Mechanical Engineering - Steam Nozzles and Turbines

Exercise :: Steam Nozzles and Turbines - Section 1

26. 

The critical pressure gives the velocity of steam at the throat

A. equal to the velocity of sound
B. less than the velocity of sound
C. more than the velocity of sound
D. none of these

Answer: Option A

Explanation:

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27. 

The Parsons' reaction turbine has

A. only moving blades
B. only fixed blades
C. identical fixed and moving blades
D. fixed and moving blades of different shape

Answer: Option C

Explanation:

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28. 

The action of steam in a steam turbine is

A. static
B. dynamic
C. static and dynamic
D. neither static nor dynamic

Answer: Option B

Explanation:

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29. 

The blade velocity coefficient is ratio of relative velocity of steam at outlet tip of the blade to the relative velocity of steam at inlet tip of the blade.

A. True
B. False

Answer: Option A

Explanation:

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30. 

Multi-stage steam turbines are of the

A. velocity compounded type
B. reaction type
C. pressure compounded type
D. all of these

Answer: Option D

Explanation:

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