What is the average piston speed of a five cylinder low-speed engine with a bore of 29.5 inches (75 cm), a stroke of 63 inches (160 cm), and a rated speed of 123 RPM?
Official USCG Answer & Rule Citation
Correct Answer: Option B — 1291 ft/min (393 m/min)
Under USCG National Maritime Center examination standards, the accepted correct answer is: 1291 ft/min (393 m/min).
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