Fuel Flashcards

1
Q

<p>Fuel can be suction feed through Main tanks </p>

A

<p>2 &amp; 3 (FCOM 12.20.2)</p>

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2
Q

Fuel temperature is measured in each respective tank. True or False

A

False -Fuel temperature is measured in main tank 1 and displays on primary EICAS (FCOM 12.20.1)

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3
Q

Each reserve tank contains two transfer valves when open, gravity feed to

A

main tank 2 or 3 (FCOM 12.20.9)

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4
Q

Apu fuel comes from

A

APU fuel is normally supplied from AFT main tank 2

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5
Q

Fuel can be jettison from____.

A

all fuel tanks (FCOM 12.20.11)

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6
Q

When does jettison begin, after arming the Jettison logic?

A

Fuel Jettison NOZZLE Valve Switches ON (FCOM 12.20.10)

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7
Q

If the flow bar is not in view and the valve light is extinguished on a fuel crossfeed valve switch, what is the position of the crossfeed valve?

A

The switch is off, and the valve close.

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8
Q

What is the indication if the CWT pump switches are OFF and there is no fuel in the tank?

A

Nothing ()

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9
Q

What does the EICAS caution message FUEL QTY LOW mean?

A

Fuel quantity 900 kgs or less in one or (FCOM 12.30.2)

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10
Q

What is the indication if a main tank fuel pump fails?

A

EICAS Message+ LOW pressure light (CBT– FUEL- FAILURES )

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11
Q

When will the FMC message “FUEL DISAGREE - PROG 2/2” be displayed?

A

If the FMC calculates a large (4,080kg) difference between the total sensed fuel quantity and calculated (11.32.4)

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12
Q

Crossfeed valves 2 and 3 automatically close during?

A

The FSMCs close crossfeed valves 2 and 3 when flaps extend to takeoff position (FCOM 12.20.11)

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13
Q

Which tanks are equipped with override jettison pumps?

A

Main tanks 2,3,center wing tank (FCOM 12.10.1)

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14
Q

Which pump has to be switched on when the APU is started?

A

None- all automatically (CBT- FUEL- Normal operation)

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15
Q

What does the ambler VALVE light in a fuel X-FEED switch tell you?

A

disagreement- crossfeed valve not in system logic commanded position (FCOM 12.10.1)

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16
Q

When does the > FUEL TEMP LOW message appear?

A

Fuel temperature -37°C or less (FCOM 12.30.4)

17
Q

What happens in the fuel system when takeoff flaps are extended?

A

The FSMCs close crossfeed valves 2 and 3 when flaps extend to takeoff (FCOM 12.20.11) the flow bars remain in view

18
Q

How is fuel transferred out of reserve tanks 1 & 4?

A

Gravity (FCOM 12.20.9)

19
Q

When will the FUEL/TANK EICAS message appear?

A

With crossfeed valve 1 or 4 open: on the ground after fueling, after initial electrical power stablished, or after CMC ground test; main tank 2 quantity less than or equal to main tank 1 quantity plus 500 kgs and main tank 3 quantity less than or equal to main tank 4 quantity plus 500 kgs, or in flight, main tank 2 quantity equal to or less than main tank 1 quantity, or main tank 3 quantity equal to or less than main tank 4 quantity. Message inhibited during jettison. Message inhibited on the ground withtakeoff poweron the ground after fueling, after initialelectrical power established, or afterCMC ground test; main tank 2 quantityless than or equal to main tank 1quantity plus 500 kgs and main tank 3quantity less than or equal to main tank4 quantity plus 500 kgs, orin flight, main tank 2 quantity equal toor less than main tank 1 quantity, ormain tank 3 quantity equal to or lessthan main tank 4 quantity.Message inhibited during jettison.Message inhibited on the ground withtakeoff power (FCOM 12.30.4)