Civil Engineering MCQAE Level Civil Engineering
Priming of a centrifugal pump is necessary mainly because the pump cannot start pumping effectively when:
Fluid MechanicsPumpsMEDIUM
Choose the correct answer
A
the casing and suction pipe contain air
B
the delivery valve is open
C
the impeller is made of metal
D
the suction pipe is below the pump
Correct Answer
A. the casing and suction pipe contain air
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A centrifugal pump must be filled with water so the impeller can create the required pressure difference; air in the casing prevents proper suction.
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