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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

0.78
0.63
0.74
0.56

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Steam Boilers, Engines, Nozzles and Turbines
Orsat meter is used for

Gravimetric analysis of the flue gases
Volumetric analysis of the flue gases
Measuring smoke density of flue gases
Mass flow of the flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Thermal equilibrium means that the flow of steam is

Isothermal
Polytropic
Isentropic
Hyperbolic

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Steam Boilers, Engines, Nozzles and Turbines
The mechanical draught _________ with the amount of smoke.

Decreases
Does not effect
None of these
Increases

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals that of the surroundings
Equals the pressure of water in the container
Equals to atmospheric pressure
Equals 760 mm of mercury

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