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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very low pressure, (510 kg/cm²) when throttled to atmosphere will become

Wet
Remain dry saturated
Superheated
Dry

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are

Externally fired
None of these
Internally fired
Internally as well as externally fired

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of Cornish boiler is of the order of

23 m
12 m
1.52.5 m
2.53.5 m

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

Induced steam jet draught
Chimney draught
None of these
Forced steam jet draught

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Steam Boilers, Engines, Nozzles and Turbines
The pressure at which latent heat of vaporisation of water is zero, is

100 kg/cm²
225.6 kg/cm²
1 kg/cm²
Below atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
Relative percentage of heat absorbed through the heat transfer of(i) Furnace water wall(ii) Boiler tank(iii) Superheater(iv) Economizer(v) Air-heater of a typical boiler of 200 MW capacity would be of the order of

48 : 20 : 15 : 7 : 10
7 : 15 : 20 : 10 : 48
20 : 48 : 7 : 15 : 10
10 : 7 : 15 : 20 : 48

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