Fuel Flashcards
What are the two ways of fueling the aircraft?
Pressure and Gravity
What happens when the fuel cross-feed is selected to LOW 1?
Fuel pumps in wing tank 1 are selected off, and the cross-feed valve opens
What happens when the fuel cross-feed is selected to LOW 2?
Fuel pumps in wing tank 2 are selected off, and the crossfeed valve opens
If engine 1 fails, which direction should be selected on the Fuel Crossfeed Knob?
Low 2
Can the fuel cross-feed knob be used to transfer fuel from one tank to the other?
No
With the APU running, which direction should the Fuel Crossfeed Knob be selected to maintain fuel balance?
Low 2
What type of fuel tanks are the wing tanks?
Wet Wing (no bladder)
Which section of each wing fuel tank contains the electric boost pumps?
Collector box
Where are fuel system indications displayed?
MFD and EICAS. The RMU can be used as a backup
How many electric boost pumps are in each wing tank?
Three
How is the collector box kept full of fuel to keep the boost pumps submerged?
An Ejector pump and flap valves
How does the fuel Ejector pump work?
It uses a venturi to move fuel, not electricity
How is pressure in the fuel tanks equalized as fuel is burned?
Each tank has a vent tank that uses float valves to replace fuel with air as it is used
What is the total fuel capacity?
EMB 135/145 without stub tanks: 9,200
EMB 135/145 with stub tanks: 11,434
Will the wing tanks hold more fuel if using pressure Refueling or Gravity refueling
Gravity
What are the power sources for the electric fuel pumps?
A pumps: On side essential bus
B pumps: Cross side essential bus
C pumps: On side DC bus
What is the indication if a fuel pump fails?
An EICAS message notifying of low fuel pressure, All three pumps in the associated tank will cycle on and off
Where is fuel tank temperature measured?
Left wing tank
What will happen if all wing fuel pumps fail?
The engines can suction feed below 25,000 feet
How can fuel quantity be measured if the quantity indicators have failed?
Use the three measuring sticks on the underside of the wing
*Aircraft without stub tanks only have two measuring sticks per wing
