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

Question 1

Where does a geometrically twisted rotor blade have its largest pitch angle?

Accepted Answer

Next to the rotor blade roots

Answer

Between rotor blade tips and rotor blade roots

Answer

In the entire area of the rotor blade

Answer

Next to the rotor blade tips

Question 2

What is the task of cooling fins on air-cooled engine cylinders?

Accepted Answer

Quick heat transfer to the surrounding air flow by expanding the surface

Answer

Leading the airflow to parts designated to be cooled

Answer

Cooling of the cylinder surrounding airflow and forwarding to hotter engine parts

Answer

Increasing the airflow thus improving cooling of cylinder parts

Question 3

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 4

What is the reason for static dischargers on aircraft?

Accepted Answer

To discharge static charging during flight

Answer

To improve the quality of radio transmission in high altitudes

Answer

To ensure grounding during refueling

Answer

To eliminate electrical interferences during intensive radio traffic

Question 5

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

Accepted Answer

Rich

Answer

Empty

Answer

Full

Answer

Lean

Question 6

Which instrument can be affected by the hysteresis error?

Accepted Answer

Altimeter

Answer

Direct reading compass

Answer

Vertical speed indicator

Answer

Tachometer

Question 7

The airspeed indicator is unservicable. The airplane may only be operated...

Accepted Answer

When the airspeed indicator is fully functional again.

Answer

If no maintenance organisation is around.

Answer

When a GPS with speed indication is used during flight.

Answer

If only airfield patterns are flown.

Question 8

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 9

During a flight in an air mass with a temperature equal to ISA and the QNH set correctly, the indicated altitude is...

Accepted Answer

Equal to the true altitude.

Answer

Lower than the true altitude.

Answer

Higher than the true altitude.

Answer

Equal to the standard atmosphere.

Question 10

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 11

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 12

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 13

The rotor brake should be engaged (provided that no other procedure is described in the flight manual)...

Accepted Answer

For outside parking.

Answer

During all prescribed pre-flight checks on the ground.

Answer

For inside parking.

Answer

During start-up until reaching the prescribed rotor rpm.

Question 14

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 15

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 16

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 17

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 18

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 19

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 20

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 21

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 22

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 23

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 24

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 25

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 26

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

Accepted Answer

270°

Answer

360°

Answer

300°

Answer

240°

Question 27

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 28

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 29

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 30

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 31

Which colour does Avgas 100 LL have?

Accepted Answer

Blue

Answer

Yellow

Answer

Green

Answer

Red

Question 32

The bank angle of a 2-minutes circle depends on the...

Accepted Answer

TAS.

Answer

CAS.

Answer

IAS.

Answer

Ground speed.

Question 33

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 34

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

Question 35

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 36

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 37

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 38

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.

Question 39

What is the advantage of a pushing tail rotor over a pulling tail rotor?

Accepted Answer

Less thrust loss by free outflow of the accelerated air mass

Answer

Gain of thrust by Coanda and Magnus effect due to the airflow around the tail boom

Answer

Effective airflow of tail rotor blades by using the downwash

Answer

Self-compensating anti-torque operation by using the downwash

Question 40

Which is the purpose of the altimeter subscale?

Accepted Answer

To reference the altimeter reading to a predetermined level such as mean sea level, aerodrome level or pressure level 1013.25 hPa

Answer

To set the reference level for the altitude decoder of the transponder

Answer

To adjust the altimeter reading for non-standard temperature

Answer

To correct the altimeter reading for system errors

Question 41

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 42

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 43

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

Accepted Answer

Screwed.

Answer

Welded.

Answer

Pressed.

Answer

Glued.

Question 44

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 45

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 46

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 47

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 48

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 49

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 50

What reduces wearout on a skid-shoe landing gear?

Accepted Answer

Hardened skid shoes

Answer

Angled landing skids

Answer

Blanked bend tubes

Answer

Flexible fittings

Question 51

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 52

Which method of measurement is mostly used for the fuel supply indication on helicopters?

Accepted Answer

Capacitive measurement

Answer

Dipstick measurement

Answer

Flow measurement

Answer

Inductive measurement

Question 53

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 54

What kind of helicopter needs a tail rotor?

Accepted Answer

Single-rotor helicopter with shaft drive

Answer

Twin-rotor helicopter with counter-rotating main rotors

Answer

Single-rotor helicopter with blade drive

Answer

Twin-rotor autogyro with counter-rotating main rotors

Question 55

The primer is...

Accepted Answer

An auxiliary pump in the fuel system to facilitate engine starting.

Answer

A nozzle in the Venturi tube of a carburettor for atomising the fuel.

Answer

A mechanical switch in the cockpit to engage the turbocharger.

Answer

A valve in the fuel control system for automatic mixture regulation.

Question 56

Which of the following options states the working principle of a vertical speed indicator?

Accepted Answer

Measuring the present static air pressure and comparing it to the static air pressure inside a reservoir

Answer

Total air pressure is measured and compared to static pressure

Answer

Measuring the vertical acceleration through the displacement of a gimbal-mounted mass

Answer

Static air pressure is measured and compared against a vacuum

Question 57

What is the unit for voltage?

Accepted Answer

Volt

Answer

Ohm

Answer

Watt

Answer

Ampere

Question 58

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 59

What does the slip indicator show?

Accepted Answer

Apparent vertical

Answer

Airplane's bank

Answer

Vertical to horizon

Answer

Rate of turn

Question 60

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 61

Which of the stated materials shows the highest strength?

Accepted Answer

Carbon fiber re-inforced plastic

Answer

Aluminium

Answer

Magnesium

Answer

Wood

Question 62

With increasing altitude, the power of a carburettor engine...

Accepted Answer

Decreases.

Answer

Remains constant.

Answer

Increases.

Answer

First decreases, from 5000 ft on increases.

Question 63

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 64

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

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