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

Question 1

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 2

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 3

Which energies serve to maintain the rotor rpm in an autorotation?

Accepted Answer

Potential or kinetic energy

Answer

Mechanical or chemical energy

Answer

Rotational and linear energy

Answer

Frictional and flow energy

Question 4

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 5

What kind of drag is caused by a lift-producing aerofoil?

Accepted Answer

Induced drag

Answer

Parasite drag

Answer

Frictional drag

Answer

Interference drag

Question 6

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 7

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 8

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 9

Which action best supports safe management of anti-torque demand?

Accepted Answer

Anticipate pedal input when changing collective.

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 10

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 11

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 12

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

Accepted Answer

Collectively

Answer

Cyclically

Answer

Symmetrically

Answer

Asymmetrically

Question 13

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 14

What is the risk arising in a vertical autorotation with a subsequent increase in airspeed prior to the landing?

Accepted Answer

Misjudgement when increasing the airspeed

Answer

High rotor RPM

Answer

Vortex ring state

Answer

Loss of the tail rotor efficiency

Question 15

The rotor RPM is kept constant in the helicopter by the engine RPM. It can be influenced by the...

Accepted Answer

Throttle and the governor

Answer

Cyclic stick

Answer

Starter and the impulse coupling

Answer

Collective

Question 16

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 17

What aerodynamic effect is most relevant? Forward speed approaches the never-exceed speed.

Accepted Answer

retreating blade stall and structural limits become important.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 18

What aerodynamic effect is most relevant? The pilot raises collective rapidly.

Accepted Answer

torque and power required increase.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 19

Which statement about best rate of climb speed is correct?

Accepted Answer

It gives the greatest altitude gain per unit time under the specified conditions.

Answer

It is always zero airspeed.

Answer

It is the speed for minimum fuel flow in every case.

Answer

It is a radio frequency.

Question 20

Which statement about flare in autorotation is correct?

Accepted Answer

It can reduce rate of descent and forward speed before touchdown.

Answer

It is used to stop the rotor immediately.

Answer

It increases sink rate in all cases.

Answer

It replaces rotor RPM control.

Question 21

Which statement about autorotation is correct?

Accepted Answer

The rotor is driven by upward airflow through the rotor disc after power loss or power reduction.

Answer

The rotor is driven by the starter motor throughout descent.

Answer

The rotor brake is applied in flight.

Answer

Lift is produced only by the tail rotor.

Question 22

Which statement about torque reaction is correct?

Accepted Answer

The fuselage tends to rotate opposite to main rotor torque unless balanced.

Answer

It is a GPS position error.

Answer

It affects only gliders.

Answer

It is eliminated by changing QNH.

Question 23

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 24

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 25

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 26

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 27

What aerodynamic effect is most relevant? A skid contacts an obstacle during lift-off.

Accepted Answer

dynamic rollover 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 28

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 29

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 30

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 31

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 32

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 33

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 34

What happens to thrust and tangential force if the rotor RPM decreases by about 10 % in cruise flight?

Accepted Answer

The thrust and the tangential force decrease

Answer

The thrust and the tangential force increase

Answer

The thrust decreases and the tangential force remains constant

Answer

The thrust remains constant and the tangential force increases

Question 35

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 36

The rotor blade shape takes effect on the...

Accepted Answer

Lift distribution

Answer

Rotor head used

Answer

Notch sensitivity

Answer

Structural take-off mass

Question 37

Why is flapping hinge function important for a PPL(H) flight?

Accepted Answer

It allows blade motion that helps balance lift in forward flight.

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 38

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 39

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 40

During hover flight, the induced airflow velocity...

Accepted Answer

Increases further having passed the rotor

Answer

Is equal above and below the rotor

Answer

Remains constant after having passed the rotor

Answer

Decreases after having passed the rotor

Question 41

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 42

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 43

What aerodynamic effect is most relevant? A strong left crosswind affects a helicopter susceptible to LTE.

Accepted Answer

yaw control 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 44

Which action best supports safe management of stall region in autorotation?

Accepted Answer

Avoid excessive collective that expands the stall region.

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 45

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.

Question 46

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 47

What shape of a rotor blade has a positive impact on the lift distribution?

Accepted Answer

Double trapezoidal rotor blade with a radius at the blade tip

Answer

Rectangular blade with a geometric setting of 1°

Answer

Trapezoidal blade without radius at the blade tip

Answer

Rectangular trapezoidal blade with no aerodynamic twist

Question 48

Which action best supports safe management of transverse flow effect?

Accepted Answer

Anticipate it during transition from hover.

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 49

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 50

The helicopter's stability is increased by...

Accepted Answer

Attaching a stabilizer

Answer

Reducing the rotor RPM

Answer

Pivoting the drag hinge

Answer

Decreasing the rotor mass

Question 51

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 52

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 53

Why is tip-path plane important for a PPL(H) flight?

Accepted Answer

It represents the plane traced by the rotor blade tips.

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 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 55

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 56

Why is disc loading important for a PPL(H) flight?

Accepted Answer

It affects induced velocity and hover 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 57

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 rotation axis is increased

Question 58

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 59

What aerodynamic effect is most relevant? The helicopter enters a steep flare in autorotation.

Accepted Answer

rotor RPM may increase and must be controlled.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 60

Which statement about blade flapping is correct?

Accepted Answer

It helps compensate for dissymmetry of lift.

Answer

It prevents all rotor RPM changes.

Answer

It is used only for braking after shutdown.

Answer

It is unrelated to forward flight.

Question 61

What force affects the braking torque of the rotor in cruise?

Accepted Answer

Inclined rearward tangential force

Answer

Inclined forward lift

Answer

Upward directional rotor thrust

Answer

Inclined forward drag force

Question 62

What is the purpose of the vertical stabilizer?

Accepted Answer

Improvement of directional stability

Answer

Adjustment of longitudinal stability

Answer

Compensation of tail rotor stability

Answer

Reduction of manoeuvre stability

Question 63

Which statement about cyclic pitch is correct?

Accepted Answer

It tilts the rotor disc to control movement around pitch and roll axes.

Answer

It changes all blade pitch equally.

Answer

It controls fuel flow only.

Answer

It is used only after shutdown.

Question 64

Why do helicopters with a semi-rigid rotor system react slower than others?

Accepted Answer

The central flapping hinge does not transmit any moments

Answer

The missing lag hinges cause a rotor imbalance

Answer

The lowered attachment of the rotor blades allows a transmission of forces

Answer

The angled lag hinges prevent the transmission of aerodynamic forces on the helicopter frame

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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