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MEK Exit Exam • Set 4 Question 6 of 30

Why diesel engine generator does not have a reversing mechanism

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Direct Answer

Option B: Running reverse it consumes power instead of producing power

Diesel engine generators are not designed with reversing mechanisms because they are coupled to alternators which produce AC power. Running a generator in reverse would cause it to consume electrical power rather than produce it, and it would likely disrupt the ship's electrical grid synchronization.

All Options

A
Running reverse its phase sequence will change
B
Running reverse it consumes power instead of producing power (Correct Answer)
C
Running reverse it produces DC instead of AC
D
Running reverse does not produce power

Detailed Explanation & Context

Diesel engine generators are not designed with reversing mechanisms because they are coupled to alternators which produce AC power. Running a generator in reverse would cause it to consume electrical power rather than produce it, and it would likely disrupt the ship's electrical grid synchronization.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Marine Engineering Knowledge (MEK).

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