# 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 4 of 5.
Md mina, said:
7 years ago

Yes, A is correct.

NabaJyoti said:
7 years ago

It is Directly proportional to D.

Manikanta said:
7 years ago

Q = A.V.

A = π/4D2.

Q is directly proportional to d2.

A = π/4D2.

Q is directly proportional to d2.

Patel jigar k said:
7 years ago

The correct answer is A,

q = d.

h =d^2.

p = d^3.

q = d.

h =d^2.

p = d^3.

Ashutosh said:
7 years ago

According to affinity law.

Flow or discharge is directly proportional to impeller diameter if the speed of the shaft is constant.

Flow or discharge is directly proportional to impeller diameter if the speed of the shaft is constant.

Parameswararao said:
7 years ago

Is directly proportional to the square of the diameter (refer R. K. Rajput textbook pg no. 1219).

Sarat said:
7 years ago

Option A is the correct answer.

HEMANT said:
7 years ago

We know that Q = pi * d * b * vf.

So that is directly proportional to d.

So that is directly proportional to d.

Jwala said:
7 years ago

The correct answer should be A.

Smith said:
8 years ago

The discharge flow rate of a centrifugal pump is directly proportional to diameter. Discharge head is directly proportional to the square of the diameter. And power is directly proportional to the cube of the diameter. You can understand all this with the help of affinity laws.

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