Refer to the pump performance curves for a centrifugal cooling water pump (see figure below).
The pump is being driven by a single-speed AC induction motor.
Pump flow rate is being controlled by a throttled discharge flow control valve.
The following initial pump conditions exist:
Motor current = 100 amps
Pump flow rate = 800 gpm
What will be the approximate value of pump motor current if the flow control valve is repositioned such that pump flow rate decreases to 400 gpm?
A. Less than 15 amps
B. 25 amps
C. 50 amps
D. Greater than 75 amps
Show Answer
Answer: D
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