Download Pumps Problems 20 Items PDF

TitlePumps Problems 20 Items
File Size205.4 KB
Total Pages10
Document Text Contents
Page 7

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13. A pump is used to deliver 50 li/sec of sea water at a speed of 120 rpm. If speed will

increased to 135 rpm, determine the increased in pump capacity.

Solution:































14. A 15 kW motor running at 350 rpm is used to drive a pump. If speed will changed to

370 rpm, what is the increased in power?

Solution:



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Page 9

17. A vacuum pump is used to drain a flooded mine shaft of 20°C water. The pump

pressure of water at this temperature is 2.34 kPa. The pump is incapable of lifting the

water higher than 10.16 m. What is the atmospheric pressure?

Solution:

Using Bernoulli’s Theorem































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18. It is desired to deliver 5 gpm at a head of 640 m in a single pump having specific

speed not to exceed 40. If the speed is not to exceed 1352 rpm, how many stages are

required?

Solution:













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Solve for number of stages:

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