A single-stage (single impeller) centrifugal pump and a two-stage (two impellers) centrifugal pump have identical head-capacity curves.
The pumps are connected to identical suction and discharge piping in a water system.
Compared to the single-stage pump, the two-stage pump produces the same flow rate at about __________ pump discharge head; and for the same flow rate, the two-stage pump requires __________ net positive suction head.
A. twice the; less
B. twice the; more
C. the same; less
D. the same; more
Show Answer
Answer: C
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