Refer to the drawing of a pump with a recirculation line. Valve A will close when pump ___

Refer to the drawing of a pump with a recirculation line (see figure below).

centrifugal pump with a recirculation line -PG-10

Valve A will close when pump…

A. discharge pressure increases above a setpoint.
B. discharge pressure decreases below a setpoint.
C. flow rate increases above a setpoint.
D. flow rate decreases below a setpoint.

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Answer: C

Share your understanding of this question with the correct explanation.

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Answer is c