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

Question 1

Without corrective moves, a helicopter hovering in ground effect in no-wind conditions, will execute...

Accepted Answer

Slight upward and downward movements

Answer

Pitching motion about the centre

Answer

Fast yaw motions

Answer

Rolling movements to about 60°

Question 2

Which action best supports safe management of blade pitch increase?

Accepted Answer

Monitor rotor RPM and engine limits.

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 3

Which statement about profile drag is correct?

Accepted Answer

It is associated with the rotor blade moving through the air.

Answer

It is caused only by radio antennas.

Answer

It disappears when blade pitch increases.

Answer

It is unrelated to rotor speed.

Question 4

What is the reason for the driving forces in an autorotation?

Accepted Answer

Downward tilted effective airflow

Answer

Low rate of descent

Answer

Increased pitch angle

Answer

High airspeeds

Question 5

What aerodynamic effect is most relevant? The helicopter accelerates through effective translational lift.

Accepted Answer

less power may be required for the same lift.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 6

Which of the following options has an effect on the autorotation characteristics?

Accepted Answer

Helicopter mass and density altitude

Answer

Smoothly working tail rotor control and low RPM warning systems

Answer

Air temperature and wind speed

Answer

Pressure altitude and wind speed

Question 7

Which action best supports safe management of flapping hinge function?

Accepted Answer

Understand its role in rotor dynamics.

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 8

Which statement about ground effect is correct?

Accepted Answer

It reduces induced flow and power required when hovering close to the surface.

Answer

It increases power required compared with OGE hover.

Answer

It is strongest at high altitude cruise.

Answer

It affects only fixed-wing aircraft.

Question 9

What is the correct way to counteract the vortex ring state?

Accepted Answer

Try to gain airspeed and enter autorotation

Answer

Raise collective and decrease rotor RPM

Answer

Raise collective and pull back the stick

Answer

Open throttle and pull back the stick

Question 10

Which statement about retreating blade stall is correct?

Accepted Answer

It is associated with high forward speed, high gross mass, turbulence or high density altitude.

Answer

It occurs only while parked.

Answer

It affects only the advancing blade first.

Answer

It is prevented by exceeding VNE.

Question 11

Which statement about coning is correct?

Accepted Answer

It is the upward bending of rotor blades due to lift and centrifugal force balance.

Answer

It is a radio navigation procedure.

Answer

It is caused by altimeter error.

Answer

It is the same as tail rotor drift.

Question 12

Which option describes the term "asymmetric airflow"?

Accepted Answer

During cruise flight the advancing rotor blade has more airflow than the retreating rotor blade

Answer

The displacement of the driving forces to the advancing rotor blade in a vertical autorotation

Answer

The difference in required performance during hover in and out of ground effect

Answer

The greater lift in the outer region of the rotor as opposed to the inner region

Question 13

The neutral point is a point where...

Accepted Answer

The torque at the chord line remains constant for changing angles of attack

Answer

The aerodynamic forces act torque-free

Answer

The imaginary axes of a helicopter meet each other

Answer

The entire helicopter mass can be assumed to attack

Question 14

What aerodynamic effect is most relevant? The helicopter hovers out of ground effect on a hot day.

Accepted Answer

power margin may be reduced.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 15

During an autorotation the airspeed is limited by...

Accepted Answer

The drift of the driving forces on the returning blade

Answer

The displacement of the stall regions in the inner area of the rotor blade

Answer

The interference drag during low rates of descent

Answer

The landing gear during the touchdown

Question 16

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 17

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°

Question 18

What aerodynamic effect is most relevant? The helicopter descends vertically with power and low airspeed.

Accepted Answer

vortex ring state risk may increase.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 19

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 20

Which statement about the rotor disc loading in a horizontal curve is correct?

Accepted Answer

It increases with increasing bank angle

Answer

It decreases with increasing bank angle

Answer

No change in relation to the cruise flight

Answer

Effects depend on the type of helicopter

Question 21

Which statement about induced drag is correct?

Accepted Answer

It is associated with producing lift.

Answer

It is caused only by wheel brakes.

Answer

It decreases to zero in all climbs.

Answer

It is a magnetic compass error.

Question 22

During an autorotation a helicopter accelerates from 60 to 90 knots without further corrections. The rotor RPM will...

Accepted Answer

Decrease.

Answer

Remain constant.

Answer

Vary.

Answer

Increase.

Question 23

Which statement about dynamic rollover is correct?

Accepted Answer

It can develop when the helicopter pivots around a skid or wheel with rolling moment.

Answer

It occurs only at high altitude cruise.

Answer

It is impossible on sloping ground.

Answer

It is prevented by increasing collective rapidly.

Question 24

Why are the stability criteria of a helicopter very important?

Accepted Answer

A lack of stability may lead to loss of control

Answer

Low stability reduces the available control forces

Answer

High stability prevents low load factors

Answer

Large stability increases the maximum take-off mass

Question 25

Which statement about translational lift is correct?

Accepted Answer

It improves rotor efficiency as the helicopter moves into cleaner horizontal airflow.

Answer

It occurs only when stationary in a hover.

Answer

It reduces all lift instantly.

Answer

It is a radio navigation term.

Question 26

Why is anti-torque demand important for a PPL(H) flight?

Accepted Answer

It generally increases as power and torque increase.

Answer

It is relevant only to airline transport operations.

Answer

It can be ignored when the flight remains local.

Answer

It is replaced by passenger preference.

Question 27

Which statement about mast bumping is correct?

Accepted Answer

It is a hazard associated with some teetering rotor systems under low-G or abrupt control conditions.

Answer

It is an altimeter calibration method.

Answer

It occurs only after shutdown.

Answer

It is solved by applying rotor brake in flight.

Question 28

Which statement about LTE is correct?

Accepted Answer

Loss of tail rotor effectiveness is an uncommanded yaw condition that can occur in susceptible conditions.

Answer

It is a type of VOR radial.

Answer

It improves hover controllability.

Answer

It is prevented by ignoring wind direction.

Question 29

What aerodynamic effect is most relevant? Rotor RPM starts to decay in autorotation.

Accepted Answer

collective should be managed to recover RPM.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 30

Why is a helicopter's climb initially accelerated after an increase of the pitch angle?

Accepted Answer

The inertia of the air increases the effective angle of attack temporarily until an additional component of the climb rate reduces the effective angle of attack again

Answer

The larger pitch angle causes a decrease and a compression of the airflow until the climb rate corresponds to the induced velocity through the main rotor disc

Answer

The initially high airflow increases the rotor thrust until the lower air density reduces the rotor thrust again

Answer

The conversion of energetic air into kinetic rotor energy decreases continuously with increasing density altitude

Question 31

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 32

The ground effect is noticeable by...

Accepted Answer

Lower power requirements

Answer

Strong vertical oscillations

Answer

Strong horizontal vibrations

Answer

Larger power requirements

Question 33

Which statement about high gross mass is correct?

Accepted Answer

It increases power required and can reduce performance margins.

Answer

It always lowers power required.

Answer

It eliminates retreating blade stall risk.

Answer

It has no effect on hover ceiling.

Question 34

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 35

The induced airflow on the rotor of a helicopter in level flight has the greatest value at the...

Accepted Answer

Rear rotor area

Answer

Advancing rotor blade

Answer

Retreating rotor blade

Answer

Front rotor area

Question 36

The effective angle of attack is the angle between...

Accepted Answer

Effective airflow and chord line

Answer

Chord line and tip path plane

Answer

Tip path plane and rotor blade

Answer

Effective airflow and tip path plane

Question 37

The drive system of the autogyro's main rotor is based on...

Accepted Answer

The speed of the airflow.

Answer

A fan in the cabin.

Answer

An engine in the cabin.

Answer

An engine at the rotor blade tip

Question 38

Which statement about dissymmetry of lift is correct?

Accepted Answer

It is caused by different relative airflow on advancing and retreating blades in forward flight.

Answer

It occurs only in hover with no wind.

Answer

It is caused by QNH error.

Answer

It is a type of carburettor icing.

Question 39

What action has no effect on the rotor RPM in an autorotation?

Accepted Answer

Utilisation of friction brake.

Answer

Centre of gravity displacement.

Answer

Pitch angle change.

Answer

Transition into a turning flight.

Question 40

What behaviour does a helicopter without stabilization systems show after external disturbances in a hover, without a corrective action?

Accepted Answer

Statically stable and dynamically instable

Answer

Statically stable and dynamically stable

Answer

Statically indifferent and dynamically instable

Answer

Statically stable and dynamically indifferent

Question 41

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 42

After entering an autorotation a large helicopter mass leads to...

Accepted Answer

A rapid build-up of the rotor RPM

Answer

A rapid collapse of the rotor RPM

Answer

A large change in centre of gravity

Answer

A small rate of descent in a vertical autorotation

Question 43

Which statement about VNE is correct?

Accepted Answer

It is the never-exceed speed and must not be exceeded.

Answer

It is a recommended minimum hover speed.

Answer

It is the same as best endurance speed.

Answer

It applies only to ATC clearances.

Question 44

Which statement about vortex ring state is correct?

Accepted Answer

It can occur with high rate of descent, low forward speed and power applied.

Answer

It occurs only with the engine stopped.

Answer

It is prevented by increasing collective indefinitely.

Answer

It is a compass turning error.

Question 45

Vy is the speed...

Accepted Answer

For the best rate of climb

Answer

To rotate

Answer

For the best angle of climb

Answer

Never to be exceeded

Question 46

What shall be considered before terminating a turn in an autorotation?

Accepted Answer

The pitch angle must be decreased by using the collective pitch lever again

Answer

The Coriolis force causes an increase in the main rotor rpm

Answer

The decreasing gravity relieves the main rotor and the helicopter cabin

Answer

The flight velocity shall be increased to obtain all the kinetic energy

Question 47

Which action best supports safe management of effective translational lift?

Accepted Answer

Expect performance and attitude changes during acceleration.

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 48

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 49

What is the effect of vortex ring state?

Accepted Answer

High rate of descent and irregular pitch, roll, and yaw motions

Answer

Stable descent and high-frequency vibrations in the helicopter

Answer

Decreased rate of descent and strong vibrations from the engine

Answer

Fluctuations in rotor and engine RPM

Question 50

Why is hover ceiling important for a PPL(H) flight?

Accepted Answer

It depends on mass, density altitude, wind and power available.

Answer

It is relevant only to airline transport operations.

Answer

It can be ignored when the flight remains local.

Answer

It is replaced by passenger preference.

Question 51

Which statement about tail rotor thrust is correct?

Accepted Answer

It balances main rotor torque and provides yaw control.

Answer

It provides all vertical lift.

Answer

It measures density altitude.

Answer

It replaces cyclic control.

Question 52

What needs to be observed in conjunction with a temporary loss of tail rotor efficiency in a stationary hover?

Accepted Answer

Vortex ring state of the tail rotor

Answer

Rotating movement in the main rotor direction

Answer

Loss of the main rotor thrust

Answer

Mechanical blockage of the control

Question 53

Why is tail rotor drift important for a PPL(H) flight?

Accepted Answer

Sideways force may require cyclic correction in hover.

Answer

It is relevant only to airline transport operations.

Answer

It can be ignored when the flight remains local.

Answer

It is replaced by passenger preference.

Question 54

What causes the phase lag between the displacement and the flapping of a rotor blade?

Accepted Answer

Inertia, mass, and aerodynamic forces

Answer

Rounding of the rotor blade tips

Answer

Friction in the rotor blade spindles

Answer

Advance or retreat angle of 90°

Question 55

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

Question 56

What is the main safety effect of increased stability in a helicopter?

Accepted Answer

It improves general flight safety.

Answer

It increases the maximum permitted helicopter mass.

Answer

It improves control under negative load factors.

Answer

It always reduces the required control forces.

Question 57

Which factor affects the available response time to initiate an autorotation after engine failure?

Accepted Answer

Inertia of the main rotor system

Answer

Movement of the pressure point

Answer

Functionality of the coupling

Answer

Profile shape of the rotor blades

Question 58

A delta-three hinge is used to allow...

Accepted Answer

For a decreased pitch angle at an upwards flapping blade

Answer

The advancing blade to flap up about the hinge

Answer

The advancing blade to lead about the hinge

Answer

The advancing blade to drag about the hinge

Question 59

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 60

The reason for a stall at a given pitch angle can be...

Accepted Answer

Smaller vertical airflow through the rotor and constant peripheral speed

Answer

Constant peripheral speed and great vertical airflow through the rotor

Answer

Smaller effective angle of attack and small peripheral speed

Answer

Smaller frontal resistance and turbulent airflow

Question 61

Why is blade pitch increase important for a PPL(H) flight?

Accepted Answer

It increases angle of attack and power required.

Answer

It is relevant only to airline transport operations.

Answer

It can be ignored when the flight remains local.

Answer

It is replaced by passenger preference.

Question 62

Which action best supports safe management of tip-path plane?

Accepted Answer

Use cyclic to tilt it for control.

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 63

Which ratio corresponds to the rotor disc loading?

Accepted Answer

Helicopter mass / rotor disc

Answer

Rotor disc / helicopter mass

Answer

Rotor thrust / rotor disc

Answer

Rotor disc / rotor thrust

Question 64

Which statement about lift on a rotor blade is correct?

Accepted Answer

It depends on airflow, aerofoil shape, angle of attack and air density.

Answer

It is independent of angle of attack.

Answer

It is produced only by the tail rotor.

Answer

It increases when air density becomes zero.

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

Exam simulation PPL(H) Exam Question Bank Principles of Flight (Helicopter) 120 questions on 120 minutes

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

Exam simulation PPL(H) Exam Question Bank Principles of Flight (Helicopter) 120 questions on 120 minutes

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