amount of sweep back ?
   1.   Upper wing
   2.   Lower wing
   3.   Swept wing
9. Longitudinal stability is about ?
   1.   Lateral axis
   2.   Longitudinal axis
   3.   Normal axis
10. Sweepback is an addition to the dihedral that increases the ……..created when a wing drops from the level position ?
    1.   Drag
    2.   lift
    3.   Turbulant air

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M8 Basic Aerodynamics Sub-Module No 3 (Quiz No :1)

 

8.3 Theory of Flight

Quiz

 

1. The aircraft is in a state of equilibrium if ?
   1.   lift=drag
   2.   weight=thrust
   3.   lift=weight
2. If the aircraft were in a bank it would be apparent that lift acts in the direction of the ?
   1.   turn
   2.   bank
   3.   weight
3. The critical AOA varies from 16° to 20° depending on the aircraft’s ?
   1.   Speed
   2.   Angle of Incidence
   3.   Design
4. Critical AOA varies from_______depending on the aircraft’s design ?
   1.   16° to 20°
   2.   12° to 16°
   3.   2° to 4°
5. These are small airfoil sections usually attached to the upper surface of a wing ?
   1.   Fowler flaps
   2.   Vortex generators
   3.   The slot
6. As the airspeed decreases, to retain the lift required for maintaining altitude ?
   1.   the AOA must remain same
   2.   the AOA must be decreased
   3.   the AOA must be increased
7. The center of gravity (CG) may be considered as a point at which all the … of the aircraft is concentrated ?
   1.   mass
   2.   weight
   3.   load
8. It is a very prominent force acting on the gliding distance of the airplane in relationship to its movement over the ground ?
   1.   weight
   2.   wind
   3.   drag
9. When descending at a speed above best glide speed, parasite drag is ?
   1.   same
   2.   decreases
   3.   increases
10. Parasite drag is the sum of pressure and friction drag and as defined, is ?
    1.   independent of lift
    2.   dependent of lift
    3.   negative lift

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M8 Basic Aerodynamics Sub-Module No 2(Quiz No :1)

8.2 Aerodynamics

Quiz

 

1. Bernoulli’s principle states that when a fluid (air) flowing through a tube reaches a constriction, or narrowing, of the tube, the speed of the fluid flowing through that constriction -------and its pressure ---------?
   1.   increases, decreases
   2.   decreases, increases
   3.   increases, remains constant
2. lift can be increased by ?
   1.   increasing the angle of attack, wing area, velocity, density of the air
   2.   changing the shape or size of the airfoil
   3.   Both are Correct
3. Angle of incidence is the angle between the chord line of the wing and ?
   1.   the longitudinal axis of the aircraft
   2.   the lateral axis of the aircraft
   3.   the vertical axis of the aircraft
4. Which of the following forces act on an aircraft in level flight ?
   1.   Lift, drag, thrust
   2.   Lift, thrust, and weight
   3.   Lift, thrust, weight, and drag
5. The CP moves ______ with increasing AOA and _______ as the AOA decreases ?
   1.   Rearward, Forward
   2.   Forward, Rearward
   3.   Remains Constant
6. The take off lift coefficient will be value ?
   1.   from 5 to 25 percent at CL max%
   2.   from 5 to 10 percent at CL max %
   3.   from 90 to 65 percent at CL max %
7. Ice commonly changes the shape of the ?
   1.   airfoil
   2.   boundary layer
   3.   chord
8. As air flows over the upper cambered surface of an aerofoil, what happens with velocity and pressure ?
   1.   Velocity increases, pressure increases
   2.   Velocity increases, pressure decreases
   3.   Velocity decreases, pressure decreases
9. The point of intersection of the resultant force line with the chord line of the airfoil is called the ?
   1.   center of gravity(CG)
   2.   angle of attack (AOA
   3.   center of pressure (CP)
10. A high aspect ratio wing will give ?
    1.   low profile and low induced drag
    2.   high profile and low induced drag
    3.   low profile and high induced drag

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