Aircraft General Knowledge

494問 • 2年前

ユーザ名非公開

通報

問題一覧

The volumetric efficiency of an engine depends upon-

throttle position, ambient temperature, ambient pressure and RPM

Take off power is

used only for take off, with a time limit of about 3 - 5 minutes

One disadvantage of a carburettor is-

uneven mixture distribution to cylinders

if an engine is flooded it may be started by-

mixture idle cut off, throttle wide open, crank and re-set after start

The octane rating a fuel is a measure of-

it’s resistance to detonation

If an engine running with the mixture leaned to peak EGT, is richened to over rich-

power will increase then decrease

The pressure exerted on a piston during the power stroke increases as the mass of charge induced-

increases and combustion temperatures increases

As the throttle is moved towards full throttle position-

manifold pressure increases and mass flow increases

The best action to take at the onset of detonation in an engine is-

select mixture full rich and decrease power

the onset of detonation in an engine is indicated by-

vibration, rising temperatures, and reduced IAS

For a take-off under very high density altitude conditions-

the mixture should be leaned until engines runs smoothly

An engine with a combustion chamber of 9 cubic inches capacity and a swept volume of 45 cubic inches has a compression ratio of-

6 to 1

How many degrees of crankshaft rotation are required to fire all cylinders on a in-line engine using the 4- stroke engine-

720

The reading of a manifold pressure gauge on an inoperative engine at 2000 ft AMSL would be approximately (assume ISA)

28 inHg

Friction horsepower is-

the difference between the indicated horsepower and the break horsepower

If an engine with the mixture leaned tp peak EGT, is richened to full rich and running rough

power will increase the decrease

An engine is running with the mixture fully rich. Progressive leaning to peak EGT will produce -

best power first, then best economy followed by peak EGT

The application of carburettor heat when ice has formed in the carburettor will be accompanied by-

an immediate drop in manifold pressure followed by an increase in manifold pressure and richer mixture

A decent to MSL from high altitude is made with no adjustment to mixture which was peak EGT-

back firing could occur

Vaporising of fuel in the lines (vapour locking), can be caused by -

high engine temperatures and high power

If an engine begins to run roughly because of vaporisation of the fuel during flight, the pilot should -

operate the boost pump

Cabarita refrigeration ice is most likely to form -

Around the fuel nozzle

A turbocharger with fixed waste gate allows for -

MCP up to the critical altitude

during take off in aircraft with a supercharged engine -

Throttles should be open smoothly and care takien not to exceed rated boost

Duel ignition on an aircraft engine provides an additional safety factor during flight. it is also necessary to provide -

efficient combustion on the charge during the power stroke

An aircraft electrical system operates at approximately consistent

Voltage

An aircraft with a flat battery is hand started -

The alternator may remain off-line after the engine has started

Circuit breakers and fuses protect an electrical circuit from -

Too many amps

A micro switch is

A remotely located switch which cannot be directly activated from the cockpit

See photo for question

120 minutes

The pilot of a turbocharged aircraft notices that the manifold pressure indication shows abnormal fluctuations during a long climb . Select the most likely cause

The waste gate is sticking

the purpose of a supercharger or turbo charger is to

To increase the density of air in the induction system

Vents are required in the battery compartment to ensure that

Dangerous gases such as hydrogen did not accumulate near the battery during charging

The capacity of a battery is measured in

Amp hours

A leak in the induction system of a turbo charged engine with automatically boost control will become worse

On a climb to high level

The purpose of an impulse coupling on the magneto is to-

Produce a strong and retarded spark while the engine is being cracked

If throttle and mixture leavers remained unchanged during a long climb from sea level in a non-turbo charged engine aircraft, power available will decrease because

Volumetric efficiency reduces, and the mixture becomes too rich

On application of carburettor heat when no ice is present the manifold pressure will

Drop and remain at the lower value

Operating an engine at high-power with the mixture very lean can cause-

backfiring and overheating

The position of the valves during the intake of an actual four stroke cycle engine is

exhaust open but starting to close at the start of the stroke and inlet open throughout

If an alternator failure occurs during flight, indications to the pilot would be

A discharge showing on the centre zero ammeter

If the electrical load is too high, but the alternator cannot supply the demands of the system indications on the centre zero ammeter would be-

warning light off and discharge showing

if a magneto Earth lead becomes disconnected or breaks

The magneto cannot be turned off

solenoids allow a heavy circuit to be turned on or off by the use of

A lighter current to an electromagnet

A turbocharged engine with automatic boost control is operating below critical altitude. A leak developing upstream of the turbo in the exhaust system will result in.

A waste gate moving towards the closed position

An aircraft is equipped with voltmeter. Before start up with a master switch on the voltimeter read 24 volts. The reading that would indicate normal operation during cruise would be

28 volts

Prior to an alternator failure in flight the left-hand zero ammetrer was reading 12 amps. If no electrical load were turned on a 20 amp hour battery could supply the system for approximately-

100 minutes

during the compression and power strokes of a theoretical 4 stroke cycle, on the horizontal opposed engine-

Both valves remain closed

To find the firing interval of a four stroke engine

Divide 720° by the number of cylinders

When the inlet valve is closed after BDC in a four stroke engine the maximum quantity of fuel/air charge entering the cylinder is insured. This modification to the valve timing is known as

Valve lag

mixture is progressively leaned from full rich condition to engine misfire the engine will achieve

Best power, best economy, then peak EGT

if mixture is currently set at peak EGT, moving, the mixture control to fully rich, will cause economy, (i.e. miles per gallon) to-

Increase then decrease

an increase in altitude with no adjustment in the mixture or throttle control position will produce

A richer mixture and less power

The use of a lower grade of fuel than recommended

Promotes detonation at high-power

fuel tank vents should be inspected before flight because

A blocked or iced vent can cause bladder tank to implode

use of higher grade fuel than recommended may cause

Exhaust valve corrosion

The fuel flow gauge on a fuel injected aircraft fitted with a pressure transducer fuel metering system indicate an abnormally high flow rate with normal power and mixture settings. This abnormally high flow rate indicate-

Dirty or clogged injectors

engine fire bottles are discharged

Inside the engine cowling area between the crank case and outer housing

when wire loop fire detection systems test switch is depressed, what is being tested

Only the continuity of the wire loop without fire detectors

The most common extinguishing agent use by high rate discharge extinguishing systems is-

Halon gas

High rate discharge fire extinguishing systems, discharged the extinguishing agent -

Into the engine nacelle on jet aircraft

The function of a rectifier in an electrical system is to

Convert AC current into DC current

The function of an inverter in an electrical system is to

Convert DC current into AC current

Your aircraft is equipped with a voltmeter, and you know that before start up the master switch on instrument rate 24 V. After an alternator failure, in-flight, the instrument would be expected to read.

24 V

The primary purpose of circuit breakers as used in aircraft electrical systems this to

Protect electrical units from overloading and reduce the fire hazard from short circuits

it is advisable to check magnetos at pre-flight to make sure both are operating and capable of being shut off. This check should be made.

During engine run up before takeoff

An impulse magneto coupling

Retards magneto speed during engine warmup

in the event of a failure of a generator or alternator of an aircraft’s electrical system there will be an ammater indication and

No obvious change in electrical services

A pilot should avoid prolonged operation of an electrical starter motor as this can cause

overheating the starter motor

The magneto ground wire is connected to

The magneto switch

a dual ignition system on light aircraft engines

Provides added safety and produces more efficient combustion

With the majority of opposed engines, the right-hand magneto

Fires the left top and right bottom plugs

The generator fails just after takeoff in an aircraft which has a 48 amp-hour, 24 V battery. Just prior to failure, the centre index ammator was reading a charge of 5 Amps. Without switching off any loads the approximate maximum interval before the battery goes flat .

Could not be accurately determined

An impulse coupling on a magneto

Produces a hot spark for easier starting by momentarily increasing the rotation of speed of the magneto

On a four stroke engine, the ignition is timed so that the spark occurs

Before TDC on the compression stroke

when one magneto is switched off in the dual ignition system

Ignition power is reduced because the increased combustion time result in a lower peak combustion pressure later in the power stroke

if an engine is allowed to operate too long at idling speed

The spark plugs maybe come fouled

A condenser is appropriate in the primary circuit of a magneto to

Prevent burning of the points

shielding, as employed in the aircraft electrical systems, this used for

Reducing noise in radio receiving and transmitting equipment

A reading of zero on a centre zero ammeter indicates

The alternators voltage has dropped to equal that of the battery

A voltage regulator controls alternator output bye

Varying the current flow to the alternator field coil

and aircraft fitted with a volt meter, which weighs 24 V prior to start. During course, normal operation of the electrical system would be indicated with the voltmeter showing.

24– 28 V

during flight centre, zero ammeter in an aircraft is deflected to the left of Centre (a slight discharge )this indicates

The demand on the electrical system is greater than the alternator output

The left-hand zero ammeter indicates zero during the flight

The alternator has failed

in the takeoff manifold pressure exceeds rated boost in turbo charged engine

Detonation an engine damage could result

A left hand zero ammeter shows are consistent high output when

All electrical loads are on

in a turbocharged engine, with an increase in throttle, after starting with the waste gate jammed shut, manifold pressure will

Increase faster than normal rate

In an engine fitted with an automatic waste gate, oil pressure is used to

Close the waste gate in order to direct more air through the turbine

A turbocharged piston engine aircraft fitted with a manual pilot operated wastegate is climbing at full throttle with the wastegate partially open. The current action to maintain that consistent manifold pressure, as long as possible on climb to the cruise altitude would be

slowly, close the wastegate as the climb progresses

question 49 - a turbocharged aircraft fitted with an automatic wastegate controlled by engine oil pressure which suffers a failure cutting oil pressure to waste gate control. the effect on engine operation is

Engine power will be reduced

when conducting a magneto check during the run up in an aircraft with separate switches for each magneto, there is no change in RPM when the right magneto is switched off and then on again, and the engine fails when the left magneto is switched off. A fault which would cause this is

The right magneto has failed

Wire fire detection systems are designed to detect fires

In the engine cowl enclosure

Smoke detectors are used to detect possible fires in

The cabin or crew compartment

a cause of fuel icing in turbine engine aircraft without fuel heaters may br

insufficient use of fuel system ice inhibitor (FSII)

As mixture is progressively leaned from full rich condition, the engine will experience

Best power, then best economy, then running rough

if mixture is correctly set to peak EGT, moving, the mixture control to fully rich with throttle setting unchanged will cause power output to

Increase than decrease

An unexpected high MP resulting from a advance in a turbo charged engine is most likely due to

A waste gate sticking cloased

lead acid type batteries need to be located in a ventilated battery box within the aircraft

To dissipate the flammable gases produced as by-products of the chemical reaction occurring within the battery

The prime purpose of a turbo charger is

To increase the mass airflow of an engine by increasing volumetric efficiency

100

an aircraft is equipped with a conventional centre zero type ammeter such as ammeter displays

Current flow to and from the battery

AFT General Knowledge WRONG ANSWERS

ユーザ名非公開 · 19問 · 2年前

AFT General Knowledge WRONG ANSWERS

19問 • 2年前

ユーザ名非公開

Air law practice questions

ユーザ名非公開 · 433問 · 2年前

Air law practice questions

Navigation

Navigation

Aerodynamics

Aerodynamics

Aero incorrect answers

ユーザ名非公開 · 32問 · 2年前

Aero incorrect answers

Operations

Operations

Meteorology

Meteorology

Human Factors

Human Factors

問題一覧

The volumetric efficiency of an engine depends upon-

throttle position, ambient temperature, ambient pressure and RPM

Take off power is

used only for take off, with a time limit of about 3 - 5 minutes

One disadvantage of a carburettor is-

uneven mixture distribution to cylinders

if an engine is flooded it may be started by-

mixture idle cut off, throttle wide open, crank and re-set after start

The octane rating a fuel is a measure of-

it’s resistance to detonation

If an engine running with the mixture leaned to peak EGT, is richened to over rich-

power will increase then decrease

The pressure exerted on a piston during the power stroke increases as the mass of charge induced-

increases and combustion temperatures increases

As the throttle is moved towards full throttle position-

manifold pressure increases and mass flow increases

The best action to take at the onset of detonation in an engine is-

select mixture full rich and decrease power

the onset of detonation in an engine is indicated by-

vibration, rising temperatures, and reduced IAS

For a take-off under very high density altitude conditions-

the mixture should be leaned until engines runs smoothly

An engine with a combustion chamber of 9 cubic inches capacity and a swept volume of 45 cubic inches has a compression ratio of-

6 to 1

How many degrees of crankshaft rotation are required to fire all cylinders on a in-line engine using the 4- stroke engine-

720

The reading of a manifold pressure gauge on an inoperative engine at 2000 ft AMSL would be approximately (assume ISA)

28 inHg

Friction horsepower is-

the difference between the indicated horsepower and the break horsepower

If an engine with the mixture leaned tp peak EGT, is richened to full rich and running rough

power will increase the decrease

An engine is running with the mixture fully rich. Progressive leaning to peak EGT will produce -

best power first, then best economy followed by peak EGT

The application of carburettor heat when ice has formed in the carburettor will be accompanied by-

an immediate drop in manifold pressure followed by an increase in manifold pressure and richer mixture

A decent to MSL from high altitude is made with no adjustment to mixture which was peak EGT-

back firing could occur

Vaporising of fuel in the lines (vapour locking), can be caused by -

high engine temperatures and high power

If an engine begins to run roughly because of vaporisation of the fuel during flight, the pilot should -

operate the boost pump

Cabarita refrigeration ice is most likely to form -

Around the fuel nozzle

A turbocharger with fixed waste gate allows for -

MCP up to the critical altitude

during take off in aircraft with a supercharged engine -

Throttles should be open smoothly and care takien not to exceed rated boost

Duel ignition on an aircraft engine provides an additional safety factor during flight. it is also necessary to provide -

efficient combustion on the charge during the power stroke

An aircraft electrical system operates at approximately consistent

Voltage

An aircraft with a flat battery is hand started -

The alternator may remain off-line after the engine has started

Circuit breakers and fuses protect an electrical circuit from -

Too many amps

A micro switch is

A remotely located switch which cannot be directly activated from the cockpit

See photo for question

120 minutes

The pilot of a turbocharged aircraft notices that the manifold pressure indication shows abnormal fluctuations during a long climb . Select the most likely cause

The waste gate is sticking

the purpose of a supercharger or turbo charger is to

To increase the density of air in the induction system

Vents are required in the battery compartment to ensure that

Dangerous gases such as hydrogen did not accumulate near the battery during charging

The capacity of a battery is measured in

Amp hours

A leak in the induction system of a turbo charged engine with automatically boost control will become worse

On a climb to high level

The purpose of an impulse coupling on the magneto is to-

Produce a strong and retarded spark while the engine is being cracked

If throttle and mixture leavers remained unchanged during a long climb from sea level in a non-turbo charged engine aircraft, power available will decrease because

Volumetric efficiency reduces, and the mixture becomes too rich

On application of carburettor heat when no ice is present the manifold pressure will

Drop and remain at the lower value

Operating an engine at high-power with the mixture very lean can cause-

backfiring and overheating

The position of the valves during the intake of an actual four stroke cycle engine is

exhaust open but starting to close at the start of the stroke and inlet open throughout

If an alternator failure occurs during flight, indications to the pilot would be

A discharge showing on the centre zero ammeter

If the electrical load is too high, but the alternator cannot supply the demands of the system indications on the centre zero ammeter would be-

warning light off and discharge showing

if a magneto Earth lead becomes disconnected or breaks

The magneto cannot be turned off

solenoids allow a heavy circuit to be turned on or off by the use of

A lighter current to an electromagnet

A turbocharged engine with automatic boost control is operating below critical altitude. A leak developing upstream of the turbo in the exhaust system will result in.

A waste gate moving towards the closed position

An aircraft is equipped with voltmeter. Before start up with a master switch on the voltimeter read 24 volts. The reading that would indicate normal operation during cruise would be

28 volts

Prior to an alternator failure in flight the left-hand zero ammetrer was reading 12 amps. If no electrical load were turned on a 20 amp hour battery could supply the system for approximately-

100 minutes

during the compression and power strokes of a theoretical 4 stroke cycle, on the horizontal opposed engine-

Both valves remain closed

To find the firing interval of a four stroke engine

Divide 720° by the number of cylinders

When the inlet valve is closed after BDC in a four stroke engine the maximum quantity of fuel/air charge entering the cylinder is insured. This modification to the valve timing is known as

Valve lag

mixture is progressively leaned from full rich condition to engine misfire the engine will achieve

Best power, best economy, then peak EGT

if mixture is currently set at peak EGT, moving, the mixture control to fully rich, will cause economy, (i.e. miles per gallon) to-

Increase then decrease

an increase in altitude with no adjustment in the mixture or throttle control position will produce

A richer mixture and less power

The use of a lower grade of fuel than recommended

Promotes detonation at high-power

fuel tank vents should be inspected before flight because

A blocked or iced vent can cause bladder tank to implode

use of higher grade fuel than recommended may cause

Exhaust valve corrosion

Dirty or clogged injectors

engine fire bottles are discharged

Inside the engine cowling area between the crank case and outer housing

when wire loop fire detection systems test switch is depressed, what is being tested

Only the continuity of the wire loop without fire detectors

The most common extinguishing agent use by high rate discharge extinguishing systems is-

Halon gas

High rate discharge fire extinguishing systems, discharged the extinguishing agent -

Into the engine nacelle on jet aircraft

The function of a rectifier in an electrical system is to

Convert AC current into DC current

The function of an inverter in an electrical system is to

Convert DC current into AC current

24 V

The primary purpose of circuit breakers as used in aircraft electrical systems this to

Protect electrical units from overloading and reduce the fire hazard from short circuits

it is advisable to check magnetos at pre-flight to make sure both are operating and capable of being shut off. This check should be made.

During engine run up before takeoff

An impulse magneto coupling

Retards magneto speed during engine warmup

in the event of a failure of a generator or alternator of an aircraft’s electrical system there will be an ammater indication and

No obvious change in electrical services

A pilot should avoid prolonged operation of an electrical starter motor as this can cause

overheating the starter motor

The magneto ground wire is connected to

The magneto switch

a dual ignition system on light aircraft engines

Provides added safety and produces more efficient combustion

With the majority of opposed engines, the right-hand magneto

Fires the left top and right bottom plugs

Could not be accurately determined

An impulse coupling on a magneto

Produces a hot spark for easier starting by momentarily increasing the rotation of speed of the magneto

On a four stroke engine, the ignition is timed so that the spark occurs

Before TDC on the compression stroke

when one magneto is switched off in the dual ignition system

Ignition power is reduced because the increased combustion time result in a lower peak combustion pressure later in the power stroke

if an engine is allowed to operate too long at idling speed

The spark plugs maybe come fouled

A condenser is appropriate in the primary circuit of a magneto to

Prevent burning of the points

shielding, as employed in the aircraft electrical systems, this used for

Reducing noise in radio receiving and transmitting equipment

A reading of zero on a centre zero ammeter indicates

The alternators voltage has dropped to equal that of the battery

A voltage regulator controls alternator output bye

Varying the current flow to the alternator field coil

and aircraft fitted with a volt meter, which weighs 24 V prior to start. During course, normal operation of the electrical system would be indicated with the voltmeter showing.

24– 28 V

during flight centre, zero ammeter in an aircraft is deflected to the left of Centre (a slight discharge )this indicates

The demand on the electrical system is greater than the alternator output

The left-hand zero ammeter indicates zero during the flight

The alternator has failed

in the takeoff manifold pressure exceeds rated boost in turbo charged engine

Detonation an engine damage could result

A left hand zero ammeter shows are consistent high output when

All electrical loads are on

in a turbocharged engine, with an increase in throttle, after starting with the waste gate jammed shut, manifold pressure will

Increase faster than normal rate

In an engine fitted with an automatic waste gate, oil pressure is used to

Close the waste gate in order to direct more air through the turbine

slowly, close the wastegate as the climb progresses

Engine power will be reduced

The right magneto has failed

Wire fire detection systems are designed to detect fires

In the engine cowl enclosure

Smoke detectors are used to detect possible fires in

The cabin or crew compartment

a cause of fuel icing in turbine engine aircraft without fuel heaters may br

insufficient use of fuel system ice inhibitor (FSII)

As mixture is progressively leaned from full rich condition, the engine will experience

Best power, then best economy, then running rough

if mixture is correctly set to peak EGT, moving, the mixture control to fully rich with throttle setting unchanged will cause power output to

Increase than decrease

An unexpected high MP resulting from a advance in a turbo charged engine is most likely due to

A waste gate sticking cloased

lead acid type batteries need to be located in a ventilated battery box within the aircraft

To dissipate the flammable gases produced as by-products of the chemical reaction occurring within the battery

The prime purpose of a turbo charger is

To increase the mass airflow of an engine by increasing volumetric efficiency

100

an aircraft is equipped with a conventional centre zero type ammeter such as ammeter displays

Current flow to and from the battery