Airbus A320 - Engines

What is the difference between variable thrust and the speed mode?

In the variable thrust mode, thrust is fixed and speed is controlled by the elevator.

In the fixed thrust mode, thrust is variable and speed is controlled by the elevator.

In the fixed thrust mode, thrust is fixed and the elevator controls the speed.

Correct! Wrong!

During an engine start sequence, the gray background on N2 disappears at about 57%. What does this indicate?

There is a start fault and a dry crank is in progress.

The start valve air pressure has dropped.

The start sequence has finished and all engine parameters have stabilized.

The igniters are no longer being powered.

Correct! Wrong!

For an inflight start, the FADEC decides whether the engine is windmilling fast enough or needs assistance from the starter in view of current engine parameters and flight environment parameters.

False.

True.

Correct! Wrong!

Auto Thrust System - When are the throttles in the engagement range?

A single throttle of an operating engine is above idle but not above the MCT detent when one engine is running.

Both throttles are above idle but not above the CLB detent when both engines are running.

All statements are correct.

Correct! Wrong!

For automatic starts, the FADEC opens the HP fuel valve at _____. For manual starts, the HP fuel valve opens when the engine master switch is turned on.

22% N2 on the ground and 15% N2 in flight.

15% N2 on the ground and 22% N2 in flight.

10% N2 on the ground and 15% N2 in flight.

15% N2 on the ground and 10% N2 in flight.

Correct! Wrong!

Maximum reverse should not be used below _____. Idle reverse is permitted down to aircraft stop.

70 kt.

90 kt.

80 kt.

60 kt.

Correct! Wrong!

When an engine out condition is detected, autothrust is available between the idle stop and MCT/FLX detent.

False.

True.

Correct! Wrong!

The FADEC manages ____ idle modes.

Three (Modulated idle, Approach idle and Reverse idle).

Two (Modulated idle and Approach idle).

Four (Regulated idle, Modulated idle, Approach idle and Reverse idle).

Correct! Wrong!

The ignition system is for engine starting on the ground and restarting in flight. It consists of two identical independent circuits for each engine, normally controlled by the FADEC channel A and channel B. Each FADEC channel can control both igniters.

True.

False.

Correct! Wrong!

Does the FADEC provide EGT limit protection constantly?

No, EGT limit protection is only available during ground auto starts and single-engine operations.

No, EGT limit protection is only available during ground auto starts.

Yes, in all phases of flight.

Correct! Wrong!

After takeoff the A/THR will not become active until:

The autopilot is engaged.

The thrust levers are placed in the CLIMB position.

The thrust levers are moved out of the TO/GA or FLEX/MCT detents.

The A/THR pushbutton is manually selected ON.

Correct! Wrong!

During a manual start, how is the start valve opened?

By depressing the ENG MAN START pb on the overhead panel while the ENG MODE selector is out of the NORM position.

It is automatic once the ENG MASTER is placed to the ON position.

By depressing the ENG MAN START pb on the overhead panel.

Correct! Wrong!

For manual starts, the FADEC has very limited authority to abort a start. The sole case is when on the ground and a start EGT exceedance occurs before 50% N2. In all other cases, it is the pilot's responsibility to interrupt the start sequence by either deselecting the manual start button or turning the engine master switch off as appropriate.

True.

False.

Correct! Wrong!

For reverser actuation, the left engine uses hydraulic system pressure and the right engine uses hydraulic system pressure.

Yellow - Green.

Green - Yellow.

Blue - Green.

Yellow - Blue.

Correct! Wrong!

What would happen during the takeoff roll if the thrust levers were set to the FLX/MCT detent without FLEX temperature being entered?

The thrust setting would be MCT and there would be no corresponding warnings.

Nothing, the thrust setting would be at FLEX since FADEC automatically calculates a reduced thrust setting.

A LEVEL TWO warning would sound along with the appearance of an ECAM message.

Correct! Wrong!

How many FADECs are installed on the aircraft?

Four in total. Two per engine.

One, with two Engine Control Units (ECU).

Two, one per engine.

Correct! Wrong!

During an automatic start, the FADEC controls:

The start valves, igniters, HP and LP fuel valves.

The igniters and fuel flow.

The start valves, igniters, HP and LP fuel valves, and fuel flow.

The start valves, igniters and fuel flow.

Correct! Wrong!

Alpha floor protection is available:

From lift off and down to 500 feet radio altitude in the landing configuration.

From lift off and down to 750 feet radio altitude in the landing configuration.

From lift off and down to 50 feet radio altitude in the landing configuration.

From lift off and down to 100 feet radio altitude in the landing configuration.

Correct! Wrong!

IGNITION FOR STARTING – On the ground, the ignition comes on automatically when N2 reaches _ and cuts off automatically when N2 reaches _.

12% and 50%

18% and 55%

16% and 50%

15% and 55%

Correct! Wrong!

Oil pressure and temperature are monitored upstream of the oil filter.

True.

False.

Correct! Wrong!

Oil pressure and temperature are monitored downstream of the oil filter.

What is Alpha floor protection?

It helps prevent the aircraft from stalling and protects against windshear encounters during takeoff and approach.

It is a function of the flight control laws to prevent the aircraft from stalling.

It helps prevent the aircraft from stalling by limiting the angle of bank at low airspeeds.

It helps prevent the aircraft from stalling by limiting the angle of climb at high airspeeds.

Correct! Wrong!

How many thrust lever positions are there, and how are they labeled?

There are 6 thrust levers positions: TO/GA, FLX/MCT, CL, IDLE, REV IDLE and MREV.

There are 4 thrust levers positions: TO/GA, FLX/MCT, CL, IDLE.

There are 5 thrust levers positions: TO/GA, FLX/MCT, CL, IDLE and REV IDLE.

There are 7 thrust levers positions: TO/GA, MCT, FLEX, CL, IDLE, REV IDLE, and MREV.

Correct! Wrong!

During normal operation, in what detent are the thrust levers positioned once the thrust reduction altitude has been reached?

CL.

FLX.

CRZ.

MCT.

Correct! Wrong!

What does the FLEX represent in the FLX/MCT detent?

This is the maximum continuous thrust setting for single-engine operations.

This is the thrust setting that should be chosen in the case of a single-engine go-around.

This is a reduced thrust setting used for takeoff.

This is a derated thrust according the ground temperature of the day.

Correct! Wrong!

If a throttle is set between two detents, the FADEC selects the rating limit:

Corresponding to the higher mode.

Corresponding to the lower mode.

Determined by the throttle position.

Correct! Wrong!

When Alpha floor is activated, what power setting is automatically commanded and what FMA annunciation would appear in Column one?

TOGA / A. FLOOR.

THR / LK.

CLB / CLB.

MCT / THR LK.

Correct! Wrong!

If fuel flow data is lost for more than _____, the last two digits are dashed.

One minute.

20 seconds.

45 seconds.

30 seconds.

Correct! Wrong!

While flying the airplane with A/THR active, the speed knob is pulled and turned to a selected speed that happens to be slower than Alpha prot. What speed will the airplane slow to?

Green dot + 10 kt.

Green dot.

VLS.

Green Dot + 5 kt.

Correct! Wrong!

The FADEC is normally powered by:

The AC aircraft electrical system.

The DC aircraft electrical system.

Its own magnetic alternator.

The DC then the AC aircraft electrical system.

Correct! Wrong!

The system has a magnetic alternator for an internal power source. FADEC is mounted on the fan case.

Continuous ignition is provided automatically when:

ENG ANTI ICE is selected ON.

ENG ANTI ICE is selected ON and/or engine flameout is detected in flight and/or the EIU fails.

ENG ANTI ICE is selected ON and/or engine flameout is detected in flight

Correct! Wrong!

The FADEC prevents the thrust from exceeding the limit for the thrust lever position in automatic mode only.

False.

True.

Correct! Wrong!

The FADEC prevents the thrust from exceeding the limit for the thrust lever position in both manual and automatic modes.

During engine start the amber FAULT light on the ENG MASTER panel illuminates. What does this indicate?

A failure in the engine fire extinguishing system.

A failure of the ENG MODE SELECTOR.

A failure in the automatic start sequence.

Correct! Wrong!

A/THR - Holding the instinctive disconnect pb for more than 15 seconds will:

Disengage the A/THR (excluding Alpha Floor) for the reminder of the flight.

Disengage the A/THR (including Alpha Floor) until below 500 feet AGL for the reminder of the flight.

Disengage the A/THR (including Alpha Floor) for the reminder of the flight.

Disengage the A/THR (including Alpha Floor) until below 1000 feet AGL for the reminder of the flight.

Correct! Wrong!

Which steps of a manual start are being taken care of by the FADEC?

Starter valve closure and ignition cut off.

Starter valve closure and ignition start.

Starter valve opening and ignition cut off.

Starter valve opening and ignition start.

Correct! Wrong!

There is no reverse idle detent. When the pilot moves the lever out of the idle stop by pulling up the reverse lever on the front of the thrust lever, he selects reverse idle.

True.

False.

Correct! Wrong!

Verification that Autothrust (A/THR) is active can be made by:

Watching the automatic movement of the thrust levers.

Only by looking at column five of the FMA.

Only when the thrust levers are set at TOGA.

Correct! Wrong!

During a manual start, what function does the FADEC perform?

Passive monitoring of the start sequence, to close the start valve and cut off the ignition on the ground.

The FADEC does not perform any function during a manual start and all actions have to be carried out by the pilots.

To control the start sequence and take corrective action in case of a failure or malfunction.

Correct! Wrong!

What is considered to be the active range of the A/THR system?

During single engine operations from just above the IDLE stop to the FLX/MCT detent.

During two engine operations from just above the IDLE stop to the CL detent.

All statements are correct.

Correct! Wrong!

During an automatic starting, the FADEC detects a hot start, a hung start, or a stall, but the "no light up" is not monitored.

False.

True.

Correct! Wrong!

The FADEC detects a hot start, a hung start, a stall, or no light up.

The left column, first line of the FMA is used to indicate:

If A/THR is off, armed, or active.

Amber caution messages.

The mode of the A/THR in use when A/THR is armed or active.

The thrust indication.

Correct! Wrong!

During the automatic start sequence of ENG 2, you notice that only igniter B is powered. Is it normal?

Yes, igniter A is only used for engine anti-ice.

Yes, igniters are used alternately for engine start.

No, normally both igniters are used for all engine starts.

Yes, igniter B is always used for ENG 2 start.

Correct! Wrong!

The A/THR is armed on the ground provided at least one FD (Flight Director) is on by:

Setting the throttles to TO/GA.

Pressing the A/THR pb manually.

Engine start.

Correct! Wrong!

What does this indication mean ?

Alphafloor is in the direct mode.

Alphafloor is active.

Alphafloor is in the alternate mode.

Alphafloor is inoperative.

Correct! Wrong!

If an A/THR disconnect switch is pushed and held for more than _____, the A/THR system is disconnected for the reminder of the flight. This includes the Alpha floor protection.

15 Seconds.

18 Seconds.

12 Seconds.

6 Seconds.

Correct! Wrong!

The FADEC will automatically abort an abnormal start thereby providing engine limit protection, but will the FADEC also automatically dry crank the engine?

No, that is why there is a CRANK selection on the ENG MODE selector.

Yes, as long as the ENG MASTER switch remains in the ON position.

Yes, even if the crew interrupts the start by placing the ENG MASTER switch to OFF.

Correct! Wrong!

A/THR engagement is confirmed when A/THR is displayed in _____ in the right column of the FMA.

Green.

Blue.

White.

Correct! Wrong!

Is any thrust lever action required if an engine failed at rotation while using FLEX takeoff power?

No.

Yes.

Correct! Wrong!

If the thrust lever is set between two detents, the FADEC selects the rating limit corresponding to the:

Lower or higher detent depending of the N1 RPM.

Lower detent.

Lower or higher detent depending of the N2 RPM.

Higher detent.

Correct! Wrong!

You are in the middle of a manual engine start. What are you looking for when you select ENG MASTER 2 ON?

The fuel flow is reset, an igniter is powered and fuel used is indicated.

The fuel used is reset, fuel flow is indicated and IGNITION message on the E/WD.

The fuel used is reset, both igniters are powered and fuel flow is indicated.

The fuel used is reset, both igniters are powered and N2 is increasing.

Correct! Wrong!

The thrust levers can only be moved manually. There are 3 detents and 2 stops on the thrust quadrant.

False.

True.

Correct! Wrong!

There are 2 detents and 3 stops on the thrust quadrant. These are the TOGA stop, MCT/FLX detent, CL detent, Idle stop and Max reverse stop.

In normal operation, autothrust is available when the thrust levers are in the range between the idle stop and CLB detent.

False.

True.

Correct! Wrong!

Thrust reverser system – Each pivoting door moves independently but the doors are synchronized.

True.

False.

Correct! Wrong!

Each pivoting door moves independently (the doors are NOT synchronized). The total actuation time is less than two seconds.

A few seconds after selecting reverse, the amber REV indication changes to green. What does this mean?

The reversers have been re-stowed.

The reversers are unlocked.

The reverse thrust selection has been activated by the FADEC.

The reversers are now fully deployed.

Correct! Wrong!

Can the engines be overboosted in the TOGA position?

No, because the EIU is responsible for monitoring N1 and N2.

No, because the ECU provides engine protection limit by monitoring N1, N2, and HMU fuel flow adjustments.

Yes, if the autothrust function is not active.

Correct! Wrong!

If the thrust levers are set in the idle detent, is Alpha floor protection still available?

Yes. As long as A/THR appears in column five.

Yes. Thrust lever position is disregarded.

No, because the IDLE detent is out of the A/THR active range.

Correct! Wrong!

You are at the start of a descent and a blue N1 arc is displayed showing the new thrust demand. When does this happen?

Whenever there is power change with auto thrust engaged.

Whenever the thrust levers are moved out of the CLIMB position.

Whenever there is a power change with the autopilot engaged.

Whenever there is a power change in manual thrust.

Correct! Wrong!

Thrust reduction must not exceed 25 % of the full rated takeoff thrust. To meet this requirement, the flexible temperature must not be higher than ISA +60 °C(T MAX FLEX).

True.

False.

Correct! Wrong!

When the A/THR system is in use:

The throttles move automatically according to FADEC commands.

The throttles can only be moved manually.

The throttles will move when the A/THR p/b is used.

Correct! Wrong!

Using manual thrust, the thrust lever position will determine the thrust setting for the engine.

True. They will operate like conventional throttles.

True, but care must be taken not to overspeed the engines.

False. The next higher detent will be the thrust limit.

Correct! Wrong!

The EGT limit appears when a takeoff or a go-around mode is selected, or when the thrust reversers are selected, or if the alpha floor protection is activated.

True.

False.

Correct! Wrong!

The EGT limit does NOT appear when a takeoff or a go-around mode is selected, or when the thrust reversers are selected, or if the alpha floor protection is activated.

When does oil quantity indication begin to pulse?

The oil quantity is the red area.

There is an oil quantity detector fault.

The oil quantity goes below the oil advisory limit (3 QT), that corresponds to the amber mark.

During engine start.

Correct! Wrong!

The EGT red line appears between the EGT red limit and the end of the scale. The EGT red limit is:

750 deg.C

850 deg.C

900 deg.C

950 deg.C.

Correct! Wrong!

In flight, both igniters are supplied, when the ENG MASTER sw is ON.

True.

False.

Correct! Wrong!

If the automatic start fails, the FADEC energizes both igniters at the same time during the second attempt at an engine start.

True.

False.

Correct! Wrong!

The FADEC will automatically command the reverse to stow, if at least one door is unstowed and reverse thrust is not selected while the engine is running.

True.

False.

Correct! Wrong!

Auto restow is totally inhibited in flight, and on ground, with N1 greater than 70 %.

Is there any mechanical linkage between the thrust levers and the engines?

No, it is totally electrical.

There is a mechanical linkage in case the ECU fails.

No, it is electrically powered and hydraulically actuated.

There is a fiber optic backup.

Correct! Wrong!

The Full Authority Digital Engine Control (FADEC) controls:

All statements are correct.

Engine limits.

Fuel metering.

Automatic and manual starting.

Correct! Wrong!

Is it possible to disconnect Alpha floor?

Yes, by depressing the autothrottle push button on the FCU.

Yes, by placing the thrust levers to IDLE.

No, Alpha floor protection is always available.

Correct! Wrong!

The idle setting on the aircraft is capable of modulating due to certain conditions. During descent, what might cause the IDLE N1 setting to increase?

For a higher than normal bleed air demand or warmer than normal engine oil temp in flight.

All statements are correct.

The slats are extended.

Correct! Wrong!

How do you arm the A/THR in flight?

A/THR switch ON when throttles are not in the engagement mode.

A/THR switch ON when throttles are in the engagement mode.

Correct! Wrong!

What is required for the FADEC to compute a reduced thrust setting?

A FLEX temperature must be entered on the ENG PERF page of the MCDU.

A FLEX temperature must be entered on the TAKE OFF PERF page of the MCDU.

Nothing, it is an automatic function of the FADEC.

A FLEX temperature must be entered on the INIT page of the MCDU.

Correct! Wrong!

Data for the FADECs is directly sourced from the ADIRS, engine sensors and thrust levers. All other required data is amalgamated and supplied by an Engine Interface Unit (EIU).

False.

True.

Correct! Wrong!

The FADEC system is self-powered:

When AC power is fully distributed.

When AC power is fully distributed and above 5% N1.

Above 12 % N2.

Above 5% N1

Correct! Wrong!

Airbus A320 – Engines

Quiz

Airbus A320 - Engines

What is the difference between variable thrust and the speed mode?

During an engine start sequence, the gray background on N2 disappears at about 57%. What does this indicate?

For an inflight start, the FADEC decides whether the engine is windmilling fast enough or needs assistance from the starter in view of current engine parameters and flight environment parameters.

Auto Thrust System - When are the throttles in the engagement range?

For automatic starts, the FADEC opens the HP fuel valve at _____. For manual starts, the HP fuel valve opens when the engine master switch is turned on.

Maximum reverse should not be used below _____. Idle reverse is permitted down to aircraft stop.

When an engine out condition is detected, autothrust is available between the idle stop and MCT/FLX detent.

The FADEC manages ____ idle modes.

The ignition system is for engine starting on the ground and restarting in flight. It consists of two identical independent circuits for each engine, normally controlled by the FADEC channel A and channel B. Each FADEC channel can control both igniters.

Does the FADEC provide EGT limit protection constantly?

After takeoff the A/THR will not become active until:

During a manual start, how is the start valve opened?

For reverser actuation, the left engine uses ____ hydraulic system pressure and the right engine uses ____ hydraulic system pressure.

What would happen during the takeoff roll if the thrust levers were set to the FLX/MCT detent without FLEX temperature being entered?

How many FADECs are installed on the aircraft?

During an automatic start, the FADEC controls:

Alpha floor protection is available:

IGNITION FOR STARTING – On the ground, the ignition comes on automatically when N2 reaches _____ and cuts off automatically when N2 reaches _____.

Oil pressure and temperature are monitored upstream of the oil filter.

What is Alpha floor protection?

How many thrust lever positions are there, and how are they labeled?

During normal operation, in what detent are the thrust levers positioned once the thrust reduction altitude has been reached?

What does the FLEX represent in the FLX/MCT detent?

If a throttle is set between two detents, the FADEC selects the rating limit:

When Alpha floor is activated, what power setting is automatically commanded and what FMA annunciation would appear in Column one?

If fuel flow data is lost for more than _____, the last two digits are dashed.

While flying the airplane with A/THR active, the speed knob is pulled and turned to a selected speed that happens to be slower than Alpha prot. What speed will the airplane slow to?

The FADEC is normally powered by:

Continuous ignition is provided automatically when:

The FADEC prevents the thrust from exceeding the limit for the thrust lever position in automatic mode only.

During engine start the amber FAULT light on the ENG MASTER panel illuminates. What does this indicate?

A/THR - Holding the instinctive disconnect pb for more than 15 seconds will:

Which steps of a manual start are being taken care of by the FADEC?

There is no reverse idle detent. When the pilot moves the lever out of the idle stop by pulling up the reverse lever on the front of the thrust lever, he selects reverse idle.

Verification that Autothrust (A/THR) is active can be made by:

During a manual start, what function does the FADEC perform?

What is considered to be the active range of the A/THR system?

During an automatic starting, the FADEC detects a hot start, a hung start, or a stall, but the "no light up" is not monitored.

The left column, first line of the FMA is used to indicate:

During the automatic start sequence of ENG 2, you notice that only igniter B is powered. Is it normal?

The A/THR is armed on the ground provided at least one FD (Flight Director) is on by:

What does this indication mean ?

If an A/THR disconnect switch is pushed and held for more than _____, the A/THR system is disconnected for the reminder of the flight. This includes the Alpha floor protection.

The FADEC will automatically abort an abnormal start thereby providing engine limit protection, but will the FADEC also automatically dry crank the engine?

A/THR engagement is confirmed when A/THR is displayed in _____ in the right column of the FMA.

Is any thrust lever action required if an engine failed at rotation while using FLEX takeoff power?

If the thrust lever is set between two detents, the FADEC selects the rating limit corresponding to the:

You are in the middle of a manual engine start. What are you looking for when you select ENG MASTER 2 ON?

The thrust levers can only be moved manually. There are 3 detents and 2 stops on the thrust quadrant.

In normal operation, autothrust is available when the thrust levers are in the range between the idle stop and CLB detent.

Thrust reverser system – Each pivoting door moves independently but the doors are synchronized.

A few seconds after selecting reverse, the amber REV indication changes to green. What does this mean?

Can the engines be overboosted in the TOGA position?

If the thrust levers are set in the idle detent, is Alpha floor protection still available?

You are at the start of a descent and a blue N1 arc is displayed showing the new thrust demand. When does this happen?

Thrust reduction must not exceed 25 % of the full rated takeoff thrust. To meet this requirement, the flexible temperature must not be higher than ISA +60 °C(T MAX FLEX).

When the A/THR system is in use:

Using manual thrust, the thrust lever position will determine the thrust setting for the engine.

The EGT limit appears when a takeoff or a go-around mode is selected, or when the thrust reversers are selected, or if the alpha floor protection is activated.

When does oil quantity indication begin to pulse?

The EGT red line appears between the EGT red limit and the end of the scale. The EGT red limit is:

In flight, both igniters are supplied, when the ENG MASTER sw is ON.

If the automatic start fails, the FADEC energizes both igniters at the same time during the second attempt at an engine start.

The FADEC will automatically command the reverse to stow, if at least one door is unstowed and reverse thrust is not selected while the engine is running.

Is there any mechanical linkage between the thrust levers and the engines?

The Full Authority Digital Engine Control (FADEC) controls:

Is it possible to disconnect Alpha floor?

The idle setting on the aircraft is capable of modulating due to certain conditions. During descent, what might cause the IDLE N1 setting to increase?

How do you arm the A/THR in flight?

What is required for the FADEC to compute a reduced thrust setting?

Data for the FADECs is directly sourced from the ADIRS, engine sensors and thrust levers. All other required data is amalgamated and supplied by an Engine Interface Unit (EIU).

The FADEC system is self-powered:

For reverser actuation, the left engine uses hydraulic system pressure and the right engine uses hydraulic system pressure.

IGNITION FOR STARTING – On the ground, the ignition comes on automatically when N2 reaches _ and cuts off automatically when N2 reaches _.