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

Question 1

The virtual rotation axis of a rotor is...

Accepted Answer

Perpendicular to the tip path plane

Answer

Perpendicular to the hub plane

Answer

Parallel with the main rotor shaft

Answer

Perpendicular to the plane which contains the swash plate

Question 2

What is the usual trade-off when helicopter stability is increased?

Accepted Answer

Reduced manoeuvrability and controllability.

Answer

A decrease in general aviation safety.

Answer

An increase in maximum permitted helicopter mass.

Answer

Improved control under negative load factors.

Question 3

Which statement about collective pitch is correct?

Accepted Answer

It changes the pitch of all main rotor blades together.

Answer

It changes only compass heading.

Answer

It tilts the rotor disc without changing blade pitch.

Answer

It controls radio volume.

Question 4

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 5

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 6

Which action best supports safe management of disc loading?

Accepted Answer

Consider mass and rotor disc area when assessing performance.

Answer

Delay the decision until after take-off.

Answer

Use the item only if requested by passengers.

Answer

Ignore it when the helicopter has sufficient fuel.

Question 7

What relieves the helicopter in a low G manoeuvre?

Accepted Answer

Increased vertical airflow through the rotor

Answer

Weightlessness of the passengers during the push over

Answer

Rolling movement of the helicopter to the right

Answer

Centrifugal force in parabolic flight during the entire manoeuvre

Question 8

The pitch angle of a tail rotor blade is changed...

Accepted Answer

Collectively

Answer

Cyclically

Answer

Symmetrically

Answer

Asymmetrically

Question 9

If the critical angle of attack is exceeded, the...

Accepted Answer

Boundary layer on the upper side of the rotor blade begins to separate

Answer

Transition point starts moving towards the airflow direction

Answer

Boundary layer on the lower side of the rotor blade begins to separate

Answer

Laminar boundary layer turns into a turbulent boundary layer

Question 10

Why does a stall begin on the retreating rotor blade at high cruise speeds?

Accepted Answer

The large pitch angle and relatively low peripheral speed cause a large effective angle of attack

Answer

The airflow reaches subsonic speed and causes an increase of the induced drag

Answer

The small pitch angle and a relatively low peripheral speed cause a small effective angle of attack

Answer

The airflow reaches supersonic speed and causes an increase of the parasite drag

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

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

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

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

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