Steam and Gas Turbines Questions and Answers – Relationship between Velocity Ratios

This set of Steam and Gas Turbines Multiple Choice Questions & Answers (MCQs) focuses on “Relationship between Velocity Ratios”.

1. Velocity ratio is represented by ___________
a) Alpha
b) Beta
c) Sigma
d) None of the mentioned
View Answer

2. For single stage impulse turbine optimum sigma value lies between ____________
a) 0.4 and 0.6
b) 0.2 and 0.4
c) 0.1 and 0.3
d) none of the mentioned
View Answer

3. For two stage impulse turbine optimum sigma value lies between __________
a) 0.3 and 0.5
b) 0.2 and 0.4
c) 0.1 and 0.5
d) none of the mentioned
View Answer

4. For reaction turbines the optimum sigma value lies between _____________
a) 0.8 and 1.0
b) 0.6 and 1.0
c) 0.4 and 0.8
d) none of the mentioned
View Answer

5. Speed of the blade to speed of the gas ratio can be denoted by ___________
a) Alpha
b) Sigma
c) Gamma
d) None of the mentioned
View Answer

6. Best velocity ratio for four row impulse turbine is ________
a) one seventh
b) one sixth
c) half
d) none of the mentioned
View Answer

6. Efficiency of the four row impulse turbine with a velocity ratio of one seventh is ______
a) 55%
b) 44%
c) 34%
d) 77%
View Answer

7. Velocity ratio is the integral of ________ of the velocity in each row.
a) fourth power
b) cube
c) square
d) none of the mentioned
View Answer

8. Velocity ratio is directly proportional to square of velocity.
a) True
b) False
View Answer

9. When velocity in each row increases its velocity ratio __________
a) decreases
b) remains constant
c) increases
d) none
View Answer

10. Velocity ratio is directly proportional to velocity in each row.
a) True
b) False
View Answer

Sanfoundry Global Education & Learning Series – Steam and Gas Turbines.

To practice all areas of Steam and Gas Turbines, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]