The discharge valve for a radial-flow centrifugal cooling water pump is closed in preparation for starting the pump.
After the pump is started, the following stable pump pressures are observed:
Pump discharge pressure = 30 psig
Pump suction pressure = 10 psig
With the discharge valve still closed, if the pump speed is doubled, what will be the new pump discharge pressure?
A. 80 psig
B. 90 psig
C. 120 psig
D. 130 psig
Share your understanding of this question with the correct explanation.