Refer to the drawing of an operating cooling water system (see figure below).
Which one of the following will decrease available net positive suction head for the centrifugal pump?
A. Adding water to the surge tank to raise level by 10 percent.
B. Positioning heat exchanger service water valve B more open.
C. Positioning pump discharge valve C more open.
D. Reducing heat loads on the cooling water system by 10 percent.
Share your understanding of this question with the correct explanation.