Fuel

Question 1

If there is fuel in the center tank, it is used before main tank fuel because:
a) The center tank check valves open at a lower differential pressure than the main tank
check valves.
b) The center tank boost pumps have a higher output pressure than the main tank
pumps.
c) The Fuel Control Computer (FCC) monitors quantity of each tank. When there is less
than 726 kgs of fuel in the center tank, the FCC will switch on the main tank boost
pumps.
d) The main tank pumps cannot produce pressure until the center tank LOW
PRESSURE lights illuminate and the center tank pumps are switched off.

Answer 1

b) The center tank boost pumps have a higher output pressure than the main tank
pumps.

Question 2

The left forward fuel pump is running. The center tank scavenge jet pump operates
when:
a) Both centre Tank Fuel Pump Switches are turned off.
b) The No. 1 main fuel tank is about ½ full.
c) The centre tank is about ½ full.
d) The scavenge pump is always operating.

Answer 2

b) The No. 1 main fuel tank is about ½ full.

Question 3

During pre-flight the center tank pumps are off and there is 1000 kg of fuel in the
center tank. The CDS will display:
a) A “LOW PRESS” indication after engine start.
b) A “LOW PRESS” indication prior to engine start.
c) A “CONFIG” indication after engine start.
d) A “CONFIG” indication prior to engine start.

Answer 3

c) A “CONFIG” indication after engine start.

Question 4

The Fuel imbalance (“IMBAL”) indication is displayed on the CDS:
a) When a main tank imbalance of more than 453 kg exists, provided the aircraft is in
flight.
b) When a main tank imbalance of more than 453 kg exists, both in flight and on the
ground.
c) When one center tank pump is inoperative and the crossfeed valve is closed.
d) Both B and C are correct.

Answer 4

a) When a main tank imbalance of more than 453 kg exists, provided the aircraft is in
flight.

Question 5

During flight both center tank fuel pump LOW PRESSURE lights illuminate due to a
failure of both center tank pumps.
There is still 320 kg of fuel in the center tank. On the CDS:
a) A “LOW” indication is displayed.
b) A “CONFIG” indication is displayed.
c) Fuel quantity is replaced by dashes.
d) No fuel alert indication will be displayed.

Answer 5

d) No fuel alert indication will be displayed.

Question 6

The accuracy of the fuel quantity indicators is:

a) ± 1.5 % of the full-scale reading.
b) ± 2.0 % of the full-scale reading.
c) ± 2.5 % of the full-scale reading.
d) ± 3.0 % of the full-scale reading.

Answer 6

c) ± 2.5 % of the full-scale reading.

Question 7

Fuel for the APU is

a) Supplied from the left side of the fuel manifold, if the AC fuel pumps are operating.
b) Supplied from the right side of the fuel manifold, if the AC fuel pumps are operating.
c) Suction fed from both main fuel tanks.
d) Both A and C are correc

Answer 7

a) Supplied from the left side of the fuel manifold, if the AC fuel pumps are operating.

Question 8

What is the maximum fuel imbalance for taxi?

a) 426 kgs.
b) 453 kgs.
c) 478 kgs.
d) 496 kgs.

Answer 8

b) 453 kgs.

Question 9

Statements:
1) Regardless of fuel quantity in the center tank, the FUEL PUMP LOW PRESSURE
lights will not illuminate when a center tank fuel pump is switched to OFF.
2) In the main tank, failure of a fuel pump will illuminate the MASTER CAUTION and
FUEL system annunciator light.
a) Only statement 1 is correct.
b) Only statement 2 is correct.
c) Both statements are correct.
d) No statement is correct.

Answer 9

a) Only statement 1 is correct.

Question 10

The engine fuel shutoff valve:
a) Is controlled by both the engine fire warning switch and the engine start lever;
however, the spar fuel shutoff valve is controlled only by the engine start lever.
b) Is the only fuel shutoff with an associated blue light on the forward overhead fuel
panel.
c) And the spar fuel shutoff valve requires AC power to operate.
d) And the spar fuel shutoff valve closes whenever their respective engine fire warning
switch is pulled or engine start lever is placed to CUTOFF.

Answer 10

d) And the spar fuel shutoff valve closes whenever their respective engine fire warning
switch is pulled or engine start lever is placed to CUTOFF.

Question 11

There are CDS fuel alert indications for:
a) Fuel quantity low in the main tank, impending fuel filter bypass, excessive fuel
quantity difference between main tanks.
b) Fuel quantity low in any main tank, center tank fuel pumps off with more than 726 kg.
of fuel in the center tank, excessive fuel quantity difference between main tanks.
c) Fuel quantity low in the main tank, impending fuel filter bypass, excessive fuel flow
difference between engines.
d) Any fuel pump producing low or no pressure with the pump switched ON, impending
fuel filter bypass, excessive fuel quantity difference between main tanks.

Answer 11

b) Fuel quantity low in any main tank, center tank fuel pumps off with more than 726 kg.
of fuel in the center tank, excessive fuel quantity difference between main tanks.

Question 12

With 2500 kg in #1 main tank and 3060kg in main tank #2; indications are:
a) A LOW indication below main tank #1 accompanied by a Master Caution light and
system annunciation for fuel.
b) An IMBAL indication below main tank #1 accompanied by a Master Caution light and
system annunciation for fuel.
c) An IMBAL indication below main tank #1 with no Master Caution light and no system
annunciation for fuel.
d) The fuel quantity arc and digits an main tank #2 turn amber.

Answer 12

c) An IMBAL indication below main tank #1 with no Master Caution light and no system
annunciation for fuel.

Question 13

.In flight, two fuel pump LOW PRESSURE lights for the #1 tank illuminate. What
happens to the #1 engine?
a) It receives fuel from #2 tank automatically.
b) I will shut down to fuel starvation.
c) It receives fuel from the #1 tank through the fuel pump bypass valve.
d) It continues to operate using fuel through the center tank bypass valve.

Answer 13

c) It receives fuel from the #1 tank through the fuel pump bypass valve.

Question 14

.In which fuel tanks are bypass valves located?

a) Center tank.
b) Both main tanks
c) All tanks.
d) None.

Answer 14

b) Both main tanks

Question 15

What is indicated by illumination of the LOW PRESSURE light?

a) Low fuel pressure in the affected tank.
b) Low pressure in the fuel manifold.
c) The fuel pump is switched OFF.
d) Both A and B are correct.

Answer 15

b) Low pressure in the fuel manifold.

Question 16

When the crossfeed selector is set to OPEN and the valve is not open; the VALVE
OPEN light is:
a) Illuminated dim blue.
b) Illuminated bright blue.
c) Illuminated amber.
d) Extinguished.

Answer 16

b) Illuminated bright blue.

Question 17

Which source powers the engine fuel shutoff valves?

a) The hot battery bus.
b) The battery bus.
c) The DC standby bus.
d) The AC standby bus.

Answer 17

a) The hot battery bus