Question: P r 2 ( 5 0 pt ) : The 1 7 in impeller diameter pump given below, operating at 1 7 7 0 rpm
pt: The in impeller diameter pump given below, operating at rpm is to pump gpm of water at in the system shown below. The total length of pipe is ft with ft on the suction side and ft on the discharge side and the inner pipe diameter is in The surface of the left tank is There are two deg regular elbows both downstream of the pump and entrance and exit losses. The absolute roughness for cast iron is ft The density of the water is and the dynamic viscosity is
a pt Compute the minor friction losses.
b pt Compute major friction losses
c pt What is the head delivered by the pump?
d pt Determine the value of
e Compute the power delivered to the water by the pump.
f pt Compute the power supplied by the motor.
g pt What is the NPSHr for the pump for the flow condition.
h pt If the water is at instead of what is the NPSHa at the pump inlet. Assume the left tank is at atmospheric pressure and the inlet line to the pump is at Will cavitation occur at the inlet to the pump? Give all calculations to support your answer.
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