Steam Boilers, Engines, Nozzles and Turbines
In recuperative air preheaters, the heat is transferred

From a metal wall from one medium to another
From heating an intermediate material and then heating the air from this material
Heat is transferred by bleeding some gases from furnace
By direct mixing

ANSWER DOWNLOAD EXAMIANS APP

Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The two different boilers of the same make
The given boiler with the model
Two different makes of boilers operating under the same operating conditions
Any type of boilers operating under any conditions

ANSWER DOWNLOAD EXAMIANS APP