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

Question 1

During an autorotation with forward speed of a helicopter the driving forces are located in the...

Accepted Answer

Region of the retreating rotor blade.

Answer

Inner region.

Answer

Outer region.

Answer

Region of the advancing rotor blade.

Question 2

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 3

Which action best supports safe management of tail rotor drift?

Accepted Answer

Anticipate drift during hover and lift-off.

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 4

Which movement is caused by the Coriolis effect on the advancing rotor blade?

Accepted Answer

Drag movement forwards

Answer

Mass movement outwards

Answer

Tilt movement backwards

Answer

Flapping downwards

Question 5

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 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

Vx is the speed...

Accepted Answer

For the best angle of climb

Answer

For the best rate of climb

Answer

To rotate

Answer

Never to be exceeded

Question 8

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 9

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 10

Which action best supports safe management of hover ceiling?

Accepted Answer

Check performance data before operating near 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 11

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 12

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

Accepted Answer

Collectively

Answer

Cyclically

Answer

Symmetrically

Answer

Asymmetrically

Question 13

Which action best supports safe management of autorotative region?

Accepted Answer

Manage airspeed and collective to keep rotor RPM within 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 14

What types of airflow can be observed around a rotor blade aerofoil?

Accepted Answer

Laminar airflow at the leading edge, turbulent airflow further back

Answer

Laminar airflow on the entire upper surface

Answer

Turbulent airflow at the leading edge, laminar airflow further back

Answer

Turbulent airflow on the entire upper surface

Question 15

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 16

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 17

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 18

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 19

Which statement about rotor RPM decay is correct?

Accepted Answer

It can reduce lift and control margin and must be corrected promptly.

Answer

It increases lift indefinitely.

Answer

It is corrected by raising collective in every case.

Answer

It is unrelated to safety.

Question 20

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 21

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 22

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 23

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

Accepted Answer

It reduces the pilot-in-command's workload.

Answer

It increases the required control forces in all manoeuvres.

Answer

It improves control under all load factors.

Answer

It increases the maximum permitted helicopter mass.

Question 24

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 25

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 26

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 27

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 28

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 29

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 30

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 31

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 32

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 33

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 34

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 35

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 36

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 37

What is the advantage of a turbulent airflow compared to a laminar airflow at an aerofoil with a high angle of attack?

Accepted Answer

It adheres to the aerofoil for a longer time

Answer

It has a thinner boundary layer

Answer

It has no form drag

Answer

The separation point moves further forward

Question 38

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 39

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 40

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 41

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 42

The ground effect is noticeable by...

Accepted Answer

Lower power requirements

Answer

Strong vertical oscillations

Answer

Strong horizontal vibrations

Answer

Larger power requirements

Question 43

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 44

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 45

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 46

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 47

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 48

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 49

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 50

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 51

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

Question 52

Which statement about settling with power is correct?

Accepted Answer

It is associated with vortex ring state conditions.

Answer

It means the engine has failed completely.

Answer

It is caused by excessive QNH.

Answer

It improves climb performance.

Question 53

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 54

Why is autorotative region important for a PPL(H) flight?

Accepted Answer

It helps drive the rotor during autorotation.

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 55

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 56

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 57

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 58

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 59

The maximum range in an autorotation will be achieved by...

Accepted Answer

A relatively high effective angle of attack.

Answer

A relatively low effective angle of attack.

Answer

A neutral effective angle of attack.

Answer

A negative effective angle of attack.

Question 60

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 61

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 62

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 63

What can be expected during a hover flight in ground effect within a forest glade?

Accepted Answer

Recirculation of air masses and an impairment of the ground effect

Answer

Useful ground effect caused by a smaller induced airflow

Answer

No air turbulence through the slipstream and stable attitude

Answer

Aspiration of the tail rotor in the direction of the forest and a performance gain

Question 64

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.

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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