ELECTRICAL SYSTEM PE TEST
QUESTIONS & ANSWERS
During engine start, if the BAT DISCH caution illuminates on the CAD, what
corrective action is required? - ANSWER No action is required - It's normal
during engine start
An External Power Unit (EPU) is used for engine start if battery power is less
than VDC. - ANSWER 23.5
When operated by the battery, how many VDC (Volts DC) does the electrical
power supply system supply to the airborne electrical system? - ANSWER 24
The minimum power required to start the UH-72A is Volts? -
ANSWER 23.5
Which components supply electrical power to the UH-72? - ANSWER Starter
Generator
Battery
EPU
The starter-generator automatically transitions from start mode to generator
mode when engine N1 speed exceeds % - ANSWER 40
A separate power module (battery) supplies 24 VDC as emergency power for
the emergency lighting system and the - ANSWER Standby Horizon
On engine start, the ENG START switch disengages at 40% N1, and the
generator is automatically connected to the electrical system when N1 is >
%? - ANSWER 40
Which component converts mechanical energy to electrical energy? -
ANSWER Generator
Electrical power consumers are divided into which 3 busses? - ANSWER
Essential
Shed
QUESTIONS & ANSWERS
During engine start, if the BAT DISCH caution illuminates on the CAD, what
corrective action is required? - ANSWER No action is required - It's normal
during engine start
An External Power Unit (EPU) is used for engine start if battery power is less
than VDC. - ANSWER 23.5
When operated by the battery, how many VDC (Volts DC) does the electrical
power supply system supply to the airborne electrical system? - ANSWER 24
The minimum power required to start the UH-72A is Volts? -
ANSWER 23.5
Which components supply electrical power to the UH-72? - ANSWER Starter
Generator
Battery
EPU
The starter-generator automatically transitions from start mode to generator
mode when engine N1 speed exceeds % - ANSWER 40
A separate power module (battery) supplies 24 VDC as emergency power for
the emergency lighting system and the - ANSWER Standby Horizon
On engine start, the ENG START switch disengages at 40% N1, and the
generator is automatically connected to the electrical system when N1 is >
%? - ANSWER 40
Which component converts mechanical energy to electrical energy? -
ANSWER Generator
Electrical power consumers are divided into which 3 busses? - ANSWER
Essential
Shed
