Boeing B737 MAX - Fuel

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. The center tank scavenge jet pump operates when:

Please select 2 correct answers

Main tank No. 1 quantity is about one-half.

Both Center Tank Fuel Pump switches are turned off.

The Center fuel tank is about 3/4 full.

Either engine is operating.

Correct! Wrong!

A Fuel Measuring Stick Allows comparison of fuel quantity or weight as determined from measuring stick reading and fuel weight indicated by fuel quantity indicators:

Four fuel measuring sticks are installed in each main tank and three are installed in center tank

Six fuel measuring sticks are installed in each main tank and four are installed in center tank

Five fuel measuring sticks are installed in each main tank and four are installed in center tank

Eight fuel measuring sticks are installed in each main tank and four are installed in center tank

Correct! Wrong!

Intentional dry running of a center tank fuel pump (low pressure light illuminated) is prohibited.

True.

False.

Correct! Wrong!

When AC fuel pumps are operating, fuel for the APU is supplied from the left side of the fuel manifold. If the AC fuel pumps are not operating, fuel is suction fed from main tank No. 2.

True.

False.

Correct! Wrong!

If the AC fuel pumps are not operating, fuel is suction fed from main tank No. 1.

For landing, what is the maximum fuel imbalance between No.1 and No.2 main tanks?

453 kg (1000 lbs)

590 kg (1300 lbs)

500 kg (1100 lbs)

There is no maximum fuel imbalance.

Correct! Wrong!

Random fuel imbalance must not exceed 453 kgs / 1000 lbs for taxi, takeoff, flight or landing.

During flight, two fuel pumps LOW PRESSURE lights of the No.1 tank illuminate. What happens to the No.1 engine?

It receives fuel from the No.2 tank automatically

It receives fuel from the No.1 tank through the fuel pump bypass valve

It continues to operate using fuel though the center tank bypass valve.

It will shut down due to fuel starvation

Correct! Wrong!

With failure of all generators, the center tank fuel:

Cannot be used.

Can be used by switching off all wing tank pumps and opening the crossfeed valve.

Will be fed to the tanks by the center tank scavenge jet pump.

Correct! Wrong!

The engine fuel manifolds are interconnected by use of the crossfeed valve. The valve is _ motor operated from the _.

DC & DC Standby Bus.

AC & Transfer Bus No.2

DC & Battery bus

AC & Transfer Bus No.1

Correct! Wrong!

The fuel quantity indicators are powered by:

Standby AC power.

Standby DC power.

TR2.

Battery bus.

Correct! Wrong!

A shut-off system is used during refuelling to:

Prevent refuelling pressures in excess of 50 psi.

Automatically close the manual defuelling valave when the wing tanks are full.

Automatically close the fueling valve in each fuel tank when the tank is full.

Are only available for Left & Right main tanks (not on the Center one).

Correct! Wrong!

Maximum tank fuel temperature is _____

+ 55 deg.C.

+ 45 deg.C.

+ 49 deg.C.

+ 42 deg.C.

Correct! Wrong!

The center tank scavenge jet pump transfers remaining fuel from the center tank at a rate of approximately ____.

80 kg/hr (177 lbs/hr) depending upon speed.

80 kg/hr (177 lbs/hr) depending upon altitude.

80 kg/hr (177 lbs/hr) depending upon weight.

80 kg/hr (177 lbs/hr) depending upon temperature.

Correct! Wrong!

The Engine Fuel Shut Off valves:

Are cable operated to CLOSE or OPEN.

Are Hot Battery Bus powered and may be closed by the engine start lever or the respective engine fire switch.

Are cable operated to CLOSE.

Are AC operated to OPEN and mechanically closed by the engine start lever or fire switch.

Correct! Wrong!

What does an illuminated main tank fuel pump LOW PRESSURE light indicate?

Please select 2 correct answers

Fuel pump output pressure is low, or FUEL PUMP switch is OFF.

Low fuel pump output pressure

Low fuel pressure in the affected tank

Correct! Wrong!

The FUEL TEMP indicator located on the fuel control panel displays fuel temperature. Two sensors in (in each main tank) allow monitoring of fuel temperature.

True.

False

Correct! Wrong!

There is only one sensor in main tank No. 1. It allows monitoring of fuel temperature.

The Engine Fuel Shutoff valve:

And the spar fuel shutoff valve require AC power to operate.

Is the only fuel shutoff with an associated blue light on the forward overhead fuel panel.

Is controlled by both the Engine Fire Warning switch and the Engine Start lever; however, the spar fuel shutoff valve is controlled only by the Engine Start lever.

And the spar fuel shutoff valves close whenever their respective Engine Fire Warning switch is pulled or Engine Start lever is placed to CUTOFF.

Correct! Wrong!

Fuel pump LOW PRESSURE lights may flicker when tank quantity is low and the airplane is in a climb, descent, or on the ground with a nose-down attitude.

True.

False.

Correct! Wrong!

What is the source of electrical power for the engine fuel shutoff valves?

The Hot Battery Bus.

The Battery Bus.

The AC Standby Bus.

The DC Standby Bus.

Correct! Wrong!

Minimum tank fuel temperature prior to takeoff and inflight is - 43 deg.C, or 3 deg.C above the fuel freezing point temperature, whichever is higher.

True.

False.

Correct! Wrong!

The use of Fuel System Icing Inhibitor additives does not change the minimum fuel tank temperature limit.

Fuel Temperature - The temperature indicating system uses _____ electrical power.

DC (on ground) and AC (in flight)

AC (on ground) and DC (in flight)

Correct! Wrong!

Rapid fueling and defueling is accomplished at the single-point pressure fueling station in the right wing. The fueling station is also used for the ground transfer of fuel between tanks.

False.

True.

Correct! Wrong!

To defuel No. 1 tank:

Select the No. 1 Main tank fuel pumps ON, the Crossfeed valve CLOSED and the Manual Defueling valve OPEN

Select the No. 1 Main tank fuel pumps ON, the Crossfeed valve OPEN and the Manual Defueling valve OPEN

Select the No. 1 and No. 2 Main tank fuel pumps ON, the Crossfeed valve OPEN and the Manual Defueling valve OPEN

Correct! Wrong!

Center fuel tank fuel is used before main tank fuel because:

Center tank check valves open at a higher differential pressure than main tank check valves.

Main tank pumps cannot produce pressure until the center tank LOW PRESSURE lights illuminate and center tank pumps are turned OFF

Center tank check valves open at a lower differential pressure than main tank check valves.

Center tank fuel pumps produce higher pressure than main tank pumps.

Correct! Wrong!

What is the condition of the VALVE OPEN light when the crossfeed selector is positioned OPEN and the crossfeed valve is closed?

Illuminated bright blue.

Extinguished.

Illuminated dim blue.

Illuminated amber.

Correct! Wrong!

There are CDS fuel alert for:

Fuel quantity low in center or main tank, either center tank fuel pump producing low or no pressure with fuel in center tank, excessive fuel flow difference between engines.

Any fuel pump producing low or no pressure with the pump switch ON, impending fuel filter bypass, excessive fuel quantity difference between main tanks.

Fuel quantity low in the main tank, impending fuel filter bypass, excessive fuel flow difference between engines.

Fuel quantity low in the main tank, both center tank fuel pumps producing low or no pressure with fuel in the center tank, excessive fuel quantity difference between main tanks.

Correct! Wrong!

Main tanks 1 and 2 must be full if center tank contains more than 500 kgs / 1100 lbs.

True.

False.

Correct! Wrong!

Main tanks 1 and 2 must be full if center tank contains more than 453 kgs / 1000 lbs.

Each fuel tank uses two AC powered fuel pumps which are cooled and lubricated by fuel passing through the pump.

True.

False.

Correct! Wrong!

Boeing 737 MAX - Fuel

Quiz

Boeing B737 MAX - Fuel

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. The center tank scavenge jet pump operates when:

A Fuel Measuring Stick Allows comparison of fuel quantity or weight as determined from measuring stick reading and fuel weight indicated by fuel quantity indicators:

Intentional dry running of a center tank fuel pump (low pressure light illuminated) is prohibited.

When AC fuel pumps are operating, fuel for the APU is supplied from the left side of the fuel manifold. If the AC fuel pumps are not operating, fuel is suction fed from main tank No. 2.

For landing, what is the maximum fuel imbalance between No.1 and No.2 main tanks?

During flight, two fuel pumps LOW PRESSURE lights of the No.1 tank illuminate. What happens to the No.1 engine?

With failure of all generators, the center tank fuel:

The engine fuel manifolds are interconnected by use of the crossfeed valve. The valve is ___ motor operated from the ___.

The fuel quantity indicators are powered by:

A shut-off system is used during refuelling to:

Maximum tank fuel temperature is _____

The center tank scavenge jet pump transfers remaining fuel from the center tank at a rate of approximately ____.

The Engine Fuel Shut Off valves:

What does an illuminated main tank fuel pump LOW PRESSURE light indicate?

The FUEL TEMP indicator located on the fuel control panel displays fuel temperature. Two sensors in (in each main tank) allow monitoring of fuel temperature.

The Engine Fuel Shutoff valve:

Fuel pump LOW PRESSURE lights may flicker when tank quantity is low and the airplane is in a climb, descent, or on the ground with a nose-down attitude.

What is the source of electrical power for the engine fuel shutoff valves?

Minimum tank fuel temperature prior to takeoff and inflight is - 43 deg.C, or 3 deg.C above the fuel freezing point temperature, whichever is higher.

Fuel Temperature - The temperature indicating system uses _____ electrical power.

Rapid fueling and defueling is accomplished at the single-point pressure fueling station in the right wing. The fueling station is also used for the ground transfer of fuel between tanks.

To defuel No. 1 tank:

Center fuel tank fuel is used before main tank fuel because:

What is the condition of the VALVE OPEN light when the crossfeed selector is positioned OPEN and the crossfeed valve is closed?

There are CDS fuel alert for:

Main tanks 1 and 2 must be full if center tank contains more than 500 kgs / 1100 lbs.

Each fuel tank uses two AC powered fuel pumps which are cooled and lubricated by fuel passing through the pump.

The engine fuel manifolds are interconnected by use of the crossfeed valve. The valve is _ motor operated from the _.