Mechanical Engineering - Steam Nozzles and Turbines

Exercise :: Steam Nozzles and Turbines - Section 1

36. 

The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

A. ηS = ηB x ηN
B. ηS = ηBN
C. ηS = ηNB
D. none of these

Answer: Option A

Explanation:

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37. 

The critical pressure ratio for initially dry saturated steam is more as compared to initially wet steam.

A. Yes
B. No

Answer: Option B

Explanation:

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38. 

In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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39. 

Parson's reaction turbine is a __________ reaction turbine.

A. 40 percent
B. 50 percent
C. 60 percent
D. 70 percent

Answer: Option B

Explanation:

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40. 

The turbine blades are

A. straight
B. circular
C. curved

Answer: Option C

Explanation:

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