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Republic Airways > Fuel > Flashcards

Fuel Flashcards

1
Q

We have a DC fuel pump to provide pressurized fuel for regular APU operation, and engine start when AC power or the AC fuel pump is not available (T/F).

A

True

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2
Q

How is the aircraft refueled?

A

2 overwing manual refueling ports and one pressurized refueling point on the right wing

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3
Q

The engine fuel shutoff valves can be closed via selector knobs on the FUEL panel (T/F).

A

False

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4
Q

Engine motive flow powers:

A

Ejector pumps

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5
Q

The fuel crossfeed valve automatically opens when a fuel imbalance of 800 pounds occurs

A

False

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6
Q

Will setting the AC PUMP 1 (2) selector knobs to any position other than AUTO override the fuel crossfeed commands?

A

Yes

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7
Q

The collector tank keeps the fuel pumps submerged, ensuring constant fuel flow to the respective engine (T/F).

A

True

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8
Q

How many fuel tanks does the aircraft have?

A

2 integral fuel tanks

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9
Q

How is each integral fuel tank set up?

A

Collector tank in the inboard section and a surge tank located at the outboard section

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10
Q

Where would the fuel system indications and parameters be displayed?

A

MFD fuel synoptic page and EICAS

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11
Q

What would be the EICAS indication of a max fuel imbalance?

A

EICAS FUEL IMBALANCE caution is displayed when the imbalance reaches 800 pounds until the imbalance reaches 100 pounds

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12
Q

What fuel level causes the FUEL IMBALANCE message to appear and when does it go away?

A

800; 100

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13
Q

Can the aircraft be over wing refueled?

A

Yes, by two gravity refueling ports, one on each wing

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14
Q

Where is the refueling door located?

A

Right wing

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15
Q

Can you refuel the aircraft while the power is off (no APU/GPU)?

A

Yes

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16
Q

What powers the refuel panel when APU and GPU are off?

A

HOT BATT BUS 2

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17
Q

Where is the fuel tank temperature taken?

A

Left tank

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18
Q

What fuel pumps are in each wing?

A

1 primary ejector pump, 1 AC electric pump, 1 DC Electric Pump (right tank), 3 scavenge pumps

19
Q

What is the primary ejector pump?

A

Venturi pump with no moving parts and no electrical power

20
Q

How is the primary ejector pump powered?

A

Motive flow from the respective engine driven fuel pump

21
Q

With all engines running, through which pumps are the APU and engines fed?

A

Primary ejector pumps

22
Q

What is the purpose of the AC Fuel Pump?

A

Back up pump supplying fuel to the engine in the event of an ejector pump failure or during engine start
Supply fuel to the APU when the engine isn’t running
Crossfeed operations

23
Q

When will the AC pump turn on automatically if the AC pump selector knob is set to AUTO?

A

Crossfeed operations
Ejector pump failure
Engine start
APU operation if the #2 ejector pump is not operating

24
Q

Which fuel tank is the APU’s normal source?

A

Right tank

25
Q

How many ways are there to close the fuel SOV?

A

One, pulling the associated fire handle

26
Q

What closes the engine shutoff valve?

A

Pulling the associated fire handle

27
Q

Regarding fuel, what happens when the respective fire handle is pulled?

A

Fuel shutoff valve closes

28
Q

Where is the DC fuel pump located?

A

Right wing tank

29
Q

When can the DC fuel pump be used?

A

In flight or on the ground

30
Q

Why do we have a DC pump?

A

To provide pressurized fuel for normal APU operation and engine start when AC power or the AC fuel pump is not available

31
Q

What is the purpose of scavenge pumps?

A

Maintains fuel level in the collector tank

32
Q

Which pump takes priority once an engine is started, if all pumps are available?

A

Associated primary ejector pump

33
Q

What is the fuel pump system logic for fuel feed to the engine during normal operations?

A

Primary ejector pump, AC pump, DC pump

34
Q

What is the purpose of the collector tank?

A

Keeps the fuel pumps submerged and ensures constant fuel flow to the primary ejector pump, AC fuel pump, and DC fuel pump

35
Q

Can fuel be transferred tank to tank or dumped overboard?

A

No

36
Q

How would you correct a fuel imbalance?

A

Position crossfeed selector knob to the low side with LOW (1)(2) as required

37
Q

How does crossfeed work?

A

Opens the crossfeed valve and automatically turns on the opposite AC fuel pump

38
Q

Will setting the AC PUMP (1) (2) selector knob to any position other than auto override the fuel crossfeed commands?

A

Yes

39
Q

What are the alternate means of measuring fuel on the ground?

A

3 magnetic level indicators under each wing

40
Q

What is the maximum fuel imbalance between tanks?

A

790 lbs

41
Q

When must the XFEED selector be set to OFF?

A

Takeoff and landing

42
Q

What is the minimum fuel temperature?

A

-37°C

43
Q

How is fuel supplied in the event of dual engine failure with the RAT deployed?

A

Fuel supplied from the right wing using the AC ESS BUS

44
Q

What bus supplies electrical power to the DC motor pump?

A

DC ESS 2

Republic Airways (18 decks)

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