Refrigeration and Air Conditioning In S.J. unit, one ton of refrigeration is equal to 210 kJ/ min 840 kJ/ min 420 kJ/ min 21 kJ/ min 210 kJ/ min 840 kJ/ min 420 kJ/ min 21 kJ/ min ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The pressure at the inlet of a refrigerant compressor is called Back pressure Critical pressure Suction pressure Discharge pressure Back pressure Critical pressure Suction pressure Discharge pressure ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Superheating in a refrigeration cycle Other factors decide C.O.P O.P remains unaltered Increases C.O.P Decreases C.O.P Other factors decide C.O.P O.P remains unaltered Increases C.O.P Decreases C.O.P ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A one tonne refrigerating machine means that One tonne refrigerant is used One tonne is the total mass of machine One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min One tonne of water can be converted into ice One tonne refrigerant is used One tonne is the total mass of machine One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min One tonne of water can be converted into ice ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Reduce compressor overheating Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor discharge temperature Increase cooling effect Reduce compressor overheating Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor discharge temperature Increase cooling effect ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A thermostatic expansion valve in a refrigeration system None of these Ensures the evaporator completely filled with refrigerant of the load Maintains different temperatures in evaporator in proportion to load Is suitable only for constant load systems None of these Ensures the evaporator completely filled with refrigerant of the load Maintains different temperatures in evaporator in proportion to load Is suitable only for constant load systems ANSWER DOWNLOAD EXAMIANS APP
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