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ELECTRICAL ENGINEERING PRACTICE EXAM QUESTIONS AND ANSWERS.
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ELECTRICAL ENGINEERING PRACTICE EXAM QUESTIONS AND ANSWERS.
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ELECTRICAL ENGINEERING PRACTICE EXAMQUESTIONS AND ANSWERS.
A flickering ground detection lamp on an AC electrical power panel could
be caused by a ________.
Correct Answer -Ground in a coil of an operating pump motor.
Accidental grounds in a shipboard electrical system must be repaired as
soon as possible as they will __________.
Correct Answer -Damage insulation and may cause outages.
A megohmmeter can be used to test for __________.
Correct Answer -An open field coil.
A megohmmeter is connected to each end of an individual motor
winding. A low ohm reading indicates ___________.
Correct Answer -Good continuity.
When the insulation breaks down within a metal encased, portable,
electrical tool, __________.
Correct Answer -Line voltage may be placed on the tool casing making it
dangerous to operate.
When a fluorescent lamp has reached the end of its useful life, it should
be replaced immediately, or the resultant flashing may _________.
Correct Answer -Damage the lamps starter and ballast circuit.
In the illustrated one line diagram, if the turbo generator fails, the diesel
generator _________.
, Illustration EL-0014
Correct Answer -Will automatically start and supply power to the
emergency power switchboard and the lighting main.
While standing watch underway in the engine room, failure of the normal
power supply will cause the emergency generator to provide power
through __________.
Correct Answer -Its output breaker and automatic bus transfer device.
The diagrams shown in the illustration represent a/an _________.
Illustration EL-0093
Correct Answer -Sound powered telephone system.
Which of the following methods should be used to dress the face of silver-
plated motor controller contacts?
Correct Answer -Sanding with 0000 sandpaper.
To effectively clean a commutator in a good physical condition, you
should use ________.
Correct Answer -A canvas wiper.
Which of the listed precautions should be taken when cleaning the
internals of a motor with compressed air?
Correct Answer -- Open the machine on both ends so as to allow the air
and dust to escape
- Be certain that the circuit breaker is opened and tagged on the feeder
panel
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