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The assistant engineer reports an installed centrifugal pump has a history of running higher than normal amperage since new construction. Capacity and discharge head for the pump are more than adequate. All other system parameters are normal. The best way to reduce the pump load is to do which of the following?
A) By replace the pump with a new pump.
B) By reducing the impeller diameter.
C) By install a bypass line between the pump discharge and suction.
D) By place another equal size pump in parallel.
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