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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The maximum efficiency of a reaction turbine is

(1 + cos²α)/2 cos²α
2 cos²α/(1 + cos²α)
(1 + sin²α)/2 sin²α
2 sin²α/(1 + sin²α)

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Steam Boilers, Engines, Nozzles and Turbines
Proximate analysis of fuel is determination of percentage of

Lower calorific value
Carbon, hydrogen, nitrogen, sulphur, moisture
Higher calorific value
Fixed carbon, ash, volatile matter, moisture

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of a thermal power plant is of the order of

0.2
0.15
0.45
0.3

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Steam Boilers, Engines, Nozzles and Turbines
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

20 atmospheres
40 atmospheres
10 atmospheres
30 atmospheres

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Steam Boilers, Engines, Nozzles and Turbines
The bituminous coal is no caking if its carbon content is

81-85%
85-90%
78-81%
90-95%

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is of

Natural circulation type
Stationary < fire tube type
All of the listed here
Horizontal type

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