Exam quiz Aircraft General Knowledge - PPL(H) - Private Pilot License

Question 1

How can the belts of a belt clutch be tightened?

Accepted Answer

Increase of drive shaft distance

Answer

Approximation of two rotating plates

Answer

Increase of engine RPM

Answer

Extension of a pneumatic cylinder

Question 2

A gyro which is rotating in space responds to forces being applied to it by an evasive movement...

Accepted Answer

At an angle of 90° to the force being applied.

Answer

At an angle of 45° to the force being applied.

Answer

In a northern direction.

Answer

At an angle of 180° to the force being applied.

Question 3

What needs to be considered if permissible limitations were exceeded?

Accepted Answer

The helicopter must be inspected by a qualified engineer before the next flight

Answer

The helicopter must be subjected to a duplicate inspected by two engineers

Answer

The helicopter must be inspected by the pilot in command and if no defect is found, no appropriate entry in the aircraft technical log is necessary

Answer

The helicopter must be inspected by at least two pilots licensed on the type, one of whom must be the pilot in command

Question 4

How can the pitch angle on a helicopter's rotor blade be controlled?

Accepted Answer

By control rods

Answer

By electrical impulses

Answer

By electric motors

Answer

By cam rods

Question 5

An aircraft in the northern hemisphere intends to turn on the shortest way from a heading of 270° to a heading of 360°. At approximately which indication of the magnetic compass should the turn be terminated?

Accepted Answer

330°

Answer

030°

Answer

270°

Answer

360°

Question 6

The indication of a magnetic compass deviates from magnetic north direction due to what errors?

Accepted Answer

Deviation, turning and acceleration errors

Answer

Gravity and magnetism

Answer

Inclination and declination of the earth's magnetic field

Answer

Variation, turning and acceleration errors

Question 7

What is necessary for the determination of speed (IAS) by the airspeed indicator?

Accepted Answer

The difference betweeen the total pressure and the static presssure

Answer

The difference between the dynamic pressure and the static pressure

Answer

The difference between the total pressure and the dynamic pressure

Answer

The difference between the standard pressure and the total pressure

Question 8

Which of the stated materials shows the highest strength?

Accepted Answer

Carbon fiber re-inforced plastic

Answer

Aluminium

Answer

Magnesium

Answer

Wood

Question 9

The term "static pressure" is defined as pressure...

Accepted Answer

Of undisturbed airflow.

Answer

Sensed by the pitot tube.

Answer

Resulting from orderly flow of air particles.

Answer

Inside the airplane cabin.

Question 10

What must be considered if the alternator fails in a helicopter?

Accepted Answer

No change as long as the battery provides enough power

Answer

The engine runs roughly and is prone to knocking

Answer

Only high power consumers will failing

Answer

All instruments and warning systems will fail

Question 11

What happens to a helicopter during cruise when the stick is moved forward without other corrections?

Accepted Answer

The speed increases and the sink rate increases

Answer

The speed decreases and the sink rate decreases

Answer

The speed decreases and the sink rate increases

Answer

The speed increases and the sink rate decreases

Question 12

Which cockpit instruments are connected to the static port?

Accepted Answer

Altimeter, vertical speed indicator, airspeed indicator

Answer

Airspeed indicator, direct-reading compass, slip indicator

Answer

Altimeter, slip indicator, navigational computer

Answer

Airspeed indicator, altimeter, direct-reading compass

Question 13

What does the dynamic pressure depend directly on?

Accepted Answer

Air density and airflow speed squared

Answer

Lift- and drag coefficient

Answer

Air pressure and air temperature

Answer

Air density and lift coefficient

Question 14

Calibrated airspeed (CAS) equals...

Accepted Answer

Indicated airspeed (IAS) corrected for instrument and position error.

Answer

Ground speed (GS) corrected for instrument and position error.

Answer

True airspeed (TAS) corrected for wind.

Answer

Equivalent airspeed (EAS) corrected for altitude.

Question 15

Where does the condensation water converge in the tank?

Accepted Answer

At the lowest position

Answer

It floats on the fuel

Answer

Near the cap of the tank

Answer

It is mixed with the fuel

Question 16

Which part of the cycle of a four-stroke Otto engine can be seen in the attachment? See figure (AGK-007) Siehe Anlage 1

Accepted Answer

First stroke - induction

Answer

Second stroke - compression

Answer

Fourth stroke - exhaust

Answer

Third stroke - power

Question 17

What has to be considered during refueling?

Accepted Answer

No open fires, obey smoking ban and apply ground cables

Answer

Apply ground wires, turn on the main switch and magneto ignition

Answer

Check the fuel content of the tank with a torch and remove fire protection

Answer

Refuel through a soaked rag and keep a fire extinguisher available

Question 18

Which are the advantages of sandwich structures?

Accepted Answer

Low weight, high stiffness, high stability, and high strength

Answer

Good formability and high temperature durability

Answer

High temperature durability and low weight

Answer

High strength and good formability

Question 19

What is the reason for a puddle of water below the helicopter after a flight in summer?

Accepted Answer

The air conditioning was used in flight

Answer

The windshield wiper fluid has leaked

Answer

The helicopter was frozen at cruising altitude

Answer

Vapour bubbles from the fuel lines are condensed.

Question 20

Which actions shall be taken if the engine oil pressure continuously drops to zero?

Accepted Answer

Land immediately on suitable terrain and be prepared for an autorotation

Answer

Check the mixture lever and enrich the mixture

Answer

Reduce engine performance and continue the flight to the destination

Answer

Monitor oil temperature and land at the nearest airfield

Question 21

Which colour does Avgas 100 LL have?

Accepted Answer

Blue

Answer

Yellow

Answer

Green

Answer

Red

Question 22

During hover flight (HOGE - out of ground effect) with maximum power, how does the pilot compensate for a loss of power resulting from the use of carburettor heat?

Accepted Answer

Adjust the height in a hover

Answer

Enrich the mixture

Answer

Open the vents

Answer

Turn on the electrical fuel pump

Question 23

Which of the following states the working principle of an airspeed indicator?

Accepted Answer

Total air pressure is measured and compared against static air pressure.

Answer

Dynamic air pressure is measured by the Pitot tube and converted into a speed indication by the airspeed indicator

Answer

Total air pressure is measured by the static ports and converted into a speed indication by the airspeed indicator

Answer

Static air pressure is measured and compared against a vacuum.

Question 24

What is the advantage of a hingeless rotor?

Accepted Answer

Few components are necessary

Answer

Good autorotation characteristics

Answer

Excellent blade tracking

Answer

Better lift distribution

Question 25

The trim is used to...

Accepted Answer

Adapt the control force.

Answer

Lock control elements.

Answer

Move the centre of gravity.

Answer

Increase adverse yaw.

Question 26

The slip indicator's ball (apparent vertical) has moved to the right during a right turn. By what actions may the ball led back to middle position?

Accepted Answer

Reduce bank, increase rate of turn

Answer

Reduce speed, increase bank

Answer

Reduce rate of turn, reduce bank

Answer

Increase bank, increase rate of turn

Question 27

Which components do rotor blades made of wood contain?

Accepted Answer

Spar of metal, filling material of wood and erosion protection of metal

Answer

Spar of wood, filling material of plastic, and outer skin of wood

Answer

Spar of wood, filling material of wood, and outer skin of plastic

Answer

Spar of metal, filling material of metal, and erosion protection of wood

Question 28

Which rotor blade material enables the construction of hingeless rotor heads?

Accepted Answer

Plastic

Answer

Aluminium

Answer

Titan

Answer

Timber

Question 29

What is the purpose of a belt clutch in the drive system?

Accepted Answer

It connects or disconnects the transmission from the engine to the main rotor gearbox

Answer

It allows the displacement of the ignition timing during start-up

Answer

It prevents blade movements in gusty wind conditions by blocking the drive shaft

Answer

It prevents the mechanical blocking of the main rotor during autorotation

Question 30

What kind of hydraulic oil is used in aeroplane systems today?

Accepted Answer

Synthetic oil

Answer

Bio-oil

Answer

Mineral oil

Answer

Vegetable oil

Question 31

The correlator (for pitch compensation)...

Accepted Answer

Opens the throttle when the collective is raised.

Answer

Overlays periodic and collective control inputs from the pilot.

Answer

Increases rotor RPM when the carburettor heat is turned on.

Answer

Disables the engine via a spring-loaded resistance.

Question 32

A true altitude is...

Accepted Answer

An altitude above mean sea level corrected for non-standard temperature.

Answer

A pressure altitude corrected for non-standard temperature.

Answer

A height above ground level corrected for non-standard temperature.

Answer

A height above ground level corrected for non-standard pressure.

Question 33

The droop stop...

Accepted Answer

Reduces the risk of rotor blade contact with the tail boom at low rotor RPM.

Answer

Limits blade flapping and prevents rotor blade stall.

Answer

Decreases the bending and tensional loads on the rotor blades in all flight conditions.

Answer

Decreases the bending and tensional loads on the rotor blades in all flight conditions.

Question 34

The load factor "n" describes the relationship between...

Accepted Answer

Lift and weight.

Answer

Drag and lift.

Answer

Thrust and drag.

Answer

Weight and thrust.

Question 35

The hydraulic pump of the control system is driven by the...

Accepted Answer

Main rotor gearbox.

Answer

Additional aggregate.

Answer

Engine.

Answer

Alternator.

Question 36

Which of the mentioned cockpit instruments is connected to the pitot tube?

Accepted Answer

Airspeed indicator

Answer

Vertical speed indicator

Answer

Altimeter

Answer

Direct-reading compass

Question 37

What is a cause for the dip error on the direct-reading compass?

Accepted Answer

Inclination of earth's magnetic field lines

Answer

Temperature variations

Answer

Deviation in the cockpit

Answer

Acceleration of the airplane

Question 38

Which instrument can be affected by the hysteresis error?

Accepted Answer

Altimeter

Answer

Direct reading compass

Answer

Vertical speed indicator

Answer

Tachometer

Question 39

What is the unit for electrical power?

Accepted Answer

Watt

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 40

Which value can the pilot derive from the tachometer?

Accepted Answer

Crankshaft or main rotor revolutions per minute

Answer

Airspeed of the helicopter

Answer

Vertical speed of the helicopter

Answer

Engine performance and rotor performance

Question 41

A steel or lead rotor blade spar...

Accepted Answer

Improves the autorotation characteristics by increased inertia.

Answer

Prevents high-frequency vibrations to the main rotor system.

Answer

Is necessary for the connection to the main rotor head.

Answer

Holds loads of the uniform lift distribution.

Question 42

What values are usually marked with a red line on instrument displays?

Accepted Answer

Operational limits

Answer

Operational areas

Answer

Recommended areas

Answer

Caution areas

Question 43

Which actions shall be taken if the rotor RPM indicator fails during cruise flight?

Accepted Answer

Continue the flight as long as the engine RPM indicator works

Answer

Try to get back an indication by opening and closing the throttle

Answer

Increase engine power and continue the flight to the nearest airfield

Answer

Perform an emergency landing on suitable terrain

Question 44

What difference in altitude is shown by an altimeter, if the reference pressure scale setting is changed from 1000 hPa to 1010 hPa?

Accepted Answer

80 m more than before

Answer

Values depending on QNH

Answer

Zero

Answer

80 m less than before

Question 45

Which part of the cycle of a four-stroke Otto engine can be seen in the attachment? See figure (AGK-008) Siehe Anlage 2

Accepted Answer

Second stroke - compression

Answer

First stroke - induction

Answer

Third stroke - power

Answer

Fourth stroke - exhaust

Question 46

What might be the reason for scratches on the tail stringer?

Accepted Answer

Contact with ground

Answer

Old colour

Answer

Intense erosion

Answer

Rotor blade contact

Question 47

QFE is the...

Accepted Answer

Barometric pressure at a reference datum, typically the runway threshold of an airfield.

Answer

Barometric pressure adjusted to sea level, using the international standard atmosphere (ISA).

Answer

Magnetic bearing to a station.

Answer

Altitude above the reference pressure level 1013.25 hPa.

Question 48

An aircraft in the northern hemisphere intends to turn on the shortest way from a heading of 030° to a heading of 180°. At approximately which indicated magnetic heading should the turn be terminated?

Accepted Answer

210°.

Answer

150°.

Answer

360°.

Answer

180°.

Question 49

Which pressure is sensed by the Pitot tube?

Accepted Answer

Total air pressure

Answer

Dynamic air pressure

Answer

Cabin air pressure

Answer

Static air pressure

Question 50

How is referred to a tubular steel construction with a non self-supporting skin?

Accepted Answer

Grid construction

Answer

Honeycomb structure

Answer

Monocoque construction

Answer

Semi-monocoque construction.

Question 51

When using direct current, electrically driven flight instruments are marked with...

Accepted Answer

"DC".

Answer

"AL".

Answer

"CO".

Answer

"EL".

Question 52

What devices can be affected by a failure of the electrical system in a helicopter?

Accepted Answer

Radio equipment, navigation equipment and gyros

Answer

Airspeed indicator, altimeter and artificial horizon

Answer

Radio equipment, navigation equipment and magnetic compass

Answer

Fuel quantity indication, radio equipment and altimeter

Question 53

The Caution Area is marked on an airspeed indicator by what color?

Accepted Answer

Yellow

Answer

White

Answer

Red

Answer

Green

Question 54

An aeroplane's current supply is carried out by the: 1. Battery 2. Generator 3. Relay 4. Circuit breaker

Accepted Answer

1 and 2

Answer

3 and 4

Answer

2 and 3

Answer

1 and 4

Question 55

The control mixing assembly...

Accepted Answer

Overlays periodic and collective control inputs for main rotor pitch angle change.

Answer

Releases the sprag freewheel and prevents rotor blockage by the engine.

Answer

Ensures a constant pressure distribution in a hydraulic control system of a helicopter.

Answer

Opens the throttle and increases engine performance if the collective is reduced.

Question 56

The advance angle is the angle between the...

Accepted Answer

Circumferential control rod and rotor blade longitudinal axis.

Answer

Advancing rotor blade and retreating rotor blade.

Answer

Fixed control rod and lower scissors.

Answer

Delta-three-flapping hinge and rotor blade longitudinal axis.

Question 57

The highest absorbtion of humidity in fuel can be observed in which situation?

Accepted Answer

Almost empty tanks

Answer

During parking on cold aprons

Answer

Almost full tanks

Answer

During parking on wet gras areas

Question 58

Which light colour advises the pilot to the condition "corrective action may be required in the future"?

Accepted Answer

Amber (orange)

Answer

Green

Answer

Red

Answer

Blue

Question 59

An aircraft cruises on a heading of 180° with a true airspeed of 100 kt. The wind comes from 180° with 30 kt. Neglecting instrument and position errors, which will be the approximate reading of the airspeed indicator?

Accepted Answer

100 kt

Answer

70 kt

Answer

30 kt

Answer

130 kt

Question 60

The measurement of altitude is based on the change of the...

Accepted Answer

Static pressure.

Answer

Dynamic pressure.

Answer

Total pressure.

Answer

Differential pressure.

Question 61

Why are all the connecting flanges of the main shaft designed flexible?

Accepted Answer

To compensate for thermal stresses and installation errors

Answer

For the distribution of pressure and tensile forces

Answer

To have a predetermined breaking point for engine damage

Answer

For the frictional connection to the main rotor gearbox

Question 62

What cylinder arrangement is common in helicopters with piston engines?

Accepted Answer

Boxer engine

Answer

Radial engine

Answer

Line engine

Answer

V-type engine

Question 63

What does the octane rating or fuel grade describe?

Accepted Answer

Anti-knock rating

Answer

Flame front speed

Answer

Combustion temperature

Answer

Ignition timing

Question 64

Fuel quantity in small aircraft is most commonly measured through a level sensor. The European Certification Specifications CS 23 require that...

Accepted Answer

A fuel quantity indicator must be available for each tank and the indicator must be calibrated to read "zero" during level flight when the quantity of fuel remaining in the tank is equal to the unusable fuel supply.

Answer

At least one fuel quantity indicator must be available to indicate the total amount of fuel abord an aircraft. This Indicator must be calibrated adequately to indicate the correct amount of fuel during all phases of flight.

Answer

If the fuel indicator fails, the pilot must land at the next available airport.

Answer

If no fuel quantity indicator is available to the pilot in flight, the pilot must check the fuel quantity before commencing the flight and recalculate the remaining fuel on board in regular intervals during the flight.

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