USCG USCG General Eng
Set 4 • Question #331 of 498
Launch Interactive Practice Room Positive displacement, helical gear pumps are well suited for pumping oil because __________.
A
stuffing boxes eliminate the leakage problems usually associated with other gear pumps
B
it is not necessary to closely maintain design clearances with this pump
C
they are essentially self- priming and produce a high suction lift
✓ Correct Answer
D
these pumps are designed with extreme tooth angles
USCG NMC Regulatory Explanation
Positive displacement pumps deliver a constant fluid volume per stroke regardless of discharge pressure, are self-priming, and require discharge relief valves to prevent catastrophic over-pressurization.
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