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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which of the following varieties of coals is mostly used in steam boilers?

None of the listed here
Brown coal
Non-coking bituminous coal
Peat

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Steam Boilers, Engines, Nozzles and Turbines
The expansion of steam, as it flows over the blades in reaction turbine, represents

Free expansion process
Isothermal process
Isentropic process
Throttling process

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about the function of furnace?

Maintain heat supply to prepare and ignite the incoming fuel
Separate ash from coal
To provide proper conditions for continuous complete combustion
Mix fuel with air and ignite

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

None of the listed here
Equal to
Less than
More than

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

0.3
0.2
0.45
0.15

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Steam Boilers, Engines, Nozzles and Turbines
The average value of diagram factor lies between

0.8 to 1.2
0.2 to 0.5
0.65 to 0.9
0.5 to 0.65

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