Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

Question 1

What effect is referred to as "adverse yaw"?

Accepted Answer

Aileron operation results in a yaw to the opposite side due to more drag at the down-deflected aileron

Answer

Aileron operation results in a yaw to the desired side due to less drag at the down-deflected aileron

Answer

Rudder operation results in a rolling moment to the opposite side due to more lift generated by the faster moving wing.

Answer

Aileron operation results in a yaw to the opposite side due to more drag at the up-deflected aileron

Question 2

During a stall, the lift...

Accepted Answer

Decreases and drag increases.

Answer

Increases and drag increases.

Answer

Decreases and drag decreases

Answer

Increases and drag decreases.

Question 3

"Longitudinal stability" is referred to as stability around which axis?

Accepted Answer

Lateral axis

Answer

Propeller axis

Answer

Longitudinal axis

Answer

Vertical axis

Question 4

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 left, yawing to the right

Answer

Rolling to the right, yawing to the right

Question 5

Stability around which axis is mainly influenced by the center of gravity's longitudinal position?

Accepted Answer

Lateral axis

Answer

Longitudinal axis

Answer

Gravity axis

Answer

Vertical axis

Question 6

Which effect does a decreasing airspeed have on the induced drag during a horizontal and stable cruise flight?

Accepted Answer

The induced drag will increase

Answer

The induced drag will slightly decrease

Answer

The induced drag will collapse

Answer

The induced drag will remain constant

Question 7

Which of the listed wing shapes has the lowest induced drag?

Accepted Answer

Elliptical shape

Answer

Rectangular shape

Answer

Trapezoidal shape

Answer

Double trapezoidal shape

Question 8

Rotation around the lateral axis is called...

Accepted Answer

Pitching.

Answer

Yawing.

Answer

Rolling.

Answer

Stalling.

Question 9

What is meant by "ground effect"?

Accepted Answer

Increase of lift and decrease of induced drag close to the ground

Answer

Decrease of lift and increase of induced drag close to the ground

Answer

Increase of lift and increase of induced drag close to the ground

Answer

Decrease of lift and decrease of induced drag close to the ground

Question 10

In a co-ordinated turn, how is the relation between the load factor (n) and the stall speed (Vs)?

Accepted Answer

N is greater than 1, Vs is greater than in straight and level flight.

Answer

N is smaller than 1, Vs is greater than in straight and level flight.

Answer

N is greater than 1, Vs is smaller than in straight and level flight.

Answer

N is smaller than 1, Vs is smaller than in straight and level flight.

Quiz Principles of Flight (Aeroplane) - SPL - Sailplane Pilot License

Test 10 Questions SPL - Sailplane Pilot License - Principles of Flight (Aeroplane), no time limit