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

Question 1

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 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

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 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

The ground effect is noticeable by...

Accepted Answer

Lower power requirements

Answer

Strong vertical oscillations

Answer

Strong horizontal vibrations

Answer

Larger power requirements

Question 17

Why is stall region in autorotation important for a PPL(H) flight?

Accepted Answer

It produces drag and does not drive the rotor efficiently.

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 18

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 19

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 20

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 21

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 22

The rotor thrust is...

Accepted Answer

Perpendicular to the tip path plane

Answer

Opposite to the rotation of the rotor blade element

Answer

Parallel with the main rotor shaft

Answer

Perpendicular to the hub plane

Question 23

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 24

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 25

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 26

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 27

Why is effective translational lift important for a PPL(H) flight?

Accepted Answer

It improves rotor efficiency as airflow becomes more horizontal and less recirculated.

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

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 29

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 30

Which action best supports safe management of driven region of the rotor?

Accepted Answer

Balance rotor RPM using 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 31

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

Accepted Answer

Collectively

Answer

Cyclically

Answer

Symmetrically

Answer

Asymmetrically

Question 32

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 33

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 34

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 35

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 36

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 37

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 38

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 39

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 40

Why is driven region of the rotor important for a PPL(H) flight?

Accepted Answer

It consumes energy to produce lift.

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 41

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 42

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 43

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 44

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 45

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 46

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 47

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 48

What aerodynamic effect is most relevant? Density altitude increases.

Accepted Answer

rotor thrust and engine performance margins normally decrease.

Answer

The altimeter setting becomes invalid.

Answer

The magnetic compass becomes the primary lift source.

Answer

The aircraft mass automatically decreases.

Question 49

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 50

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 51

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 52

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 53

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 54

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 55

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 56

The transitional lift can be noticed by...

Accepted Answer

Vibrations.

Answer

An aural warning.

Answer

Strong load factors.

Answer

A loss of engine rpm.

Question 57

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 58

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 59

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 60

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 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

The beam theory enables statements about the...

Accepted Answer

Power requirements during hover flight

Answer

Energy conversion in an autorotation

Answer

Transition lift close to the ground

Answer

Drag in cruise flight

Question 63

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 64

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

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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