Refrigeration and Air Conditioning A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 2.33 4.33 3.33 1.33 2.33 4.33 3.33 1.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The reciprocating refrigerant compressors are very suitable for Large displacements and high condensing pressures Small displacements and low condensing pressures Small displacements and high condensing pressures Large displacements and low condensing pressures Large displacements and high condensing pressures Small displacements and low condensing pressures Small displacements and high condensing pressures Large displacements and low condensing pressures ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The wet bulb temperature at 100% relative humidity is ________ dew point temperature. Higher than Lower than None of these Same as Higher than Lower than None of these Same as ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The domestic refrigerator uses following type of compressor Centrifugal Miniature sealed unit Piston type reciprocating Axial Centrifugal Miniature sealed unit Piston type reciprocating Axial ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Ensure that only liquid and not the vapour enters the expansion (throttling) valve Increase cooling effect Reduce compressor overheating Reduce compressor discharge temperature Ensure that only liquid and not the vapour enters the expansion (throttling) valve Increase cooling effect Reduce compressor overheating Reduce compressor discharge temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle? 0.5 1.25 0.8 0.25 0.5 1.25 0.8 0.25 ANSWER DOWNLOAD EXAMIANS APP
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