Heat and Mass Transfer
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

Transmissivity
Intensity of radiation
Reflectivity
Emissivity

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
In counter flow heat exchangers

Both the fluids at inlet are in their hottest state
Both the fluids at inlet (of heat exchanger where hot fluid enters) are in their coldest state
One fluid is in hottest state and other in coldest state at inlet
Both the fluids at exit are in their hottest state

ANSWER DOWNLOAD EXAMIANS APP