Refrigeration and Air Conditioning R-12 is generally preferred over R-22 in deep freezers since It is miscible with oil over large range of temperatures It has low operating pressures All of these It gives higher coefficient of performance It is miscible with oil over large range of temperatures It has low operating pressures All of these It gives higher coefficient of performance ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then Refrigerant with lower evaporation temperature should be used Perfectly tight vapour seal should be used Bigger cabinet should be used Smaller cabinet should be used Refrigerant with lower evaporation temperature should be used Perfectly tight vapour seal should be used Bigger cabinet should be used Smaller cabinet should be used ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following is not a desirable property of a refrigerant? Large latent heat Low boiling point Good electrical conductor High risibility with oil Large latent heat Low boiling point Good electrical conductor High risibility with oil ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Wet bulb temperature is the temperature of air recorded by a thermometer, when None of these The moisture present in it begins to condense Its bulb is surrounded by a wet cloth exposed to the air It is not affected by the moisture present in the air None of these The moisture present in it begins to condense Its bulb is surrounded by a wet cloth exposed to the air It is not affected by the moisture present in the air ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system Weak solution to strong solution Ammonia vapours to weak solution Strong solution to ammonia vapour Strong solution to weak solution Weak solution to strong solution Ammonia vapours to weak solution Strong solution to ammonia vapour Strong solution to weak solution ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In larger industrial and commercial reciprocating compression systems, refrigerant widely used is Carbon dioxide R-12 Ammonia Sulphur dioxide Carbon dioxide R-12 Ammonia Sulphur dioxide ANSWER DOWNLOAD EXAMIANS APP
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