USCG USCG General Eng
Set 4 • Question #333 of 498
Launch Interactive Practice Room The exposed portion of the outboard propeller shaft is protected against seawater corrosion by __________.
A
a heavy lubricant
B
a covering of plastic, rubber, or shrunk-on composition sleeve
✓ Correct Answer
C
a corrosion-resistant paint
D
a layer of oxidation formed when the metal of the shaft is exposed to seawater
USCG NMC Regulatory Explanation
In USCG Marine Engineering General Subjects, for engine room systems involving 'The exposed portion of the outboard propeller shaft is protected against seawater corrosion by', the standard operating requirement is: 'a covering of plastic, rubber, or shrunk-on composition sleeve'.
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