Refrigeration and Air Conditioning The refrigerant used in small tonnage commercial machines (hermetically sealed units) is Sulphur dioxide Ammonia Carbon dioxide R-12 Sulphur dioxide Ammonia Carbon dioxide R-12 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Under cooling in a refrigeration cycle Other factors decide C.O.P O.P remains unaltered Decreases C.O.P Increases C.O.P Other factors decide C.O.P O.P remains unaltered Decreases C.O.P Increases C.O.P ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as Mean radiant temperature Effective temperature Dew point temperature None of the listed here Mean radiant temperature Effective temperature Dew point temperature None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Moisture in Freon refrigeration system causes Freezing automatic regulating valve High power consumption Ineffective refrigeration Corrosion of whole system Freezing automatic regulating valve High power consumption Ineffective refrigeration Corrosion of whole system ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In mechanical refrigeration system, the refrigerant has the maximum temperature Between condenser and evaporator Between compressor and condenser In evaporator Before expansion valve Between condenser and evaporator Between compressor and condenser In evaporator Before expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration 0.1 to 0.5 h.p. per ton of refrigeration 0.5 to 0.8 h.p. per ton of refrigeration 1 to 2 h.p. per ton of refrigeration 2 to 5 h.p. per ton of refrigeration 0.1 to 0.5 h.p. per ton of refrigeration 0.5 to 0.8 h.p. per ton of refrigeration 1 to 2 h.p. per ton of refrigeration 2 to 5 h.p. per ton of refrigeration ANSWER DOWNLOAD EXAMIANS APP
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