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PPL - Principles of Flight > PPL test > Flashcards

PPL test Flashcards

1
Q
  1. What is…..?
    a. Density increases if temperature increases and pressure decreases
    b. Density increases if temperature decreases and pressure is unchanged
    c. Density decreases if temperature is unchanged and pressure increases
    d. Density decreases if temperature is unchanged and pressure decreases
A

d. Density decreases if temperature is unchanged and pressure decreases

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2
Q
  1. What is correct about the dynamic pressure (Q)?
    a. It’s the reading on the air speed indicator corrected for pressure altitude.
    b. It’s the pressure perpendicular to the wind underside.
    c. It’s the pressure (load) acting on all surfaces during a turn.
    d. It’s proportional to the speed squared.
A

d. It’s proportional to the speed squared.

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3
Q
  1. Pick the correct statement:
    a. The static pressure decreases when the dynamic pressure increases if the total pressure is constant.
    b. The static pressure will only act perpendicular to the flow direction.
    c. When flow speed is zero the static pressure is also zero.
    d. The dynamic pressure is zero at and close to the stagnation point if the total pressure is constant.
A

a. The static pressure decreases when the dynamic pressure increases if the total pressure is constant.

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4
Q
  1. What is the correct alternative for describing the airflow over the upper side of a wing profile at different angles of attack?
    a. At a small angle of attack the air flows slightly upwards in front, slightly downwards behind and over the profile with an even speed.
    b. At a small angle of attack the air flows slightly upwards in front, slightly downwards behind and over the profile with an accelerating speed.
    c. At a small angle of attack the air flows slightly upwards in front, slightly upwards behind and over the profile with an accelerating speed.
    d. At a small angle of attack the air flows slightly upwards in front, slightly downwards behind and over the profile with first an accelerating speed then a decelerating speed.
A

d. At a small angle of attack the air flows slightly upwards in front, slightly downwards behind and over the profile with first an accelerating speed then a decelerating speed.

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5
Q
  1. The boundary layer occurs due to:
    a. A fully developed stall
    b. The friction over a surface as air streams over it
    c. The high air temperature
    d. The low air temperature
A

b. The friction over a surface as air streams over it

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6
Q
  1. When flying with a constantly increasing angle of attack you suddenly feel buffeting in the airplane. This means:
    a. The airplane is more sensitive to turbulence
    b. The wing tip vortices have released
    c. The wing has less downwash
    d. The boundary layer over the wing has started to separate
A

d. The boundary layer over the wing has started to separate

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7
Q
  1. At a certain airspeed the margin to stall will:
    a. Decrease if flaps are extended
    b. Increase if load factor is increased
    c. Increase if flaps are retracted
    d. Decrease if load factor is increased
A

d. Decrease if load factor is increased

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8
Q
  1. What is correct about ground effect?
    a. It increases the takeoff roll
    b. The airplane gets a longer flare when landing
    c. It’s created after heavy airplanes taking off or landing
    d. It’s created by increasing thrust from the engine at a low altitude
A

b. The airplane gets a longer flare when landing

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9
Q
  1. For a pitch propeller, which of the following is true?
    a. A propeller designed for climbing has a smaller blade angle than one designed for cruise.
    b. The slipstream has no effect on the airplane during cruise, only in takeoff
    c. A cruise propeller has a lower blade angle than a climb propeller
    d. The blade angle is constant over the entire propeller blade
A

a. A propeller designed for climbing has a smaller blade angle than one designed for cruise.

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10
Q
  1. Ice formation on an airplane wing is very serious because:
    a. The wing can’t handle the increased load factor
    b. The lift created will be too big because the plane is heavier
    c. Due to the extra weight the lift coefficient becomes larger
    d. The stall speed will increase significantly
A

d. The stall speed will increase significantly

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11
Q
  1. How is the lift altered on the right and left wing when banking to the left with different ailerons installed?
    a. The lift increases on the left wing and decreases on the right
    b. The lift decreases on the left wing and increases on the right
    c. The lift decreases on the left wing and is unchanged on the right
    d. The lift only increase on the right wing and is unchanged on the left wing
A

b. The lift decreases on the left wing and increases on the right

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12
Q
  1. Which statement is correct regarding load factor and stall speed increase in a level turn?
    a. 45 degree angle of bank gives 1,6G, stall speed increases with 30%
    b. 60 degree angle of bank gives 2G, stall speed increases with 40%
    c. 70 degree angle of bank gives 3G, stall speed increases with 60%
    d. 85 angle of bank gives 5G, stall speed increases with 100%
A

b. 60 degree angle of bank gives 2G, stall speed increases with 40%

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13
Q
  1. What purpose do stall strips serve?
    a. They reduce drag at high angles of attack
    b. They prevent vortices at specific areas at high angles of attack
    c. They reduce drag when on cruise altitude
    d. They create flow separation at desired areas at relatively high angles of attack
A

d. They create flow separation at desired areas at relatively high angles of attack

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14
Q
  1. Which of the following is correct?
    a. When recovering from spin, initially the ailerons should be held in the opposite direction of rotation and full rudder should be held opposite the rotation
    b. When recovering from spin, initially the ailerons should be held neutral and full rudder should be held opposite the rotation
    c. In a spin the speed drops steadily
    d. How the airplane behaves in a spin is unaffected by centre of gravity position or weight distribution
A

b. When recovering from spin, initially the ailerons should be held neutral and full rudder should be held opposite the rotation
c. In a spin the speed drops steadily

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15
Q
  1. Induced drag
    a. Is the drag created when speed brakes are used on fast airplanes
    b. Is the drag created by vortices between the aircraft fuselage and the wing
    c. Is inversely proportional to the speed squared (DI = 1/V^2)
    d. Can be reduced by increasing the load factor
A

c. Is inversely proportional to the speed squared (DI = 1/V^2)

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16
Q
  1. The stall speed of an aircraft is unaffected by:
    a. Wind strength
    b. Flap setting
    c. Flight condition
    d. Aircraft weight
A

a. Wind strength

17
Q
  1. ??
    a. ??
    b. Increase the stick forces using the elevator
    c. Increase the critical angle of attack
    d. Reduce the stick forces when using the elevator
A

d. Reduce the stick forces when using the elevator

18
Q
  1. The slipstream from a propeller rotating clockwise (as seen from the rear) causes:
    a. The airplane to yaw to the left when increasing rpm
    b. The airplane to yaw to the left when decreasing rpm
    c. The airplane to yaw to the right when increasing rpm
    d. The airplane to roll to the left when decreasing rpm
A

a. The airplane to yaw to the left when increasing rpm

19
Q
  1. If the Centre of Gravity is forward of the most forward limit for flight there’s a risk of:
    a. The aircraft being more difficult to recover from a spin due to reduced rudder effectiveness
    b. The static longitudinal stability becomes worse
    c. The aircraft being more difficult to recover from to spin due to reduced aileron effectiveness
    d. The airplane could become harder to pitch up due to the larger stick forces needed
A

d. The airplane could become harder to pitch up due to the larger stick forces needed

20
Q
  1. If you’re flying with a speed in the yellow speed range in severe turbulence there’s a risk of
    a. The airplane entering a spin
    b. The airplane suffering structural damage
    c. The stability being reduced
    d. The centre of gravity shifting
A

b. The airplane suffering structural damage

21
Q
  1. When increasing speed from 50 to 100kt, how is the parasite drag changed?
    a. Become twice as large
    b. First it becomes twice as large, then it reduces by half
    c. Becomes four times larger
    d. It remains unchanged
A

c. Becomes four times larger

22
Q
  1. What is the coefficient of lift?
    a. A constant value of 1G that is part of the lift formula
    b. CL is a measurement of how much form drag a profile creates
    c. A value that depends on the profile and the angle of attack
    d. It reduces when flying slowly
A

c. A value that depends on the profile and the angle of attack

PPL - Principles of Flight (1 decks)

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