USCG USCG General Eng
Set 6 • Question #389 of 498
Launch Interactive Practice Room Which of the devices listed prevents water from entering a ship's hull via the propulsion shaft?
A
Stern tube packing or mechanical shaft seal
✓ Correct Answer
B
Deflector ring and drain
C
Spring bearings
D
Oiler rings
USCG NMC Regulatory Explanation
In USCG Marine Engineering General Subjects, for engine room systems involving 'Which of the devices listed prevents water from entering a ship's hull via the propulsion shaft', the standard operating requirement is: 'Stern tube packing or mechanical shaft seal'.
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