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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A condenser in a steam power plant

Reduces temperature of exhaust steam
All of these
Increases expansion ratio of steam
Reduces back pressure of steam

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Steam Boilers, Engines, Nozzles and Turbines
Steam engine operates on

Carnot cycle
Brayton cycle
Stirling cycle
Joule cycle

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Steam Boilers, Engines, Nozzles and Turbines
A fusible plug is fitted in small boilers in order to

Control steam dome
Extinguish fire if water level in the boiler falls below alarming limit
Avoid explosion
Avoid excessive build up of pressure

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Steam Boilers, Engines, Nozzles and Turbines
Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value

(1 + moisture content)
1 – moisture content
1 + moisture content
(1- moisture content)

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler is

Stationary fire tube boiler
Internally fired boiler
Horizontal boiler
All of these

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Steam Boilers, Engines, Nozzles and Turbines
The coal requirement per kW hour generation in the thermal power plant is of the order of

0.6 to 0.8 kg
0.1 to 0.2 kg
1.0 to 1.5 kg
0.2 to 0.4 kg

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