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E175 > Fuel > Flashcards

Fuel Flashcards

1
Q

How many fuel tanks are there?

A

There are 2 fuel tanks, one in each wing.

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2
Q

What is the function of the collector box in each wing?

A

The collector box keeps fuel pumps submerged to ensure constant fuel flow to the respective engine.

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3
Q

What does the vent system do?

A

The vent system ensures pressure between the tank and ambient remains within structural limits.

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4
Q

What is the total fuel quantity?

A

The total fuel quantity is 20,935 lb.

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5
Q

At what weight does the Fuel Low Level warning occur?

A

The Fuel Low Level warning occurs at 660 lb in the respective tank.

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6
Q

What is the minimum fuel temperature taken from the left wing?

A

The minimum fuel temperature is -37°C.

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7
Q

How many engine-driven fuel pumps are there?

A

There are 2 engine-driven pumps.

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8
Q

What types of ejector pumps are present?

A

There are 2 primary (main) ejector pumps and 6 scavenge ejector pumps.

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9
Q

What type of electric pumps are included?

A

There are 2 AC electric pumps and 1 DC electric pump.

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10
Q

What is the primary function of engine-driven pumps?

A

Engine-driven pumps are the primary fuel source to the engine.

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11
Q

What do ejector pumps maintain?

A

Ejector pumps maintain head pressure in the fuel line going to the respective engine.

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12
Q

What is the function of scavenge pumps?

A

Scavenge pumps maintain adequate fuel level in the collector tank.

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13
Q

What is the purpose of AC fuel pumps?

A

AC fuel pumps are back-up for the ejector pumps, used for engine starts, and during crossfeed operations.

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14
Q

What does AC Pump 2 provide fuel for?

A

AC Pump 2 provides fuel to the APU when engine-driven pump 2 is not running.

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15
Q

Where is the DC fuel pump installed?

A

The DC fuel pump is installed only in the right wing.

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16
Q

What does the DC fuel pump provide?

A

The DC fuel pump provides pressurized fuel for normal APU start when AC power or AC fuel pump 2 is not available.

17
Q

What is fuel crossfeed?

A

Allows fuel to both engines from one tank and is used to correct fuel imbalance.

18
Q

What is the maximum fuel imbalance?

A

794 lb. (CAS message appears at about 800 lb.)

19
Q

At How many pounds does the CAS message for imbalanced fuel go away?

A

When fuel is within 100 lb. balanced.

20
Q

What happens when LOW 1 is indicated?

A

The right wing tank electric pump turns ON and the X-FEED valve opens.

21
Q

What happens when LOW 2 is indicated?

A

The left wing tank electric pump turns ON and the X-FEED valve opens.

22
Q

How are engine fuel shutoff valves operated?

A

Only the respective fire handles in the cockpit will close the respective shutoff valves.

23
Q

What are the refueling options?

A

Single-point or over wing.

24
Q

Which battery powers the refueling and defueling system?

A

Powered by BATT 2 or DC buses.

25
Q

How many fuel tanks does the airplane have?

A

2 integral tanks.

26
Q

Where is fuel tank temperature taken?

A

Left tank.

27
Q

What types of fuel pumps are in each wing?

A

Primary ejector pump, ACMP, DCMP (right tank), and 3 scavenge ejector pumps.

28
Q

How does the Primary ejector pump work?

A

Venturi pump with no moving parts and no electrical power used by the respective engine.

Powered by motive flow.

29
Q

What is the purpose of the ACMP?

A

Back-up pump in case of primary ejector pump failure, engine start, and crossfeed operations.

30
Q

What is the purpose of the DCMP?

A

Used for APU or engine start if AC power or the ACMP is not available.

31
Q

What is the purpose of the scavenge pumps?

A

Maintains fuel level in the collector box.

32
Q

What pump(s) is used once an engine is started?

A

Primary (main) ejector pump.

33
Q

What is the 2 purposes of the collector box?

A

Keeps the fuel pumps submerged

Ensures constant fuel flow to the respective engine

34
Q

What is the 2 uses surge/vent tank?

A

Collects fuel during wing-down maneuvers and returns it to the main tanks once the wings are level

Equalizes tank pressure with atmosphere in flight and during refueling

35
Q

Can fuel be transferred from tank-to-tank or be dumped overboard?

A

No

36
Q

What happens when the crossfeed switch is selected to LOW 1?

A

Crossfeed valve is opened

Commands the ACMP 2 to ON to provide fuel from the right tank to both engines

37
Q

What is the only way to close the engine fuel SOV?

A

Pull the associated engine fire extinguishing handle

38
Q

When will the FUEL 1(2) LO LEVEL EICAS be presented?

A

660 lb. of fuel remaining in the associated tank

39
Q

Fuel Low Level caution (gauge indications turn yellow only) occurs with how many pounds of fuel in the tank

A

1320 lbs

E175 (8 decks)

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