B777 Engines And APU
During flights we have come to know that the APU can be shut down shortly after the engines start running, as the energy needed can then be produce by the engines. What more can you tell about the relationship between the Engine and the APU for the B777 plane? Take the test to find out!
- 1.
What thrust reference mode indicates an assumed temperature derated takeoff thrust is selected?
- A.
TO 1
- B.
D-TO
- C.
TO
- D.
TO 2
Correct Answer
B. D-TOExplanation
The correct answer is D-TO. D-TO stands for Derated Takeoff, which indicates that an assumed temperature derated takeoff thrust is selected. This means that the engine thrust is intentionally reduced during takeoff based on a calculated assumed temperature, which helps to optimize performance and reduce wear on the engine.Rate this question:
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- 2.
During climb with the engine EEC switches in normal, what will occur when youmanually position the thrust levers to the full forward position?
- A.
The engines will exceed the maximum rated thrust.
- B.
The engines will produce maximum climb thrust
- C.
The engines will produce maximum rated thrust.
- D.
The EEC alternate mode will automatically engage.
Correct Answer
C. The engines will produce maximum rated thrust.Explanation
When the thrust levers are manually positioned to the full forward position during climb with the engine EEC switches in normal, the engines will produce maximum rated thrust.Rate this question:
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- 3.
During cruise with the engine EEC switches in the normal mode, What occurs youmanually position the thrust levers to the full forward position?
- A.
The engines will exceed the maximum rated thrust.
- B.
The engines will produce maximum cruise thrust.
- C.
The EEC alternate mode will automatically engage.
- D.
The engines will produce maximum rated thrust.
Correct Answer
D. The engines will produce maximum rated thrust.Explanation
When the engine EEC switches to the normal mode, manually positioning the thrust levers to the full forward position will result in the engines producing maximum rated thrust.Rate this question:
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- 4.
What does the EICAS message ENG OIL PRESS R indicate?
- A.
Engine oil pressure is low.
- B.
Engine oil pressure is high.
- C.
Engine oil temperature is low
- D.
Engine oil temperature is high.
Correct Answer
A. Engine oil pressure is low.Explanation
The EICAS message ENG OIL PRESS R indicates that the engine oil pressure is low. This means that the oil is not being circulated properly to lubricate and cool the engine components. Low oil pressure can lead to engine damage and failure if not addressed promptly.Rate this question:
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- 5.
What does the EICAS message ENG OIL TEMP L indicate?
- A.
Engine oil pressure is low.
- B.
Engine oil pressure is high.
- C.
Engine oil temperature is low.
- D.
Engine oil temperature is high.
Correct Answer
D. Engine oil temperature is high.Explanation
The EICAS message ENG OIL TEMP L indicates that the engine oil temperature is high. This means that the temperature of the engine oil is above the normal operating range, which could potentially lead to engine damage or failure if not addressed. It is important to monitor and control the engine oil temperature to ensure the proper functioning and longevity of the engine.Rate this question:
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- 6.
What does the EICAS message ENG FUEL VALVE L indicate?
- A.
The engine fuel valve on the left engine is closed.
- B.
The spar or engine fuel valve on the left engine has not reached its commanded position.
- C.
Both the spar and the engine fuel valves on the left engine are commanded to the same position.
- D.
The fuel/oil heat exchanger valve is not functioning.
Correct Answer
B. The spar or engine fuel valve on the left engine has not reached its commanded position.Explanation
The EICAS message ENG FUEL VALVE L indicates that the spar or engine fuel valve on the left engine has not reached its commanded position. This means that the valve is not in the position it is supposed to be in, which could potentially affect the fuel flow to the engine. It is important to address this issue to ensure proper engine operation.Rate this question:
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- 7.
What does the EICAS message ENG FUEL VALVE R indicate?
- A.
The engine fuel valve on the right engine is open.
- B.
Both the spar and the engine fuel valves on the right engine are commanded to the same position.
- C.
The spar or engine fuel valve on the right engine has not reached its commanded position.
- D.
The fuel filter bypass valve is not functioning.
Correct Answer
C. The spar or engine fuel valve on the right engine has not reached its commanded position.Explanation
The EICAS message ENG FUEL VALVE R indicates that the spar or engine fuel valve on the right engine has not reached its commanded position. This means that there is an issue with the fuel valve, and it has not fully opened or closed as it should. It could be due to a mechanical problem or a malfunction in the control system. This message alerts the pilot to the potential issue and allows them to take appropriate action to resolve it.Rate this question:
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- 8.
With autostart ON, when do you move the FUEL CONTROL switch to RUN?
- A.
After START has been selected on the START/IGNITION selector
- B.
After reaching maximum motoring speed
- C.
After the engine stabilizes at idle
- D.
After 18% N2 has been reached
Correct Answer
A. After START has been selected on the START/IGNITION selectorExplanation
The correct answer is "After START has been selected on the START/IGNITION selector." This is because selecting START on the START/IGNITION selector initiates the engine start sequence, and once the engine has started and stabilized, the FUEL CONTROL switch can be moved to the RUN position to allow fuel flow to the engine for continued operation.Rate this question:
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- 9.
What powers the left engine thrust reverser?
- A.
Left hydraulic system
- B.
Center hydraulic system
- C.
Left engine bleed air
- D.
Right engine bleed air
Correct Answer
A. Left hydraulic systemExplanation
The left engine thrust reverser is powered by the left hydraulic system. Hydraulic systems are used to generate and transmit power in aircraft, and in this case, the left hydraulic system provides the necessary power to activate the thrust reverser on the left engine. This system is responsible for reversing the direction of the engine's thrust, which helps in decelerating the aircraft during landing.Rate this question:
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- 10.
What powers the right engine thrust reverser?
- A.
Left engine bleed air
- B.
Right engine bleed air
- C.
Center hydraulic system
- D.
Right hydraulic system
Correct Answer
D. Right hydraulic systemExplanation
The right engine thrust reverser is powered by the right hydraulic system. This means that the hydraulic system is responsible for providing the necessary power and pressure to activate and control the thrust reverser on the right engine.Rate this question:
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- 11.
What does the EICAS message ENG REV LIMITED R indicate?
- A.
The right engine reverser will provide maximum reverse thrust for a limited time.
- B.
The right engine reverser will not deploy or will be limited to idle on landing.
- C.
The right engine reverse thrust indication is not valid.
- D.
The right engine reverse thrust is limited to rejected takeoffs only.
Correct Answer
B. The right engine reverser will not deploy or will be limited to idle on landing.Explanation
The EICAS message "ENG REV LIMITED R" indicates that the right engine reverser will not deploy or will be limited to idle on landing. This means that the reverse thrust capability of the right engine is either not functioning properly or has been intentionally limited, and as a result, it will not provide the maximum reverse thrust during landing.Rate this question:
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- 12.
Where is engine oil quantity displayed?
- A.
The secondary engine indications
- B.
The primary engine indications
- C.
The status display
- D.
There is no flight deck display for engine oil quantity
Correct Answer
A. The secondary engine indicationsExplanation
The engine oil quantity is displayed on the secondary engine indications.Rate this question:
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- 13.
What malfunction, during ground start, will cause the autostart system to abort the start?
- A.
Low oil pressure
- B.
High oil temperature
- C.
Broken fanblade
- D.
Hot start
Correct Answer
D. Hot startExplanation
During ground start, a hot start refers to a situation where the combustion process inside the engine starts too early or too rapidly, causing excessive heat buildup. This can occur due to a variety of reasons such as incorrect fuel-to-air ratio, improper ignition timing, or a malfunctioning fuel control system. In such cases, the autostart system will abort the start to prevent any damage to the engine or surrounding components.Rate this question:
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- 14.
What is auto-relight?
- A.
Auto-relight provides flameout protection by activating the autostart system.
- B.
Auto-relight provides flameout protection by activating both ignitors.
- C.
Auto-relight opens the start valve automatically if the engine N2 decreases.
- D.
Auto-relight provides hung start protection by deactivating the ignitor.
Correct Answer
B. Auto-relight provides flameout protection by activating both ignitors.Explanation
Auto-relight is a system that is designed to provide flameout protection in an aircraft engine. When a flameout occurs, the auto-relight system activates both ignitors, which helps to reignite the fuel-air mixture and restore combustion in the engine. By activating both ignitors, the system ensures that there is a higher chance of successfully relighting the engine and preventing a complete shutdown. This feature is crucial for maintaining the safety and reliability of the aircraft's engine during flight.Rate this question:
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- 15.
What does the EICAS message APU SHUTDOWN indicate?
- A.
The APU is out of fuel.
- B.
The APU in cooldown mode.
- C.
The APU has automatically shut down.
- D.
The APU controller has shut down the packs.
Correct Answer
C. The APU has automatically shut down.Explanation
The EICAS message "APU SHUTDOWN" indicates that the APU (Auxiliary Power Unit) has automatically shut down. This means that the APU, which provides power to the aircraft when the engines are not running, has stopped operating without any manual intervention. This could be due to various reasons such as a fault or an abnormal condition detected by the APU controller, or reaching a predetermined limit set by the aircraft's systems.Rate this question:
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- 16.
What does the EICAS message APU LIMIT indicate?
- A.
The APU is out of fuel.
- B.
An APU limit has been exceeded.
- C.
The APU has automatically shut down.
- D.
The APU pneumatic output is limited.
Correct Answer
B. An APU limit has been exceeded.Explanation
The correct answer indicates that the EICAS message "APU LIMIT" is displayed when an APU limit has been exceeded. This means that the APU, or Auxiliary Power Unit, which provides power to the aircraft when the engines are not running, has exceeded its operational limits or parameters. This could be due to factors such as high temperature, excessive speed, or other abnormal conditions that could potentially damage the APU or affect its performance.Rate this question:
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- 17.
If the APU is in the attended mode, what fault causes an immediate automatic shutdown?
- A.
APU controller failure
- B.
High EGT
- C.
Low oil pressure
- D.
High oil temperature
Correct Answer
A. APU controller failureExplanation
If the APU is in the attended mode, an APU controller failure can cause an immediate automatic shutdown. This means that if the controller responsible for managing and controlling the APU malfunctions or fails, it will trigger a shutdown of the APU system. This is important because the APU is responsible for providing auxiliary power to the aircraft, so any failure in its controller can have significant implications for the aircraft's operations and safety.Rate this question:
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- 18.
What thrust reference mode indicates maximum rated takeoff thrust?
- A.
TO 1
- B.
D-TO 1
- C.
TO
- D.
D-TO
Correct Answer
C. TOExplanation
TO is the thrust reference mode that indicates maximum rated takeoff thrust. This mode is used for normal takeoff and provides the maximum thrust available for the aircraft during takeoff. D-TO and D-TO 1 are different thrust reference modes used for derated takeoff, where the thrust is intentionally reduced below the maximum rated thrust for various reasons such as engine life extension or noise reduction. Therefore, TO is the correct answer as it specifically refers to the mode that indicates maximum rated takeoff thrust.Rate this question:
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- 19.
What occurs if the required EEC signals are not available to operate the engines in the normal mode?
- A.
The EEC automatically uses the alternate mode.
- B.
Full rated thrust is automatically commanded on the affected engine.
- C.
The Autothrottle disconnects.
- D.
The affected engine goes to flight idle.
Correct Answer
A. The EEC automatically uses the alternate mode.Explanation
If the required EEC signals are not available to operate the engines in the normal mode, the EEC automatically switches to the alternate mode.Rate this question:
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- 20.
What occurs if the flight crew manually selects the EEC Alternate mode?
- A.
The engine operates in the soft alternate mode.
- B.
The EICAS message ENG CONTROL is displayed
- C.
Maximum and commanded N1 values are removed from the N1 indication.
- D.
Reference and target N1 are displayed on the N1 indication.
Correct Answer
D. Reference and target N1 are displayed on the N1 indication.Explanation
When the flight crew manually selects the EEC Alternate mode, the reference and target N1 values are displayed on the N1 indication. This means that the engine will operate according to the selected reference and target N1 values, rather than the maximum and commanded N1 values. The EICAS message ENG CONTROL is not displayed and the engine operates in the soft alternate mode, which is not mentioned in the correct answer.Rate this question:
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- 21.
What does the EICAS message ENG CONTROL L indicate?
- A.
Control for the left engine is in the alternate mode.
- B.
A fault is detected in the left engine control system.
- C.
Left engine speed is below idle.
- D.
A limit has been exceeded on the left engine.
Correct Answer
B. A fault is detected in the left engine control system.Explanation
The EICAS message ENG CONTROL L indicates that a fault has been detected in the left engine control system. This means that there is an issue with the system responsible for controlling the left engine, which could potentially affect its performance or functionality.Rate this question:
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- 22.
What does the EICAS message ENG AUTOSTART R indicate?
- A.
The right fuel control switch is in RUN at low engine RPM with the autostart switch OFF.
- B.
The right engine start valve is open when commanded close.
- C.
Autostart has failed to start the left engine.
- D.
Autostart is attempting to start the right engine, wait for further indications.
Correct Answer
A. The right fuel control switch is in RUN at low engine RPM with the autostart switch OFF. -
- 23.
What does the EICAS message ENG STARTER CUTOUT L indicate?
- A.
The left engine autostart switch is OFF.
- B.
Autostart has failed to start the left engine.
- C.
The left engine start/ignition selector remains in the START position or the start valve is open when commanded closed.
- D.
The left fuel control switch is in RUN at low engine RPM with the autostart switch OFF.
Correct Answer
C. The left engine start/ignition selector remains in the START position or the start valve is open when commanded closed.Explanation
The EICAS message ENG STARTER CUTOUT L indicates that the left engine start/ignition selector remains in the START position or the start valve is open when commanded closed.Rate this question:
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- 24.
Which of the following is not correct about the EGT Start Limit Line on the EGT Indicator?
- A.
The displayed line is red.
- B.
The line displays with the fuel control switch in CUTOFF
- C.
The line displays with N2 RPM below idle.
- D.
The line displays at all times on the ground.
Correct Answer
D. The line displays at all times on the ground.Explanation
The EGT Start Limit Line on the EGT Indicator is used to indicate the maximum allowable temperature for engine starting. It is a reference line that helps the pilot monitor the engine temperature during the start-up process. The line is displayed in red to draw attention to it and ensure that the pilot does not exceed the temperature limit. The line is only displayed when the fuel control switch is in CUTOFF and N2 RPM is below idle. Therefore, the statement that the line displays at all times on the ground is incorrect.Rate this question:
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- 25.
Which of the following is not correct about the EICAS In-Flight Start Envelope display?
- A.
The engine RPM is below idle and the fuel control switch is in RUN.
- B.
The In-Flight Start Envelope display shows the airspeed range foe an in-flight start at the current flight level when the airplane is below the maximum flight level for an in-flight start.
- C.
The respective engine fire switch is in.
- D.
The In-Flight Start Envelope display is magenta.
Correct Answer
A. The engine RPM is below idle and the fuel control switch is in RUN.Explanation
The EICAS In-Flight Start Envelope display does not show the airspeed range for an in-flight start when the engine RPM is below idle and the fuel control switch is in RUN.Rate this question:
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- 26.
Which of the following does not happen when the Fuel Control switch is placed to RUN with Autostart ON?
- A.
The engine fuel valve is armed.
- B.
The spar fuel valve is armed.
- C.
The engine ignitor(s) is/are armed.
- D.
The EEC opens the valve and turns on the ignitor(s) when required.
Correct Answer
B. The spar fuel valve is armed.Explanation
When the Fuel Control switch is placed to RUN with Autostart ON, the engine fuel valve is armed, the engine ignitor(s) is/are armed, and the EEC opens the valve and turns on the ignitor(s) when required. However, the spar fuel valve is not armed when the Fuel Control switch is placed to RUN with Autostart ON.Rate this question:
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- 27.
Which of the following does not display the Secondary Engine Indications?
- A.
A secondary engine Parameter is exceeded
- B.
The displays initially receive electrical power.
- C.
A Fuel Control switch is moved to CUTOFF on the ground.
- D.
A Fuel Control switch is moved to CUTOFF in flight.
Correct Answer
C. A Fuel Control switch is moved to CUTOFF on the ground.Explanation
Moving the Fuel Control switch to CUTOFF on the ground does not display the Secondary Engine Indications. This is because the Secondary Engine Indications are only displayed when a secondary engine parameter is exceeded, when the displays initially receive electrical power, or when the Fuel Control switch is moved to CUTOFF in flight.Rate this question:
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- 28.
Which statement about a manual engine start is correct?
- A.
A manual start is possible with the Autostart system switch in the ON position.
- B.
Manual start procedures are part of the normal Engine Start procedure.
- C.
The EEC controls when fuel is first provided to the engine.
- D.
The EICAS message ENG AUTOSTART is displayed if the fuel control switch is moved to RUN before the rpm specified in the manual start procedure.
Correct Answer
D. The EICAS message ENG AUTOSTART is displayed if the fuel control switch is moved to RUN before the rpm specified in the manual start procedure.Explanation
If the fuel control switch is moved to RUN before the rpm specified in the manual start procedure, the EICAS message ENG AUTOSTART is displayed. This means that the engine is being manually started and the Autostart system is not being used.Rate this question:
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- 29.
Which statement about engine ignition is correct?
- A.
The EEC alternates ignitors for successive starts on the ground.
- B.
Standby AC power is the normal power source.
- C.
Each engine has four ignitors.
- D.
Engine Auto-Relight requires the Autostart system to be on.
Correct Answer
A. The EEC alternates ignitors for successive starts on the ground.Explanation
The correct answer is that the EEC alternates ignitors for successive starts on the ground. This means that during consecutive engine starts, the Engine Electronic Control (EEC) system switches between different ignitors to ensure proper ignition. This helps to distribute wear and tear evenly among the ignitors and ensures reliable engine ignition.Rate this question:
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- 30.
Which statement about the thrust reversers is correct?
- A.
The autopilot disengages when the reverse thrust levers are pulled back to the interlock position.
- B.
The auto speedbrakes deploy when the reverse thrust levers are pulled back to the interlock position.
- C.
The reverse thrust levers can be raised only when the forward thrust levers are in the idle position and the radio altitude is less than 10 feet.
- D.
The reverser translating sleeves move aft assisted by fan air flowing through stationary cascade guide vanes.
Correct Answer
B. The auto speedbrakes deploy when the reverse thrust levers are pulled back to the interlock position.Explanation
When the reverse thrust levers are pulled back to the interlock position, the auto speedbrakes deploy. This means that the speedbrakes automatically extend when the thrust reversers are activated, providing additional drag to help slow down the aircraft during landing. This helps to reduce the workload on the pilot and improves the overall effectiveness of the thrust reversers in assisting with deceleration.Rate this question:
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- 31.
Which statement about the thrust reversers operation is not correct?
- A.
The EICAS message ENG REV LIMITED is displayed if the reverser cannot deploy when commanded.
- B.
Not all conditions limiting or preventing reverse thrust can be detected before reverse thrust is selected.
- C.
The amber REV indication changes to green REV when the reverser interlock is released.
- D.
The reverse thrust levers can be limited from moving beyond the interlock position by conditions that limit or prevent reverse thrust.
Correct Answer
C. The amber REV indication changes to green REV when the reverser interlock is released.Explanation
The amber REV indication changes to green REV when the reverser interlock is released. This statement is incorrect because the color of the REV indication does not change when the reverser interlock is released. The REV indication remains amber throughout the operation of the thrust reversers.Rate this question:
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- 32.
Which statement about the Engine Failure Alert system is not correct?
- A.
A red ENG FAIL is displayed on the PFD if actual thrust is less than commanded thrust during takeoff with airspeed between 65 knots and V1.
- B.
The EICAS message ENG FAIL (L or R) is displayed if an engine unexpectedly decelerates to less than idle speed.
- C.
The EICAS message ENG FAIL (L or R) is displayed until the engine recovers or the fuel control switch is moved to CUTOFF.
- D.
The EICAS message ENG FAIL (L or R) is displayed if actual thrust is not increasing to commanded thrust and airspeed is below V1.
Correct Answer
D. The EICAS message ENG FAIL (L or R) is displayed if actual thrust is not increasing to commanded thrust and airspeed is below V1.Explanation
The correct answer is that the EICAS message ENG FAIL (L or R) is displayed if actual thrust is not increasing to commanded thrust and airspeed is below V1. This means that if the engine is not producing the expected level of thrust and the aircraft's airspeed is below V1 (the decision speed during takeoff), the ENG FAIL message will be displayed. This indicates a potential engine failure or malfunction.Rate this question:
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- 33.
Which statement about the airborne vibration monitoring system is not correct?
- A.
Airborne vibration indications have limiting values that must not be exceeded.
- B.
High vibration levels automatically display the secondary engine parameters.
- C.
No flight crew actions are based solely on vibration indications.
- D.
High N1 vibration indication would most likely accompanied by tactile vibration.
Correct Answer
A. Airborne vibration indications have limiting values that must not be exceeded. -
- 34.
Which statement about the engine oil system is not correct?
- A.
There is no minimum oil quantity
- B.
Low oil quantity cannot automatically display the secondary engine display.
- C.
Low oil quantity is displayed as black numbers on a white background.
- D.
There are no flight crew procedures based solely on response to low oil quantity.
Correct Answer
B. Low oil quantity cannot automatically display the secondary engine display.Explanation
The statement "Low oil quantity cannot automatically display the secondary engine display" is incorrect. In an engine oil system, low oil quantity can indeed trigger an automatic display on the secondary engine display. This display is typically designed to alert the flight crew about the low oil quantity and prompt them to take appropriate actions.Rate this question:
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- 35.
Which statement about the auxiliary power unit is not correct?
- A.
The APU can be started by an electric start motor or an air turbine starter.
- B.
The main airplane battery powers the APU fire detection system.
- C.
The APU battery powers the electric start motor, the inlet door and the fuel valve.
- D.
The air turbine starter has priority over the electric start motor.
Correct Answer
C. The APU battery powers the electric start motor, the inlet door and the fuel valve.Explanation
The APU battery does not power the electric start motor, the inlet door, and the fuel valve.Rate this question:
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- 36.
Which statement about the auxiliary power unit starting is correct?
- A.
During APU start on the ground, starting fuel is supplied from the center tank DC fuel pump until AC power is available.
- B.
The starter engages immediately. When the air inlet door reaches full open, fuel and ignition are provided.
- C.
With the APU generator switch in the OFF position, automatic APU start in the event that both AC transfer busses lose power is inhibited
- D.
On the ground, the APU can be started with no pumps operating.
Correct Answer
D. On the ground, the APU can be started with no pumps operating.Explanation
The APU can be started on the ground even if no pumps are operating.Rate this question:
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Mar 21, 2023Quiz Edited by
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