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

Question 1

Which of the stated materials shows the highest strength?

Accepted Answer

Carbon fiber re-inforced plastic

Answer

Aluminium

Answer

Magnesium

Answer

Wood

Question 2

The pilot wants to refuel the helicopter after a cold night early in the morning. What needs to be checked before starting the engine?

Accepted Answer

Fuel for water content and impurities

Answer

VHF communication for transmission

Answer

Carburettor heat for function

Answer

Left seat controls for damage and tight fit

Question 3

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 4

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 5

Which instrument can be affected by the hysteresis error?

Accepted Answer

Altimeter

Answer

Direct reading compass

Answer

Vertical speed indicator

Answer

Tachometer

Question 6

What is the major task of a carburettor?

Accepted Answer

To produce an ignitable air/fuel mixture

Answer

To provide additional fuel to cool the engine

Answer

To pump fuel from the tanks into the cylinder

Answer

To control the aircraft's speed through the throttle valve

Question 7

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 8

What is the meaning of the red range on the airspeed indicator?

Accepted Answer

Speed which must not be exceeded regardless of circumstances

Answer

Speed which must not be exceeded within bumpy air

Answer

Speed which must not be exceeded with flaps extended

Answer

Speed which must not be exceeded in turns with more than 45° bank

Question 9

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 10

What is caused by the movement of the cyclic stick?

Accepted Answer

The swash plate is inclined and thus changes the pitch angle of the blades periodically

Answer

The lower scissors are twisted and consequently the pitch angle of the rotor blade is changed periodically

Answer

The sliding sleeve is axially moved and thus changes the pitch angle of the rotor blades collectively

Answer

The trim panels are inclined and consequently a torque on the rotor blade is produced

Question 11

In which outside air temperature is icing most likely?

Accepted Answer

Between -5° C and +20° C

Answer

Between -15° C and 0° C

Answer

Between -20° C and +5° C

Answer

Between -10° C and +10° C

Question 12

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 13

What is the purpose of engine oil in piston engine?

Accepted Answer

Cooling, lubrication of the engine and disposal of fine abrasion.

Answer

Cooling, lubrication and increasing engine performance.

Answer

For nose reduction and bearing of the propeller shaft.

Answer

Cooling of the engine and lubrication of propeller shaft.

Question 14

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 15

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 16

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 17

A horizontal situation indicator (HSI) combines the information provided by...

Accepted Answer

The directional gyro and the VHF navigation receiver.

Answer

The attitude indicator and the flight director.

Answer

The rate gyro and the slip indicator.

Answer

The directional gyro and the flight director.

Question 18

What is the most likely reason for the starter not turning when activated?

Accepted Answer

The rotor break is engaged

Answer

The magnetos are defect

Answer

The ignition is short-circuited

Answer

The alternator is defect

Question 19

Which of the instruments listed below obtain their readings through pressure measurement?

Accepted Answer

Oil pressure gauge, fuel pressure gauge, manifold pressure gauge, altimeter, vertical speed indicator, airspeed indicator, suction gauge

Answer

Oil pressure gauge, fuel pressure gauge, fuel quantity gauge, manifold pressure gauge, differential pressure gauge, altimeter

Answer

Airspeed indicator, vertical speed indicator, altimeter, directional gyro, turn and bank coordinator, oil pressure gauge, fuel pressure gauge

Answer

Airspeed indicator, vertical speed indicator, altimeter, magnetic compass, oil pressure gauge, fuel pressure gauge

Question 20

A spider control...

Accepted Answer

Changes the pitch angle of the rotor blades via an internal control rod.

Answer

Feeds fuel by the rotational movement of pistons with various lengths.

Answer

Prevents the overlay of collective and periodic control inputs on the main rotor.

Answer

Changes the ignition timing of the magneto ignition during start-up.

Question 21

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 22

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 23

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

Accepted Answer

"DC".

Answer

"AL".

Answer

"CO".

Answer

"EL".

Question 24

At higher altitudes, true airspeed (TAS) tends to be higher than calibrated airspeed (CAS). A rough estimate of the TAS can be obtained by...

Accepted Answer

Adding 2 % of the CAS for every 1000 ft altitude.

Answer

Subtracting 2 % of the CAS for every 1000 ft altitude.

Answer

Subtracting 10 % of the CAS for every 1000 m altitude.

Answer

Adding 10 % of the CAS for every 1000 ft altitude.

Question 25

What is the purpose of the tank ventilation?

Accepted Answer

To prevent underpressure caused by fuel consumption

Answer

To distribute the fuel from one tank segment to the other during flight

Answer

To prevent water disposal during parking

Answer

To prevent fuel spillage during refueling on the filler plug

Question 26

What is the advantage of a gyrodyne compared to a helicopter?

Accepted Answer

High airspeed in cruise

Answer

Large centre of gravity limits

Answer

No gearbox is necessary

Answer

Low fuel consumption

Question 27

With increasing altitude and unchanged mixture setting, the air/fuel mixture...

Accepted Answer

Becomes richer.

Answer

Becomes more lean.

Answer

Stays constant.

Answer

Becomes liquid.

Question 28

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 29

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 30

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 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

The vertical speed indicator measures the difference of pressure between...

Accepted Answer

The present static pressure and the static pressure of a previous moment.

Answer

The present total pressure and the total pressure of a previous moment.

Answer

The present dynamic pressure and the dynamic pressure of a previous moment.

Answer

The present dynamic pressure and the static pressure of a previous moment.

Question 33

What is the unit for voltage?

Accepted Answer

Volt

Answer

Ohm

Answer

Watt

Answer

Ampere

Question 34

The Pitot / static system is required to...

Accepted Answer

Measure total and static air pressure.

Answer

Prevent icing of the Pitot tube.

Answer

Correct the reading of the airspeed indicator to zero when the aircraft is static on the ground.

Answer

Prevent potential static buildup on the aircraft.

Question 35

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 36

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 37

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 38

A vertical speed indicator measures the difference between...

Accepted Answer

Instantaneous static pressure and previous static pressure.

Answer

Instantaneous total pressure and previous total pressure.

Answer

Total pressure and static pressure.

Answer

Dynamic pressure and total pressure.

Question 39

Piston engines of helicopters have...

Accepted Answer

Two independent ignition systems.

Answer

One magneto ignition system.

Answer

Two coupled ignition systems.

Answer

One electrical ignition system.

Question 40

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 41

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 42

During a flight in colder-than-ISA air the indicated altitude is...

Accepted Answer

Higher than the true altitude.

Answer

Lower than the true altitude

Answer

Eqal to the true altitude.

Answer

Equal to the standard altitude.

Question 43

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 44

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 45

How do you call fuel mixtures with a high amount of fuel?

Accepted Answer

Rich

Answer

Empty

Answer

Full

Answer

Lean

Question 46

What behaviour is shown by a rotating gyro in space?

Accepted Answer

It tends to maintain its position in space

Answer

It moves in accordance with the body surrounding it

Answer

It swings from east to west like a pendulum

Answer

It moves in circles with a stadily decreasing radius

Question 47

A flight level is a...

Accepted Answer

Pressure altitude.

Answer

True altitude.

Answer

Altitude above ground.

Answer

Density altitude.

Question 48

Which components do rotor blades made of synthetic material contain?

Accepted Answer

Spar of lead and synthetic material, filling material and outer skin of synthetic material, erosion protection of stainless steel

Answer

Spar of synthetic material, filling material and outer skin of synthetic material, erosion protection of aluminum

Answer

Spar of aluminum and synthetic material, filling material and outer skin and erosion protection of synthetic material

Answer

Spar of stainless steel, filling material and outer skin and erosion protection of synthetic material

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

What happens during oil filter clocking?

Accepted Answer

A bypass valve opens thus enabling the circulation to continue, debris will not be filtered

Answer

The oil circulation will end after 30 minutes so that a proper engine run will not be guaranteed

Answer

A bypass valve opens thus enabling the circulation to continue, debris will be filtered by an alternate filter

Answer

The oil circulation will end after 15 minutes so that a proper engine run will not be guaranteed

Question 51

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 52

When is it necessary to adjust the pressure in the reference scale of an alitimeter?

Accepted Answer

Before every flight and during cross country flights

Answer

After maintance has been finished

Answer

Once a month before flight operation

Answer

Every day before the first flight

Question 53

Lower-than-standard temperature may lead to...

Accepted Answer

An altitude indication which is too high.

Answer

A correct altitude indication as long as the altimeter subscale is set to correct for non-standard temperature.

Answer

A blockage of the Pitot tube by ice, freezing the altimeter indication to its present value.

Answer

An altitude indication which is too low.

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 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 56

The connection between the main rotor mast and the main rotor head is...

Accepted Answer

Screwed.

Answer

Welded.

Answer

Pressed.

Answer

Glued.

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

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 59

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 60

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 61

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 62

QNE is the...

Accepted Answer

Altitude above the reference pressure level 1013.25 hPa.

Answer

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

Answer

Magnetic bearing to a station.

Answer

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

Question 63

Why is the main rotor gearbox a limiting factor in most piston-driven helicopters?

Accepted Answer

The gear wheels will be displaced from each other at high torque and strain the gearbox bearings

Answer

The electronic monitoring of the gearbox reacts susceptible at high torques

Answer

The drive shaft in the gearbox is made of solid material and tends to break at high torques

Answer

The supply of oil pressure lubrication in the gearbox is constructed on average loads

Question 64

Which gauges involve a measurement of temperature?

Accepted Answer

Engine lubricant, engine cooling fluid, cylinder head, exhaust gas, outside air, cabin air

Answer

Engine lubricant, exhaust gas, outside air, cabin air, directional gyro

Answer

Engine lubricant, cylinder head, exhaust gas, suction, outside air, cabin air

Answer

Engine oil, cylinder head, exhaust gas, altimeter, airspeed indicator, vertical speed indicator

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