Fuel Flashcards
When fuel is stored in the center and main tanks, both engines operating, all boost pumps on, fuel is supplied to the engines from ____.
a. the No. 2 main tank
b. both main tanks
c. the center tank
d. the No. 1 main tank
c. the center tank
The main fuel tanks are serviced through ____.
a. either the over wing or single point refueling receptacles
b. over wing fueling receptacles
c. the airplane fuel transfer system from the center tank only
d. a single point refueling receptacle
d. a single point refueling receptacle
Each engine can be fed fuel from either or both main tanks through the fuel _____ valve.
a. shutoff
b. crossfeed
c. bypass
d. transfer
b. crossfeed
With all fuel pumps ON, why does the center tank provide the fuel to the engines?
a. The center tank pumps are closer to the engine feed pumps.
b. The center tank pumps provide more pressure.
c. The fuel crossfeed valve is open.
d. One-way check valves prevent wing tanks from feeding.
b. The center tank pumps provide more pressure.
With fuel pumps turned OFF, the APU fuel is suction-fed from ____.
a. the No. 1 main tank
b. the Center tank
c. the No. 2 main tank
d. Only what remains in the fuel lines. The APU cannot be suction-fed from a fuel tank
a. the No. 1 main tank
Pulling a fire handle or placing an engine start lever in CUTOFF closes ____.
a. the engine fuel shutoff valve only
b. the spar fuel shutoff valve only
c. both the spar fuel shutoff valve and the engine fuel shutoff valve
d. both the spar fuel shutoff valve and the EEC shutoff valve
c. both the spar fuel shutoff valve and the engine fuel shutoff valve
The Center Tank Scavenge Pump will activate when ____.
a. #2 Main Tank has 4500 pounds
b. #1 Main Tank is about half full
c. Center Tank quantity reaches 3000 pounds
d. #1 Main Tank has 5800 pounds
b. #1 Main Tank is about half full
How many positions are there on the fuel flow/rate used switch?
a. Two - RATE, USED
b. Three - RESET, RATE, USED
c. Four - RATE, USED, RESET, REMAINING
d. None of the above
b. Three - RESET, RATE, USED
A bright blue Crossfeed VALVE OPEN Light means the Crossfeed Valve is ____.
a. in transit or the valve position and CROSSFEED Selector disagree
b. closed
c. open
d. in agreement with the position commanded
a. in transit or the valve position and CROSSFEED Selector disagree
An amber FILTER BYPASS Light means ____.
a. impending fuel filter bypass due to a contaminated filter
b. impending fuel filter bypass due to ice
c. the fuel filter is being bypassed because of excessive pump pressure
d. the fuel filter is being bypassed because of low pump pressure
a. impending fuel filter bypass due to a contaminated filter
The Fuel Flow Used readout is updated for the next flight ____.
a. upon touchdown through the ground sensing switch
b. at brake release prior to pushback
c. automatically whenever the airplane is refueled
d. by use of the FUEL FLOW Switch moved to RESET
d. by use of the FUEL FLOW Switch moved to RESET
IMBAL means that the main tanks differ by more than _____ pounds.
a. 2,000
b. 800
c. 1,000
d. 1,500
c. 1,000
CONFIG means that either engine is running and the fuel in the center tank is more than _____ pounds and both center tank pumps are producing _____ pressure.
a. 1,600/low
b. 1,000/low
c. 1,600/high
d. 1,000/high
a. 1,600/low
Will the CONFIG, IMBAL or LOW annunciation on the fuel gauges cause the MASTER CAUTION lights to flash?
a. Yes
b. No
c. Yes if 10% below the trigger values of the annunciation
d. Yes, but only during RECALL
b. No
The Fuel LOW Alert indicates fuel quantity in the related main tank is less than _______ pounds.
a. 2,000
b. 1,000
c. 1,600
d. 800
a. 2,000
The aircraft is in level cruise flight with this light illuminated. Both main tanks are full, and usable center tank fuel is 5000 lbs. All other conditions are normal. Which statement is valid?
a. The #1 engine will begin feeding from the #1 Main Fuel Tank.
b. The #2 engine will begin feeding from the #2 Main Fuel Tank.
c. Both engines will continue to feed from the Center Fuel Tank.
d. The #1 engine will automatically start feeding from the #2 Main Fuel Tank.
c. Both engines will continue to feed from the Center Fuel Tank.
At the moment this Low Pressure light illuminated, which of the following statements is also true?
a. The Master Caution light will illuminate.
b. The Center Tank Scavenge Jet Pump system will no longer operate if needed.
c. Once the Center Fuel Tank is empty, there is no fuel pump pressure to #1 engine.
d. Fuel Crossfeed capability is not available
b. The Center Tank Scavenge Jet Pump system will no longer operate if needed
The Fuel Control Panel is configured as shown. The center tank is empty and both main tank fuel quantities are above 8000 lbs. How does this affect the current operation of the fuel system?
a. No effect. The #1 Main Tank AFT pump pressure is sufficient to supply the engine.
b. Crossfeeding fuel from the #2 Right Main Tank is required to supply sufficient pressure for normal operation of engine #1.
c. Descend to a lower altitude to assist engine suction feed and prevent flame out of #1 engine.
d. Engine #1 must be shut down.
a. No effect. The #1 Main Tank AFT pump pressure is sufficient to supply the engine.
The aircraft is in level cruise flight and all fuel tank pump switches are ON. Both main tanks are full, and useable center tank fuel is 7000 lbs. All other conditions are normal. Which statement is valid with this light illuminated?
a. Both engines are still receiving fuel from the Center Fuel Tank.
b. The #1 engine is now being gravity (suction) fed.
c. The #1 Main Fuel Tank is now supplying fuel to the #1 engine.
d. You have lost all fuel pressure to the #1 engine.
c. The #1 Main Fuel Tank is now supplying fuel to the #1 engine.
The aircraft is in level cruise flight and all fuel tank pump switches are ON. Both main tanks are full and useable center tank fuel is 7000 lbs. If no action is taken, what will happen to the fuel quantity in each main tank?
a. The #2 Main Tank fuel quantity will remain constant and the #1 Main Tank fuel quantity will increase.
b. The #1 Main Tank fuel quantity will remain constant and the #2 Main Tank fuel quantity will decrease.
c. Both main tank fuel quantities will start to decrease.
d. The #1 Main Tank fuel quantity will start to decrease and the #2 Main Tank fuel quantity will remain constant.
d. The #1 Main Tank fuel quantity will start to decrease and the #2 Main Tank fuel quantity will remain constant.
Review the appropriate QRH procedure. It states if one center tank Low Pressure Light is illuminated, the Crossfeed Selector should be placed in open. Why is this action directed by the ORH?
a. An Airworthiness Directive mandates it.
b. This will cause the Right Center Tank Fuel Pump Low Pressure light to illuminate.
c. To prevent a fuel quantity imbalance.
d. The left center tank pump switch must be turned OFF, leaving insufficient pressure to supply center tank fuel to both engines unless the Crossfeed is open.
c. To prevent a fuel quantity imbalance
With the airplane in flight, what does it mean when this light illuminates?
a. The fuel temperature is too high.
b. There is no fuel pump pressure to the #1 engine.
c. An impending fuel filler bypass on #2 engine.
d. An impending fuel filter bypass on #1 engine.
d. An impending fuel filter bypass on #1 engine
What could cause this light to illuminate?
a. Ice formation on the Hydro Mechanical Unit (HMU).
b. Solid contaminants blocking the fuel filter.
c. Solid contaminants in the oil filler.
d. The EEC has moved to the alternate (ATLN) mode
b. Solid contaminants blocking the fuel filter.
What action should be taken in flight when this light illuminates?
a. Turn ON the fuel heater.
b. Tum OFF the fuel pump pressure to the respective engine.
c. Consider landing at the nearest suitable airport.
d. No action required unless the same light on the other engine comes on, then land at the nearest suitable airport.
d. No action required unless the same light on the other engine comes on, then land at the nearest suitable airport.
