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

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

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation is defined as

The amount of water evaporated from and at 100°C into dry and saturated steam
The amount of water evaporated or steam produced in kg per kg of fuel burnt
The ratio of heat actually used in producing the steam to the heat liberated in the furnace
The evaporation of 15.653 kg of water per hour from and at 100°C

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Steam Boilers, Engines, Nozzles and Turbines
The function of an eccentric rod is

To provide reciprocating motion to the slide valve
To provide simple harmonic motion to the D-slide valve
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To convert reciprocating motion of the piston into rotary motion of the crank

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