E145 Electrical System Exam Questions
and Answers Graded A+
Power to the EMB 145/140 DC system is supplied by - Correct answer--4
Independent Generators (28V DC/400 engine driven)
-1 APU starter generator (28V DC400/A)
-2 Nickel Cadmium Batteries (24V DC/44 Ahr @ 1 hr rate)
-1 lead acid backup battery (24V DC/5 Ahr @ 10 hr rate)
-External Power (Does not charge batteries)
Electrical System Management is performed by - Correct answer--Electrical
Distribution Logic
-5 Generator Control Units
Which generators supply the left electrical network? - Correct answer-1 and 3
Can the APU generator be used to replace any failed engine-driver generators? -
Correct answer-Yes.
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, To what generators is the APU normally connected to parallel? - Correct answer-2
and 4
The electrical page on the MFD supplies information on: - Correct answer-1.
2.
3.
4.
Where is the electrical power receptacle located? - Correct answer-Left side of the
airplane nose.
Which batteries provide electrical power for APU starting? - Correct answer-
Battery #2
How many minutes of power can both batteries provide for essential loads in case
of all generator failure in flight? - Correct answer-40 minutes
The system will automatically de-energize the ___ buses if the only source of
electrical power on the ground is the batteries. - Correct answer-Shed
You will get a BATT 1(2) OVTEMP warning message on the EICAS when the
associated battery temperature exceeds ___ degrees C. - Correct answer-70 degrees
Celsius
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
and Answers Graded A+
Power to the EMB 145/140 DC system is supplied by - Correct answer--4
Independent Generators (28V DC/400 engine driven)
-1 APU starter generator (28V DC400/A)
-2 Nickel Cadmium Batteries (24V DC/44 Ahr @ 1 hr rate)
-1 lead acid backup battery (24V DC/5 Ahr @ 10 hr rate)
-External Power (Does not charge batteries)
Electrical System Management is performed by - Correct answer--Electrical
Distribution Logic
-5 Generator Control Units
Which generators supply the left electrical network? - Correct answer-1 and 3
Can the APU generator be used to replace any failed engine-driver generators? -
Correct answer-Yes.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, To what generators is the APU normally connected to parallel? - Correct answer-2
and 4
The electrical page on the MFD supplies information on: - Correct answer-1.
2.
3.
4.
Where is the electrical power receptacle located? - Correct answer-Left side of the
airplane nose.
Which batteries provide electrical power for APU starting? - Correct answer-
Battery #2
How many minutes of power can both batteries provide for essential loads in case
of all generator failure in flight? - Correct answer-40 minutes
The system will automatically de-energize the ___ buses if the only source of
electrical power on the ground is the batteries. - Correct answer-Shed
You will get a BATT 1(2) OVTEMP warning message on the EICAS when the
associated battery temperature exceeds ___ degrees C. - Correct answer-70 degrees
Celsius
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
