Question 98Motor Plants - 1st Asst/Chief

70% to pass

The greatest difference between the centrifuge bowl shown in the illustration and that of a tubular bowl, with straight, vertical, interior surfaces, is that the illustrated unit_______________. Illustration MO-0012

Diagram for USCG Motor Plants Chief: The greatest difference between the centrifuge bowl shown in the illustration...
Adoes not require a discharge ring when operated as a separator
Brotates at 1000 rpm slower than the old tubular bowl type
Crotates at 1000 rpm higher than the old tubular bowl type
Dis self desludging
AI Explanation

The correct answer is D) is self desludging. The key difference between the centrifuge bowl shown in the illustration and a traditional tubular bowl is that the illustrated unit has a conical shape, rather than straight, vertical interior surfaces. This conical shape allows the bowl to be self-desludging, meaning it can continuously remove accumulated solids (sludge) without needing to be shut down for manual cleaning. The other answer choices are incorrect because: A) the discharge ring is still required, B) the rotational speed is not specified, and C) there is no information provided about the rotational speed difference compared to the old tubular bowl.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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