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Engine · 1,128 questions

General Subjects - USCG Exam Questions

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After a disassembly of a single stage centrifugal pump, one finds the outer circumference of the impeller badly pitted and worn. Not having a spare impeller on board, it is decided to turn down the impeller to eliminate the wear/pitting. What will be the pump capacity, in GPM, after the reduction of impeller diameter by 0.5 inches? GIVEN: Original pump capacity = 30 GPM Original impeller diameter = 8 in.

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li liam.fisher87 · Oct 10, 2020
Calculate using impeller's circumference and not the impeller's area.

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Practice 1,128 real U.S. Coast Guard Engine exam questions from General Subjects. Here's a random one. Answer it, then keep going with Next.

General engineering knowledge: watchkeeping, pumps and piping systems, hydraulics, instrumentation, and shipboard maintenance.

The Engine pool holds the current U.S. Coast Guard questions for engineering credentials, from QMED ratings through DDE and Assistant Engineer up to Chief. Answer any question to see the correct choice instantly.