A pump operates at speed of 1160 rpm and delivers water through a 300 m pipe with a diameter of 15.0 cm and a friction coefficient of 0.005 to an elevated tank 20 m above the water level at the suction side. The pump has the following characteristics:
The pump is located 2.75 m above the intake level and the length of the suction pipe is 55 m (which is included in total length of the pipe, 300 m).
a. Determine the discharge and head at which the pump operates.
b. If, during a power failure, the pump is operated by a stand-by diesel engine, which runs at a speed of 1250 rpm, what is the discharge in this case?
c. Will the pump be safe from cavitation when operated by the diesel engine, assuming that the atmospheric pressure is 9.705 m and the vapor pressure is 0.357 m?
d. Is this pump running near its point of best efficiency?
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