Fuel

Question 1

How many fuel tanks on the 737 MAX?

Answer 1

3

Question 2

From which tank is the fuel first used and how is this ensured?

Answer 2

Centre - Higher pressure in the pumps

Question 3

How many AC fuel pumps are there?

Answer 3

6 (2 for each tank)

Question 4

Can the engine still receive fuel if both main tank pumps have low pressure? How?

Answer 4

Yes - When main tank fuel pump pressure is low, each engine can draw fuel from its corresponding main tank through a suction feed line that bypasses the pumps.

Question 5

Describe how you would crossfeed?

Answer 5

Crossfeed selector…………………………………………….Open
Fuel pump switches (low tank) ………………………………………. OFF
When quantities are balanced:
Fuel pump switches ………………………………………………….ON
Crossfeed selector …………………………………………………Close

Question 6

Why do you have to be careful when opening the crossfeed valve?

Answer 6

Verify that the VALVE OPEN light illuminates
bright, then dim. This indicates that the
crossfeed valve is operating correctly.
(Not sure if this is the correct answer)

Question 7

What is the purpose of the Center Tank Fuel Scavenge Jet Pump?

Answer 7

With the main tank fuel pump No. 1 FWD Switch ON, the center tank fuel scavenge jet pump operates automatically to transfer any remaining center tank fuel to main tank No. 1. Fuel transfer begins when main tank No. 1 quantity is
about one-half. Once the fuel scavenge process begins, it continues for the remainder of the flight.

Question 8

What causes the Spar and Engine SOV to close?

Answer 8

Both the spar fuel shutoff valve and the engine fuel shutoff valve close whenever their respective engine fire switch is pulled or engine start lever is placed to CUTOFF.

Question 9

What does a FUEL DISAGREE message mean?

Answer 9

The totalizer fuel quantity and the FMC
calculated fuel quantity disagree.

Question 10

Is FUEL FLOW a caution for high or low fuel flow?

Answer 10

High