Refrigeration and Air Conditioning R-12 is generally preferred over R-22 in deep freezers since All of these It has low operating pressures It gives higher coefficient of performance It is miscible with oil over large range of temperatures All of these It has low operating pressures It gives higher coefficient of performance It is miscible with oil over large range of temperatures ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by Raising the higher temperature Operating the machine at lower speeds Lowering the higher temperature Operating the machine at higher speeds Raising the higher temperature Operating the machine at lower speeds Lowering the higher temperature Operating the machine at higher speeds ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning If a gas is to be liquefied, its temperature must be Increased to a value above its critical temperature Reduced to a value below its critical temperature None of these Equal to critical temperature Increased to a value above its critical temperature Reduced to a value below its critical temperature None of these Equal to critical temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Air refrigeration cycle is used in Air conditioning Domestic refrigerators Commercial refrigerators Gas liquefaction Air conditioning Domestic refrigerators Commercial refrigerators Gas liquefaction ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One ton refrigeration corresponds to 80 kcal/ hr 50 kcal/ hr 50 kcal/ min 80 kcal/ min 80 kcal/ hr 50 kcal/ hr 50 kcal/ min 80 kcal/ min ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The power per tonne of refrigeration is O.P/3.5 None of these 3.5/C.O.P. 3.5 × C.O.P. O.P/3.5 None of these 3.5/C.O.P. 3.5 × C.O.P. ANSWER DOWNLOAD EXAMIANS APP
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