USCG USCG General Eng
Set 1 • Question #30 of 498
Launch Interactive Practice Room Which of the listed conditions can lead to cavitation in a centrifugal pump?
A
Vapor pockets formed in the suction flow stream.
✓ Correct Answer
B
Rough casing volute surfaces
C
Worn wearing rings
D
Partial restriction in the discharge valve
USCG NMC Regulatory Explanation
Cavitation occurs when local static pressure inside a pump drops below liquid vapor pressure, forming vapor bubbles that collapse violently in higher pressure regions, causing noise, vibration, and metal pitting erosion.
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