USCG USCG General Eng
Set 3 • Question #313 of 498
Launch Interactive Practice Room A grease lubricated ball bearing or roller bearing will run cooler if the grease __________.
A
fills only 10% of all void spaces within the bearing
B
has a high grease penetration number (is hard)
✓ Correct Answer
C
is thinned with a suitable lubricating oil
D
is heated prior to packing the bearing
USCG NMC Regulatory Explanation
In USCG Marine Engineering General Subjects, for engine room systems involving 'A grease lubricated ball bearing or roller bearing will run cooler if the grease', the standard operating requirement is: 'has a high grease penetration number (is hard)'.
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