Study Guide: Fuel Flashcards

1
Q

757: To reduce electrical loads, the center tank pumps are normally inhibited in flight or on the ground when:

A

The associated N3 is less than 50% RPM

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2
Q

757/767: According to the graphic, if the APU was not running, would these indications be normal?

A

No, the L FWD fuel pump PRESS light should be illuminated

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3
Q

757/767: Fuel is normally supplied to the APU from the left main fuel tank. While the APU is running, fuel is pumped by the:

A

Left forward fuel pump

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4
Q

757/767: Fuel is contained in a center tank and left and right main tanks. Additionally,
located in each wing tip are surge tanks. Fuel from each surge tank is drained into:

A

The associated main tank

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5
Q

757/767: A fuel crossfeed VALVE light illuminates and the EICAS advisory message FWD FUEL X-FEED or AFT FUEL X-FEED displays if:

A

The fuel crossfeed valve is not in the commanded position

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6
Q

757/767: When center tank fuel is depleted, this will be indicated by:

A

EICAS advisory messages CTR L FUEL PUMP and CTR R FUEL PUMP

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7
Q

757/767: According to the graphic, all six fuel pumps are operating, therefore the _________ provide fuel to the engines.

A

Center tank

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8
Q

757: The fuel temperature (TEMP) indication displays the temperature of fuel in the:

A

Right main tank

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9
Q

767: The fuel jettison system allows jettison from the _________.

A

Center tank

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10
Q

767: Two dual pump units provide a high capacity jettison rate of approximately _____
pounds per minute.

A

2600

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11
Q

763: Positioning the FUEL JETTISON selector to ON automatically ________________
in order to reduce electrical demand.

A

Inhibits L-3 and R-3 window heat and configures equipment cooling to the override mode

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12
Q

767: The fuel temperature (TEMP) indication displays the temperature of fuel in the:

A

Left main tank

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13
Q

767: When fuel quantity in the left and right main tanks differ by 2000 pounds (plus or minus 500 pounds) the ________ light illuminates and the corresponding EICAS
advisory message is displayed.

A

FUEL CONFIG

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14
Q

757: When fuel quantity in the left and right main tanks differ by ______ pounds the FUEL CONFIG light illuminates and the corresponding EICAS advisory message is displayed.

A

1800

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15
Q

757/767: According to the graphic, the fuel configuration FUEL CONFIG light is illuminated. Which statement provides a possible cause for it’s illumination?

A

The center tank contains more than 1200 pounds and the center fuel pump switches are OFF

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16
Q

757/767: Crossfeed valves isolate the left fuel manifold from the right. These valves are
normally closed, providing fuel feed from tank to engine. The valve(s) are opened:

A

Any time it becomes necessary to feed an engine from an opposite fuel tank

17
Q

757/767: When fuel quantity in the left and right main tanks differ by _____________ the FUEL CONFIG light illuminates and the corresponding EICAS advisory message is
displayed.

A

1800 lbs (757) and 2000+/-500 lbs (767)

18
Q

757/767: Which statement provides a situation that would cause the FUEL CONFIG light
to illuminate?

A

The total usable fuel in the left or right main tank drops below approximately 2200 pounds

19
Q

757/767: The nitrogen generation system (NGS) converts bleed air to nitrogen-enriched air (NEA) during all phases of flight. The NEA is delivered to:

A

The center fuel tank to reduce flammability of the tank

20
Q

757: With the center tank pumps off, remaining center tank fuel is automatically scavenged by a fuel scavenge ejector pump. A valve allows fuel to be discharged into
the __________ when that tank is less than 50% full.

A

Left main tank

21
Q

767: With _______________, scavenge of remaining center tank fuel begins when the
main tanks are approximately half full.

A

Center tank pumps off

22
Q

767: To reduce electrical loads, the center tank pumps are normally inhibited in flight or on the ground when:

A

The associated N2 is less than 50% RPM