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

Question 1

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 2

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 3

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 4

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 5

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 6

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 7

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 8

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 9

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 10

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 11

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 12

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 13

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 14

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 15

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 16

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 17

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 18

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 19

The ground effect is noticeable by...

Accepted Answer

Lower power requirements

Answer

Strong vertical oscillations

Answer

Strong horizontal vibrations

Answer

Larger power requirements

Question 20

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 21

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 22

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 23

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 24

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 25

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 26

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 27

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 28

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 29

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 30

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 31

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 32

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 33

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 34

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 35

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 36

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 37

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 38

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 39

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 40

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 41

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 42

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 43

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 44

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 45

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 46

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 47

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 48

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 49

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 50

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 51

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 52

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 53

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 54

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 55

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 56

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 57

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 58

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 59

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 60

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 61

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 62

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 63

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 64

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.

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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