B-747 ELECTRICAL EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
The left and right utility Buss switches power
B-FUN. to get good service
Battery chargers
Fuel pumps
Upper deck doors
Nav lights
The _____ _____ bus normally powers the hot battery busses through their
respective battery chargers.
Ground Service
If you move the BUS TIE switch to the ISLN position, the _____ and DC isolation
relays are open.
BTB
Automatic load shedding occurs by first shedding the galleys and the utility
busses, but when the overload condition is relieved, the system automatically
restores the utility and galley busses in _____ order.
Reverse
, There is a switch at the Door _____ which will power the ground service bus if No.
1 AC bus is not powered and the aircraft is on the ground.
1 left
With the exception of auto-land operations, the AC bus _____ light will illuminate
due to a _____ or if the switch is moved to the ISLN (off) position.
ISLN, fault
If the generator control breaker opens because of a fault, or if there is ____ oil
pressure or ____ oil temperature, the lDG DRIVE light will illuminate.
Low or high
The APU GEN AVAIL light indicates that the electrical ____ and ____ are within
normal limits.
Voltage and frequency
You know the APU power breaker is closed and it is connected to the tie bus
when the ______ memo message
APU GEN ON
If the STAND BY POWER selector is moved to the _____ position during a test,
you would expect the captain's PFD, ND, FMC and the primary EICAS to remain
powered.
BAT
The Split System Breaker will _____ if four engine lDG'S are powering the AC
busses and the EXT PWR 1 is selected created two separate circuits EXT PWR 1
per the left side of the Tie Bus and IDG'S 3 and 4 powering the right side.
Open
COMPLETE SOLUTIONS VERIFIED
The left and right utility Buss switches power
B-FUN. to get good service
Battery chargers
Fuel pumps
Upper deck doors
Nav lights
The _____ _____ bus normally powers the hot battery busses through their
respective battery chargers.
Ground Service
If you move the BUS TIE switch to the ISLN position, the _____ and DC isolation
relays are open.
BTB
Automatic load shedding occurs by first shedding the galleys and the utility
busses, but when the overload condition is relieved, the system automatically
restores the utility and galley busses in _____ order.
Reverse
, There is a switch at the Door _____ which will power the ground service bus if No.
1 AC bus is not powered and the aircraft is on the ground.
1 left
With the exception of auto-land operations, the AC bus _____ light will illuminate
due to a _____ or if the switch is moved to the ISLN (off) position.
ISLN, fault
If the generator control breaker opens because of a fault, or if there is ____ oil
pressure or ____ oil temperature, the lDG DRIVE light will illuminate.
Low or high
The APU GEN AVAIL light indicates that the electrical ____ and ____ are within
normal limits.
Voltage and frequency
You know the APU power breaker is closed and it is connected to the tie bus
when the ______ memo message
APU GEN ON
If the STAND BY POWER selector is moved to the _____ position during a test,
you would expect the captain's PFD, ND, FMC and the primary EICAS to remain
powered.
BAT
The Split System Breaker will _____ if four engine lDG'S are powering the AC
busses and the EXT PWR 1 is selected created two separate circuits EXT PWR 1
per the left side of the Tie Bus and IDG'S 3 and 4 powering the right side.
Open
