Mechanical Engineering - Steam Nozzles and Turbines

Exercise :: Steam Nozzles and Turbines - Section 3

26. 

A single stage turbine is not used because it requires large reduction gearing due to very high rotational speed.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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27. 

In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is

A. low
B. very low
C. high
D. very high

Answer: Option D

Explanation:

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28. 

A nozzle is said to be a convergent-divergent nozzle, when the cross-section of a nozzle first decreases from its entrance to throat and then increases from its throat to exit.

A. True
B. False

Answer: Option A

Explanation:

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29. 

In an impulse reaction turbine, the pressure drops gradually and continuously over

A. fixed blades
B. moving blades
C. both fixed and moving blades
D. none of these

Answer: Option C

Explanation:

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30. 

When the inlet pressure of steam is equal to the exit pressure, then

A. there is a pressure drop in the nozzle
B. fluid flows through the nozzle
C. pressure drops and fluid flows through the nozzle
D. there is no pressure drop and fluid does not flow through the nozzle

Answer: Option D

Explanation:

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