Aircraft General Knowledge - AC

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This flashcard set covers advanced aircraft systems and instruments at a university level. It focuses on understanding pressure, flight indicators, airspeed, and engine control systems, along with their errors and corrections. Pilots and aviation students will benefit from this set to improve their knowledge of aircraft instrumentation and system functionality, ensuring safer and more efficient flight operations.

Cartes-fiches

163

Utilisateurs

Langue

Anglais

Catégorie

Technique

Niveau

Université

Créé / Mis à jour

25.12.2024 / 27.12.2024

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Cartes-fiches

When trimming an aircraft nose up, in which direction does the trim tab move?

It moves down

It moves up

Depends on CG position

In direction of rudder deflection

Trimming an aircraft nose up, in which direction does the trim tab move?

Down

Either down or up, depending on whether the elevator is producing an upward or a downward force

The trim tab always moves in the direction of the rudder deflection

The trim is used to...

increase adverse yaw.

adapt the control force.

move the centre of gravity.

lock control elements.

Which of the following are an aircraft's secondary flight controls?

Wing flaps, leading edge devices, spoilers or speedbrakes, trim systems

Elevator, rudder, aileron

Elevator, rudder, aileron, trim tabs, high-lift wing devices, power controls

All movable parts on the aircraft which aid in controlling the aircraft

What has to be considered during refueling?

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

No open fires, obey smoking ban and apply ground cables

Refuel through a soaked rag and keep a fire extinguisher available

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

The primer is...

a mechanical switch in the cockpit to engage the turbocharger.

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

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

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

What is the purpose of the tank ventilation?

To prevent underpressure caused by fuel consumption

To prevent fuel spillage during refueling on the filler plug

To prevent water disposal during parking

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

In a fuel pump system, what has to be considered, in accordance with the respective manual, before switching to another tank?

Shut off ignition

Switch on carburettor heating

Switch on fuel pump

Switch on primer

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

1 and 4

1 and 2

2 and 3

3 and 4

What is the unit for voltage?

Ohm

Volt

Ampere

Watt

What is the unit for electrical power?

Ohm

Volt

Ampere

Watt

The voltmeter provides an indication of...

the electric potential difference in a system in Volt [V].

the electric current in a system in Ampére [A].

the system voltage in Ampére [A].

the electric current in a system in Volt [V].

What is the reason for static dischargers on aircraft?

To discharge static charging during flight

To eliminate electrical interferences during intensive radio traffic

To ensure grounding during refueling

To improve the quality of radio transmission in high altitudes

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

All instruments and warning systems will fail

Only high power consumers will fail

The engine runs roughly and is prone to knocking

No change as long as the battery provides enough power

Which flight instrument (depending on construction) can be supplied by the onboard power supply?

Altimeter

Magnetic compass

Airspeed indicator

Horizontal situation indicator

Electrically driven flight instruments are marked with...

"DC".

"EL".

"CO".

"AL".

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

Radio equipment, navigation equipment and magnetic compass

Fuel quantity indication, radio equipment and altimeter

Airspeed indicator, altimeter and artificial horizon

Radio equipment, navigation equipment and gyros

Which cylinder arrangement is commonly used on small aircrafts and motor gliders?

In-line engine

Radial engine

Horizontally opposed engine

V-type engine

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

First stroke - induction

Second stroke - compression

Third stroke - power

Fourth stroke – exhaust

Which part of the cycle of a four-stroke Otto engine can be seen in the attachment? See figure (AGK-010)

First stroke - induction

Second stroke - compression

Third stroke - power

Fourth stroke – exhaust

What is likely to be the cause if the engine runs unusually rough while checking the magnetos?

Starter is faulty

Short circuit on the ground cable

Sparking plug is defective

Ignition switch is faulty

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

Almost full tanks

Almost empty tanks

During parking on wet grass areas

During parking on cold aprons

Where does the condensation water converge in the tank?

At the lowest position

It floats on the fuel

It is mixed with the fuel

Near the cap of the tank

The "drain" procedure should be done in accordance with the flight manual...

once a week.

before each flight.

before the first flight of each day.

before each landing.

What does the octane rating or fuel grade describe?

Anti-knock rating

Flame front speed

Combustion temperature

Ignition timing

What is the measure of anti-knock resistance in fuel?

Heating value

Octane rating

Flash point

Ignition timing

Which colour does Avgas 100 LL have?

Green

Red

Yellow

Blue

What does the octane rating give information about?

Suppression of microorganisms

Influence on ignition temperature

Degradation of static electricity

Improvement of storability

What is the direct influence by switching on the carburettor heating on fixed propeller engines during engine run-up?

RPM increases

RPM decreases

Angle of attack increases

Angle of attack decreases

What is the major task of a carburettor?

To produce an ignitable air/fuel mixture

To provide additional fuel to cool the engine

To pump fuel from the tanks into the cylinder

To control the aircraft's speed through the throttle valve

A result of carburettor icing is...

a reduction of engine power.

an increase of engine power.

a dropping oil pressure.

a rising oil pressure.

In which phase of flight must the carburettor heating be switched off although carburettor icing might be expected?

During taxi

During climb

During cruise

During take-off

In which outside air temperature is icing most likely?

Between -5° C and +20° C

Between -15° C and 0° C

Between -10° C and +10° C

Between -20° C and +5° C

Which actions shall be taken if the carburettor temperature gauge migrates into the yellow range?

Find cooler air layers

Lean the mixture

Enrich the mixture

Use the carburettor heat

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

Leading the airflow to parts designated to be cooled

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

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

Increasing the airflow thus improving cooling of cylinder parts

Cylinder head temperature indication relates to...

the critical cylinder.

a random cylinder.

all cylinders.

the average of all cylinders.

What happens during oil filter clogging?

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

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

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

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

How should an Otto engine be shut down?

By completely leaning the mixture

By shutting down the generator

By closing the throttle lever completely

By moving the propeller to the feathered position

Piston engines of helicopters have...

two coupled ignition systems.

two independent ignition systems.

one electrical ignition system.

one magneto ignition system.

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

Lean

Rich

Full

Empty

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Aircraft General Knowledge - AC

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