USCG USCG Motor
Set 6 • Question #279 of 382
Launch Interactive Practice Room Proper lubrication of the main bearings is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because __________.
A
bearing pressure in a four-stroke/cycle single acting diesel engine is continually reversed
✓ Correct Answer
B
bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed
C
the maximum bearing pressure is higher in a single acting two- stroke/cycle diesel engine
D
two-stroke/cycle diesel engines require more complicated lubrication piping
USCG NMC Regulatory Explanation
In USCG Motor Plants (Diesel Engineering), regarding 'Proper lubrication of the main bearings is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because', the correct operational principle is: 'bearing pressure in a four-stroke/cycle single acting diesel engine is continually reversed'.
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