Mechanical Engineering - Steam Nozzles and Turbines

Exercise : Steam Nozzles and Turbines - Section 3
21.
In velocity compounding of an impulse turbine, the expansion of steam takes place in a nozzle or a set of nozzles from the boiler pressure to condenser pressure.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
The critical pressure ratio is given by (where p1 = Initial pressure of steam, and p2 = Pressure of steam at throat or critical pressure)
p1 p2
p1/p2
p2/p1
p1 + p2
Answer: Option
Explanation:
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23.
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
back pressure turbine
pass out turbine
low pressure turbine
impulse turbine
Answer: Option
Explanation:
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24.
The stage efficiency is the ratio of energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam.
True
False
Answer: Option
Explanation:
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25.
Stage efficiency is also known as
diagram efficiency
nozzle efficiency
gross efficiency
none of these
Answer: Option
Explanation:
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