Fuel System PART 1

Which subsystem ensures fuel is supplied from tanks to the engines during normal operation?

• Pressure refueling subsystem

• Fuel storage subsystem

• Engine fuel feed subsystem

• Fuel quantity indicating subsystem

In maintenance documentation, what does FQIS stand for?

• Fuel quantity indicating system

• Fuel quality inspection system

• Fuel quick-installation system

• Fuel quantity isolation System

A maintenance team encounters light frost on the upper wing surface while fuel in the main tanks is at or below 32°F (0°C). Which action aligns with CSFF procedures when any AMM conditions are not met?

• Walk the wing to visually confirm frost thickness

• Allow frost if limited to lower wing surfaces

• Apply deicing or anti-icing fluids to remove frost

• Proceed without deicing and continue preflight checks

Which statement best describes the surge tank function in this aircraft’s fuel system?

• Houses boost pumps for crossfeed operation

• Balances wing weight during asymmetric loading

• Stores additional usable fuel for engine feed

• Collects overflow and vents excess fuel safely

In the wing diagram, which pair of ribs bounds the surge tanks for the main tanks, determining where surge tank access doors are located?

• Ribs 1 and 5 near side-of-body

• Ribs 5 and 22 mid-wing area

• Ribs 22 and 25 near the tip

• Ribs 8 and 12 outboard ribs

At the right-wing refueling station, which power source will allow refueling when the airplane is connected to external power but the battery switch is OFF?

• Switched hot battery bus available power

• APU supplying DC bus 2

• BPCU internal transformer rectifier

• Ground service bus

Refueling valves are actuated by which control during normal operations?

• Pneumatic actuator with bleed air

• Hydraulic ram driven by engine pump

• Mechanical linkage from cockpit lever

• Solenoid controlled by fuel pressure

What feature on each refueling valve permits manual operation if electrical control is unavailable?

• Manual override plunger

• Secondary bypass spool

• Emergency lockout pin

• Auxiliary handwheel

Which port is used to remove fuel from tanks through the manifold during transfer or maintenance?

• Vent surge port

• Drain mast

• Defuel port

• Return recirculation port

What condition causes the refueling float switch to remove power to a refueling valve solenoid?

• Tank reaches full level

• Tank temperature decreases

• Manifold pressure exceeds limit

• Boost pump turns off