Mechanical Engineering - Hydraulic Machines - Discussion
Discussion Forum : Hydraulic Machines - Section 3 (Q.No. 7)
7.
The efficiency of a reaction turbine for a given head __________ with the increase in speed.
Discussion:
7 comments Page 1 of 1.
Anurup said:
7 years ago
How? Explain.
Goutham said:
7 years ago
Please, explain the answer.
Sachin kumar said:
7 years ago
Efficiency is ratio of power to speed of jet.
So when it's speed is show increase than its efficiency is decrease.
So when it's speed is show increase than its efficiency is decrease.
Kartik Oraon said:
5 years ago
@Sachin Kumar,
In this case, efficiency is the ratio of work done to kinetic energy, if you divide power to speed then, the value will not be dimensionless as efficiency should be dimensionless. There should be some other logic otherwise the question is wrong as when we plot efficiency against speed, it increases in the beginning then decrease at a higher speed.
In this case, efficiency is the ratio of work done to kinetic energy, if you divide power to speed then, the value will not be dimensionless as efficiency should be dimensionless. There should be some other logic otherwise the question is wrong as when we plot efficiency against speed, it increases in the beginning then decrease at a higher speed.
Kartik Oraon said:
5 years ago
@Sachin Kumar.
In this case, efficiency is the ratio of work done to kinetic energy, if you divide power to speed then, the value will not be dimensionless as efficiency should be dimensionless. There should be some other logic otherwise the question is wrong as when we plot efficiency against speed, it increases in the beginning then decrease at a higher speed.
In this case, efficiency is the ratio of work done to kinetic energy, if you divide power to speed then, the value will not be dimensionless as efficiency should be dimensionless. There should be some other logic otherwise the question is wrong as when we plot efficiency against speed, it increases in the beginning then decrease at a higher speed.
Vinay BEL said:
5 years ago
First increases then decreases.
Kailash said:
5 years ago
Agree with you, Thanks @Kartik.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers