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

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

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of a boiler is defined as

None of these
Ratio of heat actually used in producing steam to the heat liberated in the furnace
Ratio of the heat liberated in the furnace to the heat actually used in producing steam
Ratio of the mass of steam produced to the mass of total water supplied in a given time

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Steam Boilers, Engines, Nozzles and Turbines
The function of a safety valve is

To measure pressure of steam inside the steam boiler
To blow off steam when the pressure of steam inside the boiler exceeds the working pressure
None of these
To indicate the water level inside the boiler to an observer

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