A motor-driven centrifugal pump exhibits indications of pump failure while being started in an idle cooling water system.
Assuming the pump motor breaker does not trip, which one of the following pairs of indications would be observed if the failure is a locked pump shaft?
A. Lower than normal running current with zero system flow rate.
B. Lower than normal running current with a fraction of normal system flow rate.
C. Excessive duration of peak starting current with zero system flow rate.
D. Excessive duration of peak starting current with a fraction of normal system flow rate.
Show Answer
Answer: C
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