Mechanical Engineering - Steam Nozzles and Turbines

Exercise :: Steam Nozzles and Turbines - Section 2

16. 

The velocity of steam, in reaction turbines, is increased in the fixed blades as well as in moving blades.

A. True
B. False

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

17. 

The critical pressure ratio for gases is

A. 0.528
B. 0.546
C. 0.577
D. 0.582

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

18. 

The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.

A. same
B. less
C. more

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

19. 

The effect of supersaturation is that the

A. mass of the steam discharged increases
B. entropy and specific volume of the steam increases
C. exit velocity of steam reduces
D. all of these

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

20. 

The effect of friction on the flow of steam through a nozzle is to

A. decrease the mass flow rate and to increase the wetness of steam
B. increase the mass flow rate and to increase the exit temperature
C. decrease the mass flow rate and to decrease the wetness of steam
D. increase the exit temperature without any effect on mass flow rate

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.