Mechanical Engineering - Hydraulic Machines - Discussion

35. 

When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.

[A]. Agree
[B]. Disagree

Answer: Option B

Explanation:

No answer description available for this question.

Omar Al Nawaisheh said: (Jan 14, 2015)  
Why when the speed of the pump increases, its net positive suction head (NPSH) requirement decreases? Disagree.

Aru said: (Feb 10, 2015)  
What is the NPSH?

Pratik said: (Jul 4, 2015)  
NPSH (Net Positive Suction Head).

The minimum pressure required at the suction port of the pump to keep the pump from cavitation.

Pradip Nohwar said: (Jun 15, 2016)  
Is it because NPSH remains constant?

Bhuppi said: (Dec 5, 2016)  
The required NPSH increases monotonically while the NPSH actual decreases, and when these two meet, the cavitation starts.

NPSH(required) = (P + v * v/2)inlet - P(vapour)/density.

Amr said: (Jun 28, 2017)  
Why?

Yash Joshi said: (Jan 27, 2018)  
Power is directly proportional to speed. So more power products by pump for suction of low pressure liquid, when you increase speed. So not requirement of more npsh.

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