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During a trail run on a pump, cavitation occurred when the sum of static pressure and velocity head at inlet was reduced to 3.2m. The pump total head was 35 m at a discharge of 0.045 m3/sec. The vapour pressure of water = 1.8 kPa. And the barometer pressure = 750 mm of Hg. If the pump is to operate at some other location where the atmospheric pressure was reduced to 620 mm of Hg and the temperature is so reduced that the vapour pressure of water is 830 Pa, what is the value of cavitation parameter when the pump develops the same total head and discharge? Is it necessary to reduce the height of the pump and if so, by how much?                             

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