Refrigeration and Air Conditioning The emissivity of a polished silver body is ____ as compared to black body. Very low Low High Same Very low Low High Same ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Formation of frost on evaporator in refrigerator Increases heat transfer rate Is immaterial Can be avoided by proper design Results in loss of heat due to poor heat transfer Increases heat transfer rate Is immaterial Can be avoided by proper design Results in loss of heat due to poor heat transfer ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, Will remain unaffected Will be lower Will be higher May be higher or lower depending upon the nature of non-condensable gases Will remain unaffected Will be lower Will be higher May be higher or lower depending upon the nature of non-condensable gases ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called Humidity ratio Degree of saturation Relative humidity Absolute humidity Humidity ratio Degree of saturation Relative humidity Absolute humidity ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One ton refrigeration corresponds to 80 kcal/ min 80 kcal/ hr 50 kcal/ hr 50 kcal/ min 80 kcal/ min 80 kcal/ hr 50 kcal/ hr 50 kcal/ min ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following statement is wrong? The value of C.O.P. is always greater than one The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour None of the listed here The value of C.O.P. is always greater than one The space between the saturated liquid line and saturated vapour line, in a pressure enthalpy chart, is wet vapour region In a vapour compression system, the condition of refrigerant before entering the compressor is dry saturated vapour None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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