Chemical Engineering - Fluid Mechanics - Discussion

Discussion Forum : Fluid Mechanics - Section 1 (Q.No. 11)
11.
With increasing flow rate, the hydraulic efficiency of a centrifugal pump
monotonically decreases.
decreases and then increases.
remains constant.
increases and then decreases.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
29 comments Page 1 of 3.

Bhashkar singh said:   6 months ago
I think option D is the correct answer.

Mongam Damodhar rao said:   1 year ago
I think option D is the correct answer.
(1)

Shivam Rathor said:   1 year ago
According to me, option D is correct because when we plot a curve between flow rate and efficiency shows same.
(1)

Subhadip Saha said:   2 years ago
From Pump Characteristic Curve, With an increasing flow rate, the hydraulic efficiency of a centrifugal pump first increase to the peak efficient point and then decreases.

The correct answer is option D.
(1)

Chayanika said:   2 years ago
I think D is the correct answer.

Ganesh said:   3 years ago
Monotonic means there is no constant value. When the efficiency starts falling it falls sharply or continuosly in this case.
(1)

Sahil Khan said:   4 years ago
Hydraulic efficiency of the pump is defined as the ratio of fluid Power to absorbed power. This efficiency is maximum only at one capacity value. It is lower in other capacities.

So the correct answer should be; increases and then decreases.
(2)

Ram said:   4 years ago
Thanks all for explaining the answer.

Dev said:   4 years ago
Hydraulic efficiency = Total head/ideal head.

So I think it should remain same.

Dharmendra kumar said:   4 years ago
Hydraulic efficiency = Q*H.

When Q increases and then H will decrease so here two opposite factor work together so practically it has seen that initially, hydraulic efficiency increase to a BEP and then decrease, so answer D is correct.


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