Principle of Flight - EASA PPL(A) - Private Pilot License

Question 1

Which statement about the airflow around an aerofoil is correct if the angle of attack decreases?

Accepted Answer

The center of pressure moves aft

Answer

The stagnation point remains constant

Answer

The stagnation point moves down

Answer

The center of pressure moves forward

Question 2

Which option states a benefit of wing washout?

Accepted Answer

At high angles of attack the effectiveness of the aileron is retained as long as possible

Answer

Structurally the wing is made more rigid against rotation

Answer

With the washout the form drag reduces at high speeds

Answer

Greater hardness because the wing can withstand more torsion forces

Question 3

Point number 5 in the figure indicates which flight state? See figure (PFA-008)

Accepted Answer

Slow flight

Answer

Best gliding angle

Answer

Stall

Answer

Inverted flight

Question 4

When extending the flaps for landing at constant angle of attack, in which way does the lift coefficient change far before reaching the maximum lift coefficient?

Accepted Answer

It increases

Answer

It decreases

Answer

It is not possible to define

Answer

It remains constant

Question 5

Compared to trailing edge flaps, leading edge devices like Slots...

Accepted Answer

Produce less drag while allowing a higher angle of attack.

Answer

Reduce the critical angle of attack at a given speed.

Answer

Allow higher speeds at take-off and landing.

Answer

Increase the camber and allow a lower angle of attack.

Question 6

The laminar boundary layer on the aerofoil is located between...

Accepted Answer

The stagnation point and the transition point.

Answer

The transition point and the separation point.

Answer

The transition point and the center of pressure.

Answer

The stagnation point and the center of pressure.

Question 7

The right aileron deflects upwards, the left downwards. How does the aircraft react?

Accepted Answer

Rolling to the right, yawing to the left

Answer

Rolling to the left, no yawing

Answer

Rolling to the right, yawing to the right

Answer

Rolling to the left, yawing to the right

Question 8

In motorplanes the stall warning is usually activated by a change of...

Accepted Answer

The stagnation point.

Answer

The center of gravity.

Answer

The transition point.

Answer

The center of pressure.

Question 9

How is the balance of forces affected during a turn?

Accepted Answer

Lift force must be increased to compensate for the sum of centrifugal and gravitational force

Answer

The net force results from superposition of gravity and centripetal forces

Answer

The horizontal component of the lift force during a turn is the centrifugal force

Answer

A lower lift force compensates for a lower net force as compared to level flight

Question 10

How do lift and drag change when setting flaps to a lower position?

Accepted Answer

Lift increases, drag increases

Answer

Lift increases, drag decreases

Answer

Lift decreases, drag decreases

Answer

Lift decreases, drag increases

Quiz Principle of Flight - EASA PPL(A) - Private Pilot License

Test 10 Questions EASA PPL(A) - Private Pilot License - Principle of Flight, no time limit