The simplest method to use for determining if a centrifugal pump is operating as designed, is to （）.<br>A:closely observe the pump discharge temperature<br>B:close off the discharge valve, and watch for a rise in pressure<br>C:momentarily close off the suction valve, and watch for a rise in pressure<br>D:use a clamp on ammeter and compare the readings to past records

The simplest method to use for determining if a centrifugal pump is operating as designed, is to （）.
A:closely observe the pump discharge temperature
B:close off the discharge valve, and watch for a rise in pressure
C:momentarily close off the suction valve, and watch for a rise in pressure
D:use a clamp on ammeter and compare the readings to past records

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