Fuel

Question 1

Where is the fuel stored?

Answer 1

Two integral wing tanks

Question 2

How many pumps are found in each tank and what are they called?

Answer 2

Three; one ejector pump, one scavenge ejetor pump, one electric fuel boost pump

Question 3

What is normally used to supply fuel from the wing to the engine fuel control unit in flight?

Answer 3

Ejector pumps

Question 4

How is the primary fuel ejector pump powered?

Answer 4

Motive flow from the respective engine

Question 5

What is the primary purpose of the scavenge jet pump?

Answer 5

Maintains the fuel level in the ocllector tank ensuring a constant flow of fuel to the engine during normal flight

Question 6

When is the electric fuel pump (boost pump) activated if switch is in auto position?

Answer 6

Engine start, crossfeed, low fuel pressure (primary ejector pump fails)

Question 7

What ensures that the differential pressure between the tank and ambient remains within structural limits and prevents fuel spillage?

Answer 7

Fuel vent system (including a NACA air inlet/outlet)

Question 8

How is crossfeeding performed?

Answer 8

Select the XFEED switch to the tank with the low fuel quantity. This opens the crossfeed valve and turns on the DC boost pump in the wing tank with the higher fuel level. Both engines will then be getting fuel from the high tank.

Question 9

What is the restriction on crossfeed operation?

Answer 9

Shall not be performed during takeoff and landing

Question 10

When fuel becomes balanced and the crossfeed valve is still open, what EICAS message will be annunciated?

Answer 10

FUEL EQUAL

Question 11

Will the total tank quantity indication be lost if only one wing tank quantity indicator fails?

Answer 11

Yes

Question 12

The fuel shutoff valves are normally open. What is the only way to close one of these valves?

Answer 12

Pushing the fire shutoff button.

Question 13

What owuld cause a “FUEL LO LEVEL” EICAS message?

Answer 13

310 lbs of fuel remaining in the respective tank

Question 14

What would cause a “FUEL IMBALANCE” EICAS message?

Answer 14

220 lb imbalance

Question 15

Is there de-fueling capability?

Answer 15

Yes, by means of a dump valve located under each wing

Question 16

While fueling, what monitors the fuel quantity in the tanks and controls refueling flow into each tank?

Answer 16

Electronic Fuel Control Unit (EFCU)

Question 17

How long is the maximum refueling time from empty to full?

Answer 17

Less than 12 min, at 50 psig

Question 18

Explain the two critical tests that should be accomlished on the fueling control panel before re-fueling starts?

Answer 18

Lamp test - When the LAMP TEST switch is held up, the LH TANK and RH TANK indicator lights stay on or come on according to the status of these lights, the FAIL indicator turns on and the digits light up.

Shut-off test - When the SHUT-OFF TEST switch is held up during pressure refueling operation, the LH TANK and RH TANK indicator lights must coem on, indicating that the shut-off valve closes, and the FAIL indicator light must be off.

Question 19

What action is necessary to accomplish on the refueling panel if external power is not being utilized?

Answer 19

The POWER SWITCH must be selected to BATT.

Question 20

How much fuel is the 45-min IFR reserve? (LIMITATION)

Answer 20

1121 lbs

Question 21

What is the minimum fuel for release? (LIMITATION)

Answer 21

1880 lbs

Question 22

What is the hot spare fuel load? (LIMITATION)

Answer 22

3400 lbs

Question 23

What is emergency fuel?

Answer 23

759 lbs

Question 24

What is the maximum fuel that could fit into the tanks? (optimum temp/pressure)

Answer 24

5401 lbs