Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

Question 1

What action is necessary in a modern helicopter during the transition to a horizontal turn?

Accepted Answer

A control column movement backward or raising the collective

Answer

A control column movement forward or raising the collective

Answer

Open the throttle in a helicopter with a rotor turning in an anti-clockwise direction seen from above

Answer

Open the throttle in a helicopter with a rotor turning in a clockwise direction seen from above

Question 2

The effective airflow velocity of a rotor blade element varies with the distance from the rotor shaft axis, because the...

Accepted Answer

Peripheral speed increases if the displacement to the rotor blade tip decreases-

Answer

Helicopter airframe disturbs the airflow.

Answer

Tangential force and airflow reversal vary.

Answer

Drag force in direction of the rotaion axis is increased.

Question 3

What is the reason for retreating blade stall?

Accepted Answer

Large pitch angle and small effective airflow

Answer

Large centrifugal forces of the peripheral speed

Answer

Small cone angle and constant peripheral speed

Answer

Small pitch angle and large effective airflow

Question 4

Why does a flare during an autorotation generate higher rotor RPM?

Accepted Answer

The vertical airflow through the rotor disc increases

Answer

The pitch angle increases

Answer

The tangential force tilts backwards

Answer

The ground effect leads to better performance

Question 5

Which statement about the required force to change the pitch angle is correct?

Accepted Answer

It must be greater than the tangential force

Answer

It is the smallest by using an advance angle of 90°

Answer

It is the smallest by using a delta-three-hinge

Answer

It must be greater than the rotor disc loading

Question 6

The ground effect is noticeable by...

Accepted Answer

Lower power requirements.

Answer

Strong vertical oscillations.

Answer

Strong horizontal vibrations.

Answer

Larger power requirements.

Question 7

What is the result of the vortex ring state?

Accepted Answer

The sink rate increases uncontrollably

Answer

The helicopter is more stable

Answer

The helicopter loses power

Answer

The rotor RPM increases

Question 8

The airframe of an accelerating helicopter continues to bend until the...

Accepted Answer

Horizontal thrust component equals the drag.

Answer

Thrust passes in front of the centre of gravity.

Answer

Vertical thrust component equals the drag.

Answer

Thrust passes behind the centre of gravity.

Question 9

Which of the stated relationships between lift and drag applies best for a flying helicopter (lift : drag)?

Accepted Answer

45 : 1

Answer

1 : 45

Answer

1 : 2

Answer

2 : 1

Question 10

A helicopter with a rotor turning in an anti-clockwise direction seen from above, hovers sideways to the right. What is the azimuth angle where the main rotor blades have the biggest pitch angle?

Accepted Answer

180°

Answer

270°

Answer

90°

Answer

0°

Quiz Principles of Flight (Helicopter) - PPL(H) - Private Pilot License

Test 10 Questions PPL(H) - Private Pilot License - Principles of Flight (Helicopter), no time limit