An AC induction motor is connected to a radial-flow centrifugal pump in a cooling water system.
When the pump is started, the time period required to reach a stable running current will be shorter if the pump discharge valve is fully __________; and the stable running current will be lower if the pump discharge valve is fully __________.
A. open; open
B. open; closed
C. closed; open
D. closed; closed
Show Answer
Answer: D
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