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61 Cards in this Set
- Front
- Back
The APU may be operated with APU bleed only up to a maximum altitude of
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17,000ft
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Maximum continuous EGT for Garrett APU operation is?
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710 degrees C
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The APU LOW OIL PRESSURE light is
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Disarmed when the APU switch is in the OFF position.
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The APU will automatically shut-down
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When the battery switch is placed OFF on the ground only.
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The overspeed light will illuminate when a start is aborted prior to the APU reaching normal operating speed and
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Will extinguish when the APU switch is placed to START again.
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Should the APU switch fail to shut-off the APU
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Pull up the APU Fire Warning Switch.
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If the APU runs down due to fuel starvation, the Master Caution annunciation system will show
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APU and services being operated by the APU.
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The APU fire warning system gives aural and visual warnings
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In the flight deck and main wheel well.
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During a normal APU start
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The amber LOW OIL PRESSURE light is lluminated until the APU oil pressure is normal (approx. 35% RPM).
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The APU fuel heater
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Is automatically operated and uses the APU compressor bleed air.
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If an APU fire warning is sensed
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The APU will shut-down automatically.
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The Garrett and Sundstrand APU generators are rated at:
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45 KVA's in-flight and 55KVA's on the ground.
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How is the APU switched onto the AC electrical system?
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By two APU switches individually operated.
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Which of the following statements is correct? (737 - 1-500)
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The APU can power Generator Bus 1 with ground power connected to Generator Bus 2.
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Maximum start EGT for Garrett APU operation is?
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760 degrees C
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The maximum aircraft altitude for both APU bleed and electrical load is?
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10,000ft
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The maximum aircraft altitude for APU electrical load is?
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35,000ft Garrett; 37,000ft Sundstrand; 41,000 Allied Signal.
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When does the APU fuel solenoid valve open?
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When oil pressure has reached 4psi.
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The APU Electrical Generator and APU Oil Cooler are cooled by
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A gear driven fan.
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With an APU aborted start on the ground, another start may be attempted
immediately |
But 5 minutes cooling is required between the second and third attempt and a wait of one hour is required after the third start attempt.
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If the APU generator is providing electrical power to the aircraft while on the ground,
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The galley electrical loads will automatically be shed if the total electrical power requirements exceed design limits.
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Illumination of the APU DET INOP light
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Activates master caution "OVHT/DET".
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APU bleed air
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Is not allowed to be used for wing anti-ice.
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The APU oil LOW QUANTITY light
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Is only armed when the APU start switch is out of OFF.
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If an APU fire warning is sensed
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The APU will shut-down automatically.
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The Garrett and Sundstrand APU generators are rated at:
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55 KVA's either in-flight or on the ground.
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How is the APU switched onto the AC electrical system?
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By two APU switches individually operated.
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Which of the following statements is correct? (737 - 1-500)
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The APU can power Generator Bus 1 with ground power connected to Generator Bus 2.
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Maximum start EGT for Garrett APU operation is?
|
760 degrees C
|
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The APU fuel heater
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Is automatically operated and uses the APU compressor bleed air.
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The maximum aircraft altitude for APU electrical load is?
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35,000ft Garrett; 37,000ft Sundstrand; 41,000 Allied Signal.
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The overspeed light will illuminate when a start is aborted prior to the APU reaching normal operating speed and
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Will extinguish when the APU switch is placed to START again.
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The maximum aircraft altitude for both APU bleed and electrical load is?
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10,000ft
|
|
During a normal APU start
|
The amber LOW OIL PRESSURE light is lluminated until the APU oil pressure is normal (approx. 35% RPM).
|
|
The APU fire warning system gives aural and visual warnings
|
In the flight deck and main wheel well.
|
|
The APU may be operated with APU bleed only up to a maximum altitude of
|
17,000ft
|
|
Should the APU switch fail to shut-off the APU
|
Pull up the APU Fire Warning Switch.
|
|
With an APU aborted start on the ground, another start may be attempted
immediately |
But 5 minutes cooling is required between the second and third attempt and a wait of one hour is required after the third start attempt.
|
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The APU will automatically shut-down
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When the battery switch is placed OFF on the ground only.
|
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The APU LOW OIL PRESSURE light is
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Disarmed when the APU switch is in the OFF position.
|
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Maximum continuous EGT for Garrett APU operation is?
|
710 degrees C
|
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If the APU runs down due to fuel starvation, the Master Caution annunciation system will show
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APU and services being operated by the APU.
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The APU is inadvertently left powering both GEN buses. At lift off, the APU will continue to power both buses until one side is depowered.
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True.
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Can the APU get fuel without any AC power?
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Yes via suction feeding.
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During a normal APU start, the APU Low Oil Press light should be out.
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False.
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Which of the following is a desirable APU start sequence?
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Batt switch ON; Aft #1 fuel pump ON; Fire check DONE; APU bleed OFF.
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Which of the following will cause the APU overspeed light to illuminate?
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Turbine overspeed.
Aborted start. Self-test failure detected. |
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Prior to starting the APU, you notice that the APU over speed light is ON. Which of the following is FALSE?
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Do not attempt to start the APU.
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When does the APU fuel solenoid valve open?
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When oil pressure has reached 4psi.
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Can you power both GEN buses with the APU while in flight?
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Yes if the APU is inadvertently left powering both GEN buses prior to lift off.
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The APU Electrical Generator and APU Oil Cooler are cooled by
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A gear driven fan.
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What are the APU start limits?
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3 starts with 1 minute rest in between; 5 minute rest after 3rd try.
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The APU is running. Which of the following will cause an automatic shutdown of the APU?
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Low oil pressure, fault, or overspeed.
Fire warning. APU exceeds preset EGT limits. |
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Will the APU shut down if you turn off the Battery switch (Aircraft on the ground)?
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Yes
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The reason the APU shuts down when the battery switch is turned off (on the ground) is because you lose fire protection capability.
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False. You loose detection.
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What happens when you get an APU fire warning?
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APU fuel valve closes; APU bleed valve closes; APU inlet door closes; APU fire bottle is armed; Field Relay is opened.
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The APU oil LOW QUANTITY light
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Is only armed when the APU start switch is out of OFF.
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APU bleed air
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Is not allowed to be used for wing anti-ice.
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Illumination of the APU DET INOP light
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Activates master caution "OVHT/DET".
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If the APU generator is providing electrical power to the aircraft while on the ground,
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The galley electrical loads will automatically be shed if the total electrical power requirements exceed design limits.
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Prior to starting the APU, the OVERSPEED light is ON. You start the APU. What caused the OVERSPEED light to illuminate?
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If you shut down the APU after it reaches full speed and the OVERSPEED light comes on again, then you had a legitimate APU fault.
If you shut down the APU after it reaches full speed and the light stays off, you had an aborted start. |