Refrigeration and Air Conditioning The refrigerant used in small tonnage commercial machines (hermetically sealed units) is Sulphur dioxide R-12 Carbon dioxide Ammonia Sulphur dioxide R-12 Carbon dioxide Ammonia ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One ton refrigeration corresponds to 80 kcal/ hr 50 kcal/ min 80 kcal/ min 50 kcal/ hr 80 kcal/ hr 50 kcal/ min 80 kcal/ min 50 kcal/ hr ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is Reversed Joule cycle Reversed Carnot cycle Reversed Otto cycle Reversed Brayton cycle Reversed Joule cycle Reversed Carnot cycle Reversed Otto cycle Reversed Brayton cycle ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The value of C.O.P in vapour compression cycle is usually Equal to unity Always less than unity Any one of the above Always more than unity Equal to unity Always less than unity Any one of the above Always more than unity ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle All of these Increases power required per ton of refrigeration Lowers compressor capacity because vapour is lighter Lowers evaporation temperature All of these Increases power required per ton of refrigeration Lowers compressor capacity because vapour is lighter Lowers evaporation temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow. None of these Greater than Less than Equal to None of these Greater than Less than Equal to ANSWER DOWNLOAD EXAMIANS APP
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