Find the answer to the multiple-choice question
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This post was last edited by flute6 on 2011-5-11 21:12. What is the function of the bottom valve in the suction pipeline of a centrifugal pump? A. Preventing solid particles in liquids ； B. Avoid cavitation ； C. Maintain the minimum allowable suction height ； D. Prevent the liquid filled before startup from leaking out of the pump ；
Are you setting a question? Hehe D
Judging from the question, it should be D, but one can check whether the centrifugal pump is a type of Froth Pump. and drainage.
This post was last edited by ray1513 on 2011-5-12 at 13:28 D
This question is easy to understand: a centrifugal pump cannot draw in air. If air is present, it cannot perform work and cannot draw water. Therefore, the only purpose of the foot valve is to ensure that the inlet pipeline of the pump is filled with liquid at the time of startup. It works on the same principle as rural artesian wells, where a ladle of water must be added before pumping water to fill the well pipes.
I think D should be chosen; this is equivalent to providing a tank pump for the centrifugal pump, and the bottom valve in the pipeline of a centrifugal pump is usually a check valve.
Reply to 4# ray1513: Regarding the company’s exam questions, I think the answer is D, but everyone else says it should be A; so I’m asking everyone for their opinions
Are there some pumps that no longer require priming?
ABCD: The bottom valve with a filter can prevent solid particles in the liquid from passing through. It functions as a one-way valve, serving primarily to prevent the liquid that has been filled in before startup from leaking out of the pump； The purpose of doing this is to avoid cavitation and maintain the lowest allowable suction lift ；
The function of the bottom valve in the suction pipeline of a centrifugal pump is (D). A. Preventing solid particles in liquids ； B. Avoid cavitation ； C. Maintain the minimum allowable suction height ； D. Prevent the liquid filled before startup from leaking out of the pump ；