# Mechanical Engineering - Hydraulic Machines - Discussion

Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 6)
6.
Discharge of a centrifugal pump is
directly proportional to diameter of its impeller
inversely proportional to diameter of its impeller
directly proportional to (diameter)2 of its impeller
inversely proportional to (diameter)2 of its impeller
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 5 of 5.

Patel jigar k said:   7 years ago
q = d.
h =d^2.
p = d^3.

Manikanta said:   7 years ago
Q = A.V.
A = π/4D2.
Q is directly proportional to d2.

NabaJyoti said:   7 years ago
It is Directly proportional to D.

Md mina, said:   7 years ago
Yes, A is correct.

Daya said:   7 years ago
I think option A is right.

Venkat said:   7 years ago

Discharge of centrifugal pump is directly proportional to its (dia)^2.
Q = A * V,
Here A = π * D^2/4.

Shiva said:   7 years ago
As Q is directly proportional to B and D and B (width) is proportional to D. Therefore Q is directly proportional to D^2.

Suresh Shinde said:   7 years ago
Q/(N*D^3).

So, the correct answer is directly proportional to D^3.

Rishabh Singh said:   7 years ago
Affinity Law of a pump- Q is proportional to D.