Question 296General Subjects - QMED

70% to pass

A centrifugal pump may fail to deliver water when first started if the _______________.

Aseal ring is improperly located
Bpump is not primed
Cwater seal pipe is plugged
Dimpeller is flooded
AI Explanation

The correct answer is B) the pump is not primed. A centrifugal pump requires the pump casing and suction line to be filled with liquid before it can operate effectively. If the pump is not primed, it will not be able to draw in and deliver water when first started. Priming the pump ensures that the pump casing and suction line are completely filled with water, allowing the pump to create the necessary suction to draw in and discharge water. The other options are incorrect because they do not directly relate to the pump's ability to deliver water when first started. The seal ring, water seal pipe, and impeller flooding are not the primary reasons a centrifugal pump would fail to deliver water upon initial startup.

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