Refer to the drawing of an operating cooling water system (see figure below).
Initially, centrifugal pump A is circulating water at 100°F.
If the temperature of the cooling water entering pump A increases to 200°F, the pump’s motor current will…
(Assume the pump’s volumetric flow rate is constant.)
A. increase, because the speed of the pump shaft will increase.
B. decrease, because the speed of the pump shaft will decrease.
C. increase, because the density of the cooling water will increase.
D. decrease, because the density of the cooling water will decrease.
Show Answer
Answer: D
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