Fuel Flashcards
(31 cards)
Which fuel tank can you dump from?
Center
True or False. Individual fuel tank quantity indications are calculated by the fuel quantity processor. There is a separate calculation for the total fuel quantity indication which is also displayed on the FMC.
True
What indications are on the fuel quantity indicator panel?
L,C, and R tank quantities, fuel temp and totalizer.
Fuel from the wingtip surge tanks is drained into which tank?
Center Tank
Fuel for the APU is supplied by which tank?
Left Main Tank
Where does the total fuel indication come from?
Fuel Quantity Processor
What do boxes on the PERF INIT page indicate on the FUEL QUANTITY line?
The FMC’s are not receiving fuel quantity data.
Which pump is supplying fuel to the APU with the APU generator powering the airplane.
Left Forward Boost Pump
With the engines running, when will the center pump pressure lights illuminate?
When pump pressure is low or no usable fuel in the center tank with the center pumps on.
The FUEL CONFIG light will illuminate:
When the fuel is low in either main tank - <2200#
When main tanks differ by 2000# (+/- 500#)
With center pump switches off and 1200# or more in the center tank.
When the fuel control switch is moved from cutoff to run which fuel valves open?
Spar valve and Engine valve.
Is it normal for the LOW PRESSURE light to be extinguished in the Left FWD fuel pump during preflight?
Yes, but only when the APU is operating.
If you are airborne with both engines operating, what do the two LOW PRESSURE lights indicated on the center tank pumps?
Center tank fuel have been used.
Can the left forward fuel pump be switched off if it is supplying fuel to the APU on the ground with the APU running.
No, the pump cannot be turned off.
What action is required to activate the DC Fuel Pump when starting the APU with battery power only.
No action is required, the DC fuel pump start automatically.
How can you tell if the fuel pump switch is off?
The flow bar and “ON” will not be displayed.
What is the position of the Crossfeed valve with the flow bar out of view?
Switch is off and the valve is closed.
What is the status of a main tank fuel pump with the flow bar and ON in view, but with a LOW PRESSURE light on?
Turned on - output pressure is low.
If you are airborne with both engines operating, what do the two LOW PRESSURE lights indicate for the center tank pumps?
Center tank fuel has been used.
Is it a normal indication for the Low Pressure light to extinguish, prior to APU start with no external power?
Yes, the DC pump will start automatically when the APU Start selector is moved to the START position.
With the engines running, when will the center pump LOW PRESSURE lights illuminate?
When pump pressure is low or no usable fuel is in the center tank with the center pumps on.
What is the position of the Crossfeed switch and valve, with the flow bar visible, and the VALVE light extinguished?
Switch is ON and the valve is open.
True or False. The FUEL CONFIG light illuminates when a significant fuel imbalance exists between the main tanks.
True
True or False. The FUEL CONFIG light illuminates when fuel is low.
True
