756 Systems Fuel

A highly detailed, technical illustration of a 757 and 767 fuel system layout, including fuel tanks and pump configurations, in a clean, educational style.

757/767 Fuel Systems Mastery Quiz

Test your knowledge of the 757 and 767 fuel systems with this comprehensive quiz! Designed for aviation enthusiasts, pilots, and maintenance personnel, this quiz covers essential fuel management concepts and operational protocols.

Challenge yourself with questions related to:

Fuel tank configurations
APU fuel supply
Fuel jettison systems
Crossfeed operations

23 Questions6 MinutesCreated by FlyingCloud375

1) 757: To reduce electrical loads, the center tank pumps are normally inhibited in flight or on the ground when:

A) Both crossfeed valves are open

B) The associated N2 is less than 50% RPM

C) The associated N3 is less than 50% RPM

D) The fueling bay door is open

2) 757/767: According to the graphic, if the APU was not running, would these indications be normal?

A) No, the PRESS lights are armed only when the switch is ON

B) No, PRESS lights indicate three pumps have failed

C) No, the L FWD fuel pump PRESS light should be illuminated

D) No, the center pumps should have PRESS lights illuminated

3) 757/767: Fuel is normally supplied to the APU from the left main fuel tank. While the APU is running, fuel is pumped by the:

A) DC powered fuel pump

B) Left aft fuel pump

C) No. 1 center fuel pump

D) Left forward fuel pump

4) 757/767: Fuel is contained in a center tank and left and right main tanks. Additionally, located in each wing tip are surge tanks. Fuel from each surge tank is drained into:

A) The left main tank only

B) The associated main tank

C) The center tank

D) The right main tank only

5) 757/767: A fuel crossfeed VALVE light illuminates and the EICAS advisory message FWD FUEL X-FEED or AFT FUEL X-FEED displays if:

A) The crossfeed valve is closed

B) The fuel crossfeed valve is not in the commanded position

C) The crossfeed system is operating normally

D) The crossfeed valve is open

6) 757/767: When center tank fuel is depleted, this will be indicated by

A) EICAS caution messages L LOW CTR FUEL and R LOW CTR FUEL

B) EICAS advisory messages CTR L FUEL PUMP and CTR R FUEL PUMP

C) EICAS warning message LOW FUEL

D) There is no indication of center tank fuel depletion

7) 757/767: According to the graphic, all six fuel pumps are operating, therefore the _________ provide fuel to the engines.

A) Center tank

B) Right tank

C) Left tank

D) Left or right tank

8) 757: The fuel temperature (TEMP) indication displays the temperature of fuel in the:

A) Right main tank

B) Center tank

C) Left main tank

D) Left and right main tank, averaged

9) 767: The fuel jettison system allows jettison from the _________.

A) Right main tank

B) Left main tank

C) Center tank

D) Left main, right main, or center tank

10) 767: Two dual pump units provide a high capacity jettison rate of approximately _____ pounds per minute.

A) 2200

B) 1800

C) 2600

D) 1500

11) 763: Positioning the FUEL JETTISON selector to ON automatically ________________ in order to reduce electrical demand.

A) Inhibits all window heat and configures equipment cooling to the override mode

B) Inhibits L-3 and R-3 window heat and configures equipment cooling to the standby mode

C) Inhibits all window heat and configures equipment cooling to the standby mode

D) Inhibits L-3 and R-3 window heat and configures equipment cooling to the override mode

12) 767: The fuel temperature (TEMP) indication displays the temperature of fuel in the:

A) Left main tank

B) Right main tank

C) Center tank

D) Left and right main tank, averaged

13) 767: When fuel quantity in the left and right main tanks differ by 2000 pounds (plus or minus 500 pounds) the ________ light illuminates and the corresponding EICAS advisory message is displayed.

A) FUEL DISAGREE

B) LOW FUEL

C) FUEL BALANCE

D) FUEL CONFIG

14) 757: When fuel quantity in the left and right main tanks differ by ______ pounds the FUEL CONFIG light illuminates and the corresponding EICAS advisory message is displayed.

A) 1600

B) 1500

C) 1800

D) 1200

15) 757/767: According to the graphic, the fuel configuration FUEL CONFIG light is illuminated. Which statement provides a possible cause for it's illumination?

A) The center tank contains more than 1800 pounds and the center fuel pump switches are OFF

B) The center tank contains more than 1200 pounds and the center fuel pump switches are ON

C) The center tank contains more than 2000 pounds (plus or minus 500) and the center fuel pump switches are OFF

D) The center tank contains more than 1200 pounds and the center fuel pump switches are OFF

16) 757/767: Crossfeed valves isolate the left fuel manifold from the right. These valves are normally closed, providing fuel feed from tank to engine. The valve(s) are opened:

A) Any time fuel quantity in the center tank is less than 1800 pounds

B) Any time it becomes necessary to transfer fuel from an opposite fuel tank

C) Any time it becomes necessary to feed an engine from an opposite fuel tank

D) Any time fuel quantity in the center tank is less than 1200 pounds

17) 757/767: When fuel quantity in the left and right main tanks differ by _____________ the FUEL CONFIG light illuminates and the corresponding EICAS advisory message is displayed.

A) Can be found on the FMC PROG page 2/2

B) 1800 lbs (757) and 2000+/-500 lbs (767)

C) 2000+/-500 lbs (757) and 1800 lbs (767)

D) 2200 pounds

18) 757/767: Which statement provides a situation that would cause the FUEL CONFIG light to illuminate?

A) The fuel quantity in the left and right main tanks differ by 1000 pounds

B) The total usable fuel in the left or right main tank drops below approximately 2200 pounds

C) The center tank contains more than 1000 pounds and the center fuel pump switches are OFF

D) The total usable fuel in the center tank drops below approximately 2200 pounds

19) 757/767: The nitrogen generation system (NGS) converts bleed air to nitrogen-enriched air (NEA) during all phases of flight. The NEA is delivered to:

A) The center fuel tank to reduce flammability of the tank

B) The left fuel tank to reduce flammability of the tank

C) The right fuel tank to reduce flammability of the tank

D) All fuel tanks to reduce flammability of the tanks

20) 757: With the center tank pumps off, remaining center tank fuel is automatically scavenged by a fuel scavenge ejector pump. A valve allows fuel to be discharged into the __________ when that tank is less than 50% full.

A) Associated main fuel tank

B) Left surge tank

C) Right main tank

D) Left main tank

21) 767: With _______________, scavenge of remaining center tank fuel begins when the main tanks are approximately half full.

A) Center tank pumps off

B) Center tank pumps on

C) A crossfeed valve open

D) N3 above 50%

22) 767: To reduce electrical loads, the center tank pumps are normally inhibited in flight or on the ground when:

A) Both crossfeed valves are open

B) The associated N3 is less than 50% RPM

C) The associated N2 is less than 50% RPM

D) The fueling bay door is open

Unlock and Upgrade

Remove all limits from your Quizzes

756 Systems Fuel

757/767 Fuel Systems Mastery Quiz

More Quizzes