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 4.33 1.33 2.33 3.33 4.33 1.33 2.33 3.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following statement is correct for ammonia as a refrigerant? It reacts with copper and its alloys. All of these It requires large displacement per TR compared to fluoro carbons. It is toxic to mucous membranes. It reacts with copper and its alloys. All of these It requires large displacement per TR compared to fluoro carbons. It is toxic to mucous membranes. ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Increases heat transfer rate Results in loss of heat due to poor heat transfer Can be avoided by proper design Is immaterial Increases heat transfer rate Results in loss of heat due to poor heat transfer Can be avoided by proper design Is immaterial ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Critical temperature is the temperature above which Water will never evaporate A gas will never liquefy A gas will immediately liquefy Water will evaporate Water will never evaporate A gas will never liquefy A gas will immediately liquefy Water will evaporate ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process Takes place at constant temperature Takes place at constant entropy Takes place at constant pressure Involves no change in volume Takes place at constant temperature Takes place at constant entropy Takes place at constant pressure Involves no change in volume ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Rating of a domestic refrigerator is of the order of 40 tons 10 tons 0.1 ton 5 tons 40 tons 10 tons 0.1 ton 5 tons ANSWER DOWNLOAD EXAMIANS APP
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