Set of flashcards 021 Fragen

Flashcards	45
Language	Deutsch
Category	Technology
Level	Other
Created / Updated	27.05.2025 / 02.06.2025
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Which systems allows greater airflow around the cylinder cooling fins during high power setting operations?

cowl flaps.

air deflection plates.

oil cooler shutters.

baffles.

cowl flaps.

air deflection plates.

oil cooler shutters.

baffles.

What is the correct method of checking that an aircooled piston engine is operating at the correct temperature? By...

...checking the cyclinderhead gauge and adjusting the throttle.

...checking the cylinder head gauge and adjusting the cowl flaps.

...adjusting the mixture and looking for black smoke.

...adjusting the propeller RPM while checking the temp gauge.

...checking the cyclinderhead gauge and adjusting the throttle.

...checking the cylinder head gauge and adjusting the cowl flaps.

...adjusting the mixture and looking for black smoke.

...adjusting the propeller RPM while checking the temp gauge.

An impulse coupling...

is used after ignition to crank the engine.

accelerates one magneto by spring force to produce a spark for ignition.

accelerates both magnetos by spring force to produce a spark for ignition.

operates all the time the engine is running and resets after the engine is stopped.

is used after ignition to crank the engine.

accelerates one magneto by spring force to produce a spark for ignition.

accelerates both magnetos by spring force to produce a spark for ignition.

operates all the time the engine is running and resets after the engine is stopped.

In a piston engine, turbocharger boost pressure may be monitored by:

Both engine RPM readings and a manifold pressure gauge.

A cylinder head temperature gauge (CHT), a manifold pressure gauge (MAP), and engine RPM readings.

A manifold pressure gauge only.

Both a CHT gauge and manifold pressure gauge.

Both engine RPM readings and a manifold pressure gauge.

A cylinder head temperature gauge (CHT), a manifold pressure gauge (MAP), and engine RPM readings.

A manifold pressure gauge only.

Both a CHT gauge and manifold pressure gauge.

Which propeller pitch angle corresponds to the feathered position?

ca. 45 degrees.

ca. 0 degrees.

ca. -10 degrees.

ca. 90 degrees.

ca. 45 degrees.

ca. 0 degrees.

ca. -10 degrees.

ca. 90 degrees.

With a fuel-air mixture ratio of ..., the highest combustion temperature is reached.

1/25

1/10

1/18

1/15

1/25

1/10

1/18

1/15

In an aircraft equipped with a float type carburettor and a constant speed propeller, carburettor icing would probably first be detected by?

Detonation.

A drop in engine RPM.

A drop in manifold pressure and engine RPM.

A drop in manifold pressure.

Detonation.

A drop in engine RPM.

A drop in manifold pressure and engine RPM.

A drop in manifold pressure.

What is the principal advantage of using propeller reduction gears?

engine RPM to be increased with an accompanying increase in propeller RPM

propeller RPM to be decreased without an accompanying increase in engine RPM

propeller RPM to be increased without an accompanying increase in engine RPM

engine RPM to be increased to improve power and torque, while propeller RPM remains efficient and lower

engine RPM to be increased with an accompanying increase in propeller RPM

propeller RPM to be decreased without an accompanying increase in engine RPM

propeller RPM to be increased without an accompanying increase in engine RPM

engine RPM to be increased to improve power and torque, while propeller RPM remains efficient and lower

Feathering a single acting constant speed propeller: Which force moves the blades to feather?

Oil pressure and solenoid valve lifting

Spring pressure

Spring pressure and oil pressure

Counterweights and oil pressure

Oil pressure and solenoid valve lifting

Spring pressure

Spring pressure and oil pressure

Counterweights and oil pressure

What is stiffness?

Stiffness limits the extent of an elastic deformation in response to an application of a defined force

Stiffness is stress multiplied with strain

Stiffness is a specific strength in respect to plastic deformation

Stiffness is the stress in a structure when a bending force is applied

Stiffness limits the extent of an elastic deformation in response to an application of a defined force

Stiffness is stress multiplied with strain

Stiffness is a specific strength in respect to plastic deformation

Stiffness is the stress in a structure when a bending force is applied

On small aircraft, the fuel content is typically measured by:

Calculation of the center of gravity of the airplane

The volume of the fuel in the tank

The weight of the fuel in the tank

The level of the fuel in the tank

Calculation of the center of gravity of the airplane

The volume of the fuel in the tank

The weight of the fuel in the tank

The level of the fuel in the tank

What happens to the current in a series capacitive circuit when frequency increases?

…increases

…decreases

…neither increases nor decreases

…either increases or decreases

…increases

…decreases

…neither increases nor decreases

…either increases or decreases

The purpose of a carburettor is to provide atomised and correctly proportioned...

diesel to the injectors

AVGAS to the engine

diesel to the engine

AVGAS to the injectors

diesel to the injectors

AVGAS to the engine

diesel to the engine

AVGAS to the injectors

Which statement is true concerning the effect of the application of carburettor heat?

…density of air entering the carburettor, thus enriching the fuel/air mixture

…volume of air entering the carburettor, thus leaning the fuel/air mixture

…density of air entering the carburettor, thus leaning the fuel/air mixture

…volume of air entering the carburettor, thus enriching the fuel/air mixture

…density of air entering the carburettor, thus enriching the fuel/air mixture

…volume of air entering the carburettor, thus leaning the fuel/air mixture

…density of air entering the carburettor, thus leaning the fuel/air mixture

…volume of air entering the carburettor, thus enriching the fuel/air mixture

Camshaft speed relative to crankshaft speed is:

The same

Half

Twice

Four times

The same

Half

Twice

Four times

A variable displacement pump delivers minimum output when the stationary yoke is:

Moving to a position at maximum angle with the driving shaft.

At a right angle with the driving shaft.

Moving towards a position at a right angle with the driving shaft.

At maximum angle with the driving shaft.

Keyboard commands:

= turn,

= for-/backward,

= scroll

Moving to a position at maximum angle with the driving shaft.

At a right angle with the driving shaft.

Moving towards a position at a right angle with the driving shaft.

At maximum angle with the driving shaft.

Spoilers installed on a typical large transport aeroplane are:

Upper wing surface devices and their deflection can be symmetrical or asymmetrical.

Lower wing surface devices and their deflection can be symmetrical or asymmetrical.

Lower wing surface devices and their deflection is always asymmetrical.

Upper wing surface devices and their deflection is always asymmetrical.

Keyboard commands:

= turn,

= for-/backward,

= scroll

Upper wing surface devices and their deflection can be symmetrical or asymmetrical.

Lower wing surface devices and their deflection can be symmetrical or asymmetrical.

Lower wing surface devices and their deflection is always asymmetrical.

Upper wing surface devices and their deflection is always asymmetrical.

The viscosity of a hydraulic fluid should be: The...

...lowest to minimize power consumption and resistance to flow.

...highest to minimize power consumption and resistance to flow.

...lowest to provide excellent lubrication properties.

...highest to provide excellent lubrication properties.

Keyboard commands:

= turn,

= for-/backward,

= scroll

...lowest to minimize power consumption and resistance to flow.

...highest to minimize power consumption and resistance to flow.

...lowest to provide excellent lubrication properties.

...highest to provide excellent lubrication properties.

With regard to a jet transport aircraft generally speaking, what is an all moveable horizontal stabiliser?

The angle of the vertical tail with respect to the fuselage can be changed about a vertical axis for trimming purposes.

The angle of the stabiliser with respect to the fuselage can be changed for trimming purposes.

The angle of the stabiliser with respect to the fuselage can be changed and serves as an elevator.

The entire tail, stabiliser and vertical tail, can be moved with respect to the fuselage for trimming purposes.

Keyboard commands:

= turn,

= for-/backward,

= scroll

The angle of the vertical tail with respect to the fuselage can be changed about a vertical axis for trimming purposes.

The angle of the stabiliser with respect to the fuselage can be changed for trimming purposes.

The angle of the stabiliser with respect to the fuselage can be changed and serves as an elevator.

The entire tail, stabiliser and vertical tail, can be moved with respect to the fuselage for trimming purposes.

Landing gear up selection on the ground on a modern large transport aircraft is prevented by means of:

Over centre links.

Weight on wheel switches.

Uplocks.

Downlocks.

Keyboard commands:

= turn,

= for-/backward,

= scroll

Over centre links.

Weight on wheel switches.

Uplocks.

Downlocks.

Shuttle valve will automatically:

Guard systems against overpressure.

Switch hydraulically operated units to the most appropriate pressure supply.

Reduce pump loads.

Shut down systems which are overloaded.

Keyboard commands:

= turn,

= for-/backward,

= scroll

Guard systems against overpressure.

Switch hydraulically operated units to the most appropriate pressure supply.

Reduce pump loads.

Shut down systems which are overloaded.

Which component of the landing gear absorbs forces acting in lateral direction?

side strut.

shock strut.

torsion link.

drag strut.

Keyboard commands:

= turn,

= for-/backward,

= scroll

side strut.

shock strut.

torsion link.

drag strut.

The purpose of an accumulator in a hydraulic system is: To...

...bypass the pumps in the hydraulic system.

...eliminate the fluid flow variations.

...damp the fluid pressure variations.

...enable the starting of hydraulic devices.

Keyboard commands:

= turn,

= for-/backward,

= scroll

...bypass the pumps in the hydraulic system.

...eliminate the fluid flow variations.

...damp the fluid pressure variations.

...enable the starting of hydraulic devices.

Multi-disc brake unit: The heat pack consists of ...

Pressure Plate, Stators and Rotors, Pressure Ring and Actuators

Torque Tube, Stators and Rotors, Pressure Ring

Torque Tube, Stators and Rotors, Pressure Ring and Actuators

Pressure Plate, Stators and Rotors, Pressure Ring

Keyboard commands:

= turn,

= for-/backward,

= scroll

Pressure Plate, Stators and Rotors, Pressure Ring and Actuators

Torque Tube, Stators and Rotors, Pressure Ring

Torque Tube, Stators and Rotors, Pressure Ring and Actuators

Pressure Plate, Stators and Rotors, Pressure Ring

Axial piston type pumps are often used in hydraulic systems. Why?

These pumps have the ability to produce high pressure when required (on demand).

The safety feature of the quill drive shearing due to pump seizure and the ease of repair by replacement of pump and shaft only.

Their low cost, simplicity and durability.

Their ability to produce high pressure combined with constant high flow rate.

Keyboard commands:

= turn,

= for-/backward,

= scroll

These pumps have the ability to produce high pressure when required (on demand).

The safety feature of the quill drive shearing due to pump seizure and the ease of repair by replacement of pump and shaft only.

Their low cost, simplicity and durability.

Their ability to produce high pressure combined with constant high flow rate.

In a hydraulic system, hydraulic fuses can be found. Their function is to ...

allow bypassing of a hydraulic pump in case it is subject to excessive pressure, without further damage to the system.

isolate a part of the system and protect it against accidental pollution.

switch to the secondary system in case of a leak in the primary brake system.

prevent total system loss in case of a leaking brake hydraulic line.

allow bypassing of a hydraulic pump in case it is subject to excessive pressure, without further damage to the system.

isolate a part of the system and protect it against accidental pollution.

switch to the secondary system in case of a leak in the primary brake system.

prevent total system loss in case of a leaking brake hydraulic line.

What is the purpose of trim tabs? The purpose is to...

...reduce stick holding forces to zero.

...increase control effectiveness.

...reduce stick forces in manoeuvres.

...reduce control effectiveness.

...reduce stick holding forces to zero.

...increase control effectiveness.

...reduce stick forces in manoeuvres.

...reduce control effectiveness.

What is the working principle of leading edge flaps in connection with trailing edge flaps?

This further increases the camber of the wing.

This balances the wing aerodynamic centre.

The leading edge flap is used for take off while the trailing edge flap is used for landing.

This balances the wing centre of gravity.

This further increases the camber of the wing.

This balances the wing aerodynamic centre.

The leading edge flap is used for take off while the trailing edge flap is used for landing.

This balances the wing centre of gravity.

What are the conditions necessary in order to parallel DC generators?

Output frequency must be different.

Voltage must be equalised.

Output frequency must be nearly the same.

Voltage must be different.

Output frequency must be different.

Voltage must be equalised.

Output frequency must be nearly the same.

Voltage must be different.

The squirrel cage rotor is used in:

Hysteresis motors.

DC motors.

Synchronous motors.

Induction motors.

Hysteresis motors.

DC motors.

Synchronous motors.

Induction motors.

021 Fragen

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