USCG USCG Motor
Set 9 • Question #376 of 382
Launch Interactive Practice Room For any piston ring to operate smoothly without scuffing, the ring must be _________________.
A
of a material harder than the cylinder liner
B
properly lubricated
✓ Correct Answer
C
prevented from compressing
D
prevented from rotating during engine operation
USCG NMC Regulatory Explanation
In USCG Motor Plants (Diesel Engineering), regarding 'For any piston ring to operate smoothly without scuffing, the ring must be', the correct operational principle is: 'properly lubricated'.
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