B-747 ORAL QUESTION BANK & REVIEW FUEL SYSTEM. A TEST WITH COMPLETE ANSWERS.

B-747 ORAL QUESTION BANK &
REVIEW: FUEL SYSTEM. A TEST WITH
COMPLETE ANSWERS




How is Center Wing Tank Fuel scavenged in 400/-8? - correct answer- CWT
NN NN NN NN NN NN NN NN NN NN NN NN NN



fuel is scavenged by 4 jet pumps pumping into main tanks 2 and 3
NN NN NN NN NN NN NN NN NN NN NN NN NN NN




- Scavenge begins when main tank 2 or 3 fuel quantity decreases to
NN NN NN NN NN NN NN NN NN NN NN NN



approximately 27,200 kgs
NN NN NN




Which crossfeed valves are controlled by Fuel System Management logic when
NN NN NN NN NN NN NN NN NN NN



setting T/O flaps? - correct answer- Crossfeed 2 and 3
NN NN NN NN NN NN NN NN NN NN NN




During the Before Start Procedure, at what center wing tank quantity are you
NN NN NN NN NN NN NN NN NN NN NN NN



required to select the center wing pumps on?
NN NN NN NN NN NN NN NN NN



Quantity in lbs for the LCF? - correct answer- - 7,700 kgs or more in center
NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN NN



wing tank
NN NN




- 17,000 lbs or more in center wing tank
NN NN NN NN NN NN NN NN




Main tank 2 and 3 override/jettison pumps can operate to a standpipe level of
NN NN NN NN NN NN NN NN NN NN NN NN NN



approximately _____ kgs (400), _____ lbs (LCF) and _____ kgs (-8) of fuel
NN NN NN NN NN NN NN NN NN NN NN NN NN



remaining in each tank? - correct answer- - 3,200 kgs
NN NN NN NN NN NN NN NN NN NN NN




- 7000 lbs
NN NN




- 3450 kgs
NN NN




Describe how the fuel quantity indication changes upon termination of fuel
NN NN NN NN NN NN NN NN NN NN



jettison: - correct answer- - The fuel to remain quantity indication changes from
NN NN NN NN NN NN NN NN NN NN NN NN NN NN



magenta to white.
NN NN NN NN



- The fuel to remain quantity flashes for 5 seconds.
NN NN NN NN NN NN NN NN NN




How does Center Wing Tank Fuel scavenge in the LCF? - correct answer-
NN NN NN NN NN NN NN NN NN NN NN NN NN



CWT electric pump into main tank 2 when:
NN NN NN NN NN NN NN NN



- CWT override/jettison pump has low pressure
NN NN NN NN NN NN NN



- Fuel quantity in main tank 2 OR 3 tank is below 40,200 lbs
NN NN NN NN NN NN NN NN NN NN NN NN NN NN