USCG USCG General Eng
Set 16 • Question #238 of 498
Launch Interactive Practice Room A knocking sound from one cylinder of an operating air compressor indicates __________.
A
a defective or broken high pressure unloader
B
a loose valve plate
✓ Correct Answer
C
excessive overload
D
no compression
USCG NMC Regulatory Explanation
In USCG Marine Engineering General Subjects, for engine room systems involving 'A knocking sound from one cylinder of an operating air compressor indicates', the standard operating requirement is: 'a loose valve plate'.
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