# Mechanical Engineering - Hydraulic Machines - Discussion

Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 6)

6.

Discharge of a centrifugal pump is

Answer: Option

Explanation:

**Discharge** of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller.

**Head** of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller.

**Power Developed** of a centrifugal pump is directly proportional to (Diameter)^4 of its impeller.

Discussion:

49 comments Page 2 of 5.
Hemanth G said:
6 years ago

Here the discharge is asked,

I believe discharge refers to the outlet of the centrifugal compressor so

Q= π* D*B*Vf2 is the formula, that means A-option is the correct one to be chosen.

I believe discharge refers to the outlet of the centrifugal compressor so

Q= π* D*B*Vf2 is the formula, that means A-option is the correct one to be chosen.

Deepak Rathva said:
6 years ago

Q= π x D x B x Vf.

Here, B also depends on D.

Vf depends on u means depends on DN,

So Q is directly proportional to D^3,

So all options are wrong.

Here, B also depends on D.

Vf depends on u means depends on DN,

So Q is directly proportional to D^3,

So all options are wrong.

Pal said:
6 years ago

Q= π*D*v*b and v=πdN/60.

So the right answer is proportional to d^2.

So the right answer is proportional to d^2.

ANGARI ABHINAY said:
6 years ago

Discharge of centrifugal pump formula π*D*b*V,

Also, Discharge Head is directly proportional to D^2,

Power is Directly proportional to N^3.

Also, Discharge Head is directly proportional to D^2,

Power is Directly proportional to N^3.

Debashis said:
6 years ago

Yes, option: C is correct.

Debashis said:
6 years ago

Option C is correct.

Saboor khan kamali said:
6 years ago

It is directly proportional to the square of the diameter.

Bapi said:
6 years ago

Q/{N(D^3)}=constant.

So the correct answer is Q is directly proportional to cube of the diameter(D) of the impeller.

So the correct answer is Q is directly proportional to cube of the diameter(D) of the impeller.

Meet Patel said:
6 years ago

Q is directly proportional to D^3.

Ali said:
6 years ago

Answer C is correct.

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