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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will

Flash i.e. get converted into steam
Boil
Remain as it was
Cool down

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Steam Boilers, Engines, Nozzles and Turbines
In a uniflow engine

None of these
Steam enters at the centre and exhausts at the other end
Steam enters and exhausts through the same port
Steam enters at one end and exhausts at the centre

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is

8/3 kg
1 kg
2 kg
4/3 kg

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Steam Boilers, Engines, Nozzles and Turbines
Hygrometry deals with the

Water vapor in air
Temperature of air
Pressure of air
Hygroscopic substances

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Steam Boilers, Engines, Nozzles and Turbines
The temperature of flue gases at air heater outlet should be

Below dew point temperature of flue gases
100°C
Above dew point temperature of flue gases
Less than wet bulb temperature of flue gases

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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