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Embraer 190 Technical > Fuel > Flashcards

Fuel Flashcards

1
Q

How many Fuel tanks are there?

A

2 Integral Wing Tanks, each with a Collector & Surge Tank

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2
Q

In total, how many Fuel Pumps are there?

A

2 x Ejector Fuel Pumps
2 x AC Electric Fuel Pumps
6 x Scavenge (Ejector) Pumps
1 x DC Electric Fuel Pump (RIGHT Tank Only)

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3
Q

In the RIGHT wing, how many fuel pumps are there and what are they?

A

1 x Ejector Fuel Pump
1 x AC Electric Fuel Pump
3 x Scavenge (Ejector) Pump
1 x DC Electric Fuel Pump

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4
Q

What is the purpose of the Ejector Fuel Pump and how does it work?

A

Primary Fuel Pump
- Venturi Pump with no moving parts, powered by respective engine motive flow.
- Self sustained pump and does not require electrical power
- Does not work when the engines are not running

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5
Q

What Fuel Pump is used during Engine Start?

A

AC Fuel Pump

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6
Q

What is the purpose of the AC Fuel Pump?

A

Backup for the Ejector Pump in case of failure

AND

Supplies fuel to:
ONSIDE engine during Engine Start
CROSS-side engine during crossed operations
APU (When the engine is not running)

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7
Q

What supplies the Left AC Fuel Pump (AC Pump 1)?

A

AC BUS 1

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8
Q

What Supplies the Right AC Fuel Pump (AC Pump 2)?

A

AC ESS BUS

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9
Q

What is the purpose of the scavenge pumps?

A

Maintains the fuel level in the collector tank
AND
Ensures constant fuel flow to the engines

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10
Q

What is the purpose of the DC Fuel Pump?

A

Provides pressurised fuel for normal APU operation
AND
Fuel for engine start when AC power/AC Fuel Pump is not available

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11
Q

What is the electrical power supply for the DC Fuel Pump?

A

DC ESS BUS 2

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12
Q

Where is the Fuel Temperature sensed?

A

LEFT Fuel Tank

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13
Q

What is the maximum Fuel Imbalance?

A

360kg

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14
Q

When will the EICAS Message FUEL EQUAL-XFEED OPEN EICAS Message display?

A

When the Fuel Imbalance reduces to 45kg and the Crossfeed Valve is OPEN

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15
Q

What is the purpose of the Engine Fuel Shutoff Valve?

A

Prevents hazardous quantities of fuel from flowing into the engines/fire zones

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16
Q

What is the Normal position of the Engine Fuel Shutoff Valve?

A

OPEN

17
Q

In what circumstances are the Engine Fuel Shutoff Valves CLOSED?

A

Actuation of the Fire Handles ONLY

18
Q

Where is the Refuelling & Refuelling Control Panel & associated Pressurised Refuelling point Located?

A

Under the Right Wing

19
Q

When is the Total Fuel Used Reset?

A

Automatically on first engine start

20
Q

What is the purpose of the Fuel Crossfeed Valve?

A

Permits fuel supply to both engines for the purpose of correcting and avoiding fuel imbalance

21
Q

When Selecting the Crossfeed Valve to LOW 1, what happens in the system?

A

Crossfeed Valve Opens
Activates AC PUMP 2
Both Engines are supplied fuel from Tank 2

22
Q

When attempting Crossfeed, what happens if AC Pumps 1 & 2 are not in AUTO?

A

Fuel Crossfeed command is overridden

23
Q

How is Fuel Transfer achieved?

A

The amount of fuel supplied to the LOW engine is higher than the fuel burn required, permitting transfer from 1 tank to another

24
Q

When will the FUEL 1(2) LO LEVEL EICAS Message display?

A

400kg - When the fuel is below the Sensor Level

25
Q

What happens if a scavenge pump stops transferring fuel to the collector box?

A

The fuel in the collector box flows out so that the fuel level inside it reaches the same level as the tank

26
Q

Where is the collector tank in the wing?

A

Inboard

27
Q

What is the purpose of the surge tank?

A

Collects any fuel that may have entered the vent system during manoeuvres

28
Q

What is the purpose of the collector tank?

A

Keeps fuel pumps submerged, ensuring a constant fuel flow to the respective engines

29
Q

How is Fuel Quantity Measured?

A

Electric Sensors
+ 1 Independent Fuel Low Level Sensor in each tank collector box

30
Q

During an electrical emergency and the RAT in use, which fuel pump will be powered?

A

Right Wing AC Pump 2

31
Q

How many External Magnetic Level Indicators (Dripsticks) are there?

A

6 (3 per wing)

32
Q

What is the purpose of the Drain Valve?

A

Collects Water via gravity in each tank

33
Q

What is the purpose of the vent system?

A

Ensures the differential pressure between the tank and the surrounding environment remains within limits

34
Q

How is the fuel tank protected from over pressurisation?

A

High Capacity Pressure Relief Valve

35
Q

What does a GREEN circle with a GREEN line diagonal to the flow line mean on the MFD Fuel Synoptic Page?

A

Fuel System Valve in Transit, with POSITIVE fuel pressure (would be WHITE if NO Fuel pressure)

36
Q

Under what Engine N2 might it be normal to see no fuel flow in the fuel lines on the MFD Fuel Synoptic Page?

A

60%

Embraer 190 Technical (20 decks)

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