Systems - Fuel Flashcards
The fuel system is designed so normal fuel feed sequencing is
(FM 8.120.10.1)
Automatic.
What is the maximum allowable fuel imbalance between inner tanks (Inflight and Landing) if the heavier tank is full? (FM 8.120.20.4)
3,300 pounds
(319/320) In flight with slats retracted, how is fuel sequenced to the engines with fuel in all tanks? (FM 8.120.20.2)
Center tank pumps feed the engines first.
(319/320) In flight, with fuel MODE SEL in AUTO and fuel in the center tank, the center tank pumps (FM 8.120.20.2)
Run only if slats are retracted.
(319/320) With the fuel MODE SEL switch in AUTO, both center tank pumps run (if there is fuel in the tank) for _______ minute(s) after each engine reaches idle to verify operation. (FM 8.120.20.2)
2
When will the center tank begin to feed the engines after takeoff (if there is fuel in the center tank)? (FM 8.120.20.2)
When the slats are retracted.
(319/320) In flight, with fuel MODE SEL in MAN, and the CTR TK pumps ON, what is the effect on the center tank pumps? (FM 8.120.20.2)
The center tank pumps run continuously until turned off with the
CTR TK pump switches.
A fuel pump FAULT light indicates (FM 8.120.20.1)
Fuel pump low pressure.
On NEO aircraft, a fault light on the center tank transfer pumps is caused by ______. (Ref. 8.120.20.2)
The associated wing tank overflows
When should a tripped wing tank fuel pump circuit breaker be reset?
(FM 5.40.1)
Never
A fuel MODE SEL FAULT light indicates (FM 8.120.20.2)
Center tank has more than 550 pounds of fuel and the left or right wing tank has less than 11,000 pounds.
The crossfeed valve is normally (FM 8.120.20.5)
Closed.
What do double dashes over the last two digits of the fuel on board (FOB) indication mean? (FM 8.120.20.4)
The fuel quantity indication is still operative, but inaccurate.
Which of the following would cause an amber half box to appear around the E/WD FOB display when the fuel quantity is not fully usable?
(FM 8.120.20.7)
Transfer valve failure.
Engines can be gravity fed (FM 8.120.10.3)
From the wing tanks only.
Each vent surge and inner wing tank is equipped with an over-pressure burst disk that (8.120.10.2)
Ruptures if the internal and external pressure differential exceeds a predetermined value.
If a fuel imbalance greater than 3300 pounds is detected, indications of the wing inner and outer tanks with the highest fuel level
(FM 8.120.20.4)
Pulse green.
(319/320) A low level fuel warning may be triggered during steep descents, accelerations or decelerations due to (FM 8.120.10.1)
The transfer valves opening with more than 1650 pounds of
fuel in each inner tank.
(319/320) When either inner wing compartment fuel quantity reaches 1650 pounds (FM 8.120.10.1)
At least one transfer valve in each wing opens.
The fuel recirculation system uses fuel supplied to each engine for cooling the (FM 8.120.10.2)
IDG oil.
What happens when the recirculation fuel has filled a wing tank and the center tanks are supplying fuel to the engines? (FM 8.120.10.2)
The center tank pump shuts off until 1100 pounds of fuel has been burned out of the wing tank.
(319/320) IDG heat exchanger return fuel is routed to the fuel return valve and then to the (FM 8.120.10.2)
Wing tank outer compartments.
