Principles of Flight - ATPL - Airline Transport Pilot license

Question 1

Mach buffet occurs:

Accepted Answer

At the Mach Number at which shockwave induced boundary layer separation occurs.

Answer

When the stalling angle of attack is exceeded.

Answer

Directly after exceeding Mcrit.

Answer

When the Mach Number has increased to Mcrit.

Question 2

The critical Mach Number of an aeroplane can be increased by:

Accepted Answer

Sweep back of the wings.

Answer

Control deflection

Answer

Vortex generators.

Answer

Dihedral of the wings.

Question 3

How does positive camber of an aerofoil affect static longitudinal stability?

Accepted Answer

No effect, because camber of the aerofoil produces a constant pitch down moment coefficient, independent of angle of attack

Answer

Positive effect, because the centre of pressure shifts rearward at increasing angle of attack

Answer

Positive effect, because the lift vector rotates backward at increasing angle of attack

Answer

Negative effect, because the lift vector rotates forward at increasing angle of attack

Question 4

Consider an aeroplane with: 1 a trim tab. 2 fully powered hydraulic controls and an adjustable horizontal stabiliser. For both cases and starting from a trimmed condition, how will the neutral position of the control column change, after trimming for a speed increase?

Accepted Answer

1 moves forward, 2 does not change.

Answer

1 moves forward, 2 moves forward.

Answer

1 does not change, 2 moves forward.

Answer

1 does not change, 2 does not change.

Question 5

In which phase of the take-off is the aerodynamic effect of ice located on the wing leading edge most critical?

Accepted Answer

The last part of the rotation

Answer

All phases of the take-off are equally critical

Answer

During climb with all engines operating

Answer

The take-off run

Question 6

Compared with level flight prior to the stall, the lift (1) and drag (2) in the stall change as follows:

Accepted Answer

(1) decreases (2) increases

Answer

(1) decreases (2) decreases

Answer

(1) increases (2) increases

Answer

(1) increases (2) decreases

Question 7

Regarding flight in severe turbulence, which of the following statements is true?

Accepted Answer

Flight in severe turbulence may lead to a stall and/or structural limitations being exceeded

Answer

Flap extension in severe turbulence at constant speed moves the centre of pressure aft, which increases the structural limitation margins

Answer

By increasing the flap setting in severe turbulence at constant speed the stall speed will be reduced and the risk for exceeding the structural limits will be decreased

Answer

Flap extension in severe turbulence at constant speed increases both the stall speed and the structural limitation margins

Question 8

After take-off the slats (when installed) are always retracted later than the flaps. Why?

Accepted Answer

Because SLATS EXTENDED gives a large decrease in stall speed with relatively less drag

Answer

Because VMCA with SLATS EXTENDED is more favourable compared to the FLAPS EXTENDED situation

Answer

Because SLATS EXTENDED provides a better view from the cockpit than FLAPS EXTENDED

Answer

Because FLAPS EXTENDED gives a large decrease in stall speed with relatively less drag

Question 9

The lift formula is:

Accepted Answer

L= CL 1/2 rho V^2 S

Answer

L= W

Answer

L= n W

Answer

L= CL 2 rho V^2 S

Question 10

Increasing air density will have the following effect on the drag of a body in an airstream (angle of attack and TAS are constant):

Accepted Answer

The drag increases

Answer

The drag decreases

Answer

This has no effect

Answer

The drag is only affected by the ground speed

Exam questions Principles of Flight - ATPL - Airline Transport Pilot license

ATPL - Airline Transport Pilot license: Principles of Flight 10 Questions no time limit

Exam questions Principles of Flight - ATPL - Airline Transport Pilot license

ATPL - Airline Transport Pilot license: Principles of Flight 10 Questions no time limit

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