Set of flashcards Aircraft General Knowledge

Flashcards	163
Language	English
Category	Technology
Level	University
Created / Updated	25.12.2024 / 27.12.2024
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The angle indicated by arrow number 1 shows the propeller's... See figure (AGK-011)

D: Direction of air flow

C: Chord line

R: Direction of rotation

angle of incidence.

angle of attack.

geometric wing twist.

aerodynamic wing twist.

The angle indicated by arrow number 3 shows the propeller's... See figure (AGK-011)

D: Direction of air flow

C: Chord line

R: Direction of rotation

angle of incidence.

angle of attack.

geometric wing twist.

aerodynamic wing twist.

What is the advantage of a constant-speed propeller over a fixed propeller?

The angle of attack can be manually varied

The propeller is optimized for slow and acrobatic flights

The angle of attack is adjusted to the flight phase

The propeller is optimized for cruise flight

How should a power decrease be executed on a constant-speed propeller, provided that no other procedure is described in the flight manual?

1) Decrease RPM 2) Decrease manifold pressure

1) Decrease manifold pressure 2) Decrease RPM

1) Decrease manifold pressure 2) Increase RPM

1) Decrease RPM 2) Increase manifold pressure

With increasing altitude the engine power of a not turbo charged piston engine decreases because the...

air temperature decreases.

air density decreases.

air humidity decreases.

atmospheric pressure decreases.

With increasing altitude, the air/fuel mixture...

becomes richer.

becomes more lean.

stays constant.

becomes liquid.

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

increases.

decreases.

remains constant.

first decreases, from 5000 ft on increases.

During ignition check the ignition is switched to OFF for a short moment and subsequently back to BOTH. What happens to the RPM if the ignition system is properly grounded?

The RPM increases once switched to OFF and resumes the previous value when switched back to BOTH

The RPM decreases once switched to OFF and resumes the previous value when switched back to BOTH

The RPM increases once switched to OFF and resumes a value below the previous one when switched back to BOTH

The RPM decreases once switched to OFF and resumes a value below the previous one when switched back to BOTH

A Bourdon tube is suitable for the measurement of...

temperature.

weight.

pressure.

speed.

Which gauges involve a measurement of temperature?

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

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

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

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

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

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.

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

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.

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

Which value can the pilot derive from the fuel flow gauge?

The volume of fuel used per time

The fuel pressure

The fuel quantity

The fuel temperature

In case of a blockage of the static ports, the following instruments become unusable:

1. Altimeter

2. Vertical speed indicator

3. Airspeed indicator

4. Artificial horizon

1, 2, 4

1, 3, 4

2, 3, 4

1, 2, 3

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

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

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

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

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

The Pitot / static system is required to...

measure total and static air pressure.

prevent icing of the Pitot tube.

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

prevent potential static buildup on the aircraft.

Which pressure is sensed by the Pitot tube?

Total air pressure

Static air pressure

Dynamic air pressure

Cabin air pressure

What instrument is connected with the Pitot tube?

Airspeed indicator

Altimeter

Turn coordinator

Vertical speed indicator

QNH is the...

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

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

altitude above the reference pressure level 1013.25 hPa.

magnetic bearing to a station.

QFE is the...

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

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

altitude above the reference pressure level 1013.25 hPa.

magnetic bearing to a station.

Which is the purpose of the altimeter subscale?

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

To adjust the altimeter reading for non-standard temperature

To correct the altimeter reading for system errors

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

In which way may an altimeter subscale which is set to an incorrect QNH lead to an incorrect altimeter reading?

If the subscale is set to a higher than actual pressure, the indication is too high. This may lead to much closer proximity to the ground than intended

If the subscale is set to a lower than actual pressure, the indication is too low. This may lead to much closer proximity to the ground than intended

If the subscale is set to a higher than actual pressure, the indication is too low. This may lead to much greater heights above the ground than intended

If the subscale is set to a lower than actual pressure, the indication is too high. This may lead to much closer proximity to the ground than intended

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

an altitude indication which is too high.

an altitude indication which is too low.

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

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

A flight level is a...

pressure altitude.

true altitude.

density altitude.

altitude above ground.

A true altitude is...

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

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

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

a pressure altitude corrected for non-standard temperature.

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

higher than the true altitude.

lower than the true altitude.

equal to the true altitude.

equal to the standard altitude.

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

higher than the true altitude.

lower than the true altitude.

equal to the true altitude.

equal to the standard atmosphere.

Which instrument can be affected by the hysteresis error?

Altimeter

Vertical speed indicator

Tachometer

Direct reading compass

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

total pressure.

static pressure.

dynamic pressure.

differential pressure.

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

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

Total air pressure is measured and compared to static pressure

Static air pressure is measured and compared against a vacuum

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

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

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

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

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

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

An aircraft cruises at altitude 5000 ft on a heading of 180° with an indicated airspeed of 100 kt. The wind vector is 180° with 30 kt. Neglecting instrument and position errors, which will be the approximate true airspeed (TAS)?

110 kt

80 kt

121 kt

70 kt

Calibrated airspeed (CAS) equals...

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

true airspeed (TAS) corrected for wind.

equivalent airspeed (EAS) corrected for altitude.

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

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

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

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

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

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

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?

100 kt

70 kt

130 kt

30 kt

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

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

Static air pressure is measured and compared against a vacuum.

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

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

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

Operational limits

Operational areas

Caution areas

Recommended areas

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

The difference between the total pressure and the static pressure

The difference between the dynamic pressure and the static pressure

The difference between the total pressure and the dynamic pressure

The difference between the standard pressure and the total pressure

What is the meaning of the white arc on the airspeed indicator?

Speed range for extended flaps

Speed range in smooth air

Speed range in bumpy air

Speed range not to exceed

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

Speed which must not be exceeded regardless of circumstances

Speed which must not be exceeded within bumpy air

Speed which must not be exceeded with flaps extended

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

Equal magnetic poles...

attract each other.

repel each other.

do not show a reaction.

reverse the polarity.

Aircraft General Knowledge - AC

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