Mechanical Engineering - Hydraulic Machines - Discussion
Discussion Forum : Hydraulic Machines - Section 1 (Q.No. 1)
1.
Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.
Discussion:
34 comments Page 1 of 4.
Nani said:
3 years ago
As per affinity law, break horse power is directly proportional to cube of diameter or cube of rpm.
(5)
Sandeep said:
7 years ago
d^4 will be the correct answer. Since the question is asked as directly proportional the tangent flow of an impulse turbine always takes 4th power to diameter.
(2)
Mahi ss said:
9 years ago
The right answer is P proportional to D^5.
(1)
Sreejith said:
9 years ago
Power is proportional to fifth power of diameter.
Ravi said:
9 years ago
It is 1/4 of the diameter.
Dipanjan said:
8 years ago
I agree @Sreeejith.
Indrajeet said:
8 years ago
According to affinity law of pump.
Power is directly proportional to the fifth Power of diameter.
Power is directly proportional to the fifth Power of diameter.
Jigar k patel said:
8 years ago
Correct Ans is C.
Law 2c Power is proportional to the cube of impeller diameter (assuming constant shaft speed):
{\displaystyle {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}} {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}.
Law 2c Power is proportional to the cube of impeller diameter (assuming constant shaft speed):
{\displaystyle {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}} {P_{1} \over P_{2}}={\left({D_{1} \over D_{2}}\right)^{3}}.
Vinit said:
8 years ago
The Correct answer will be d^5.
Pabitra said:
8 years ago
Fifth power of diameter will be the correct answer.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers