Refrigeration and Air Conditioning The heat rejection factor (HRF) is given by 1 + C.O.P 1 - (1/C.O.P) 1 + (1/C.O.P) 1 - C.O.P. 1 + C.O.P 1 - (1/C.O.P) 1 + (1/C.O.P) 1 - C.O.P. 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 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 Raising the higher temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The refrigerant supplied to a compressor must be A mixture of liquid and vapour refrigerant Superheated vapour refrigerant Dry saturated liquid refrigerant None of these A mixture of liquid and vapour refrigerant Superheated vapour refrigerant Dry saturated liquid refrigerant None of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The difference between dry bulb temperature and dew point temperature, is called Dry bulb depression Dew point depression Degree of saturation Wet bulb depression Dry bulb depression Dew point depression Degree of saturation Wet bulb depression ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to Detect liquid in vapour Collect liquid refrigerant and prevent it from going to compressor Superheat the vapour Collect vapours Detect liquid in vapour Collect liquid refrigerant and prevent it from going to compressor Superheat the vapour Collect vapours ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The thermostatic expansion valve operates on the changes in the Temperature of the evaporator None of these Pressure in the evaporator Degree of superheat at exit from the evaporator Temperature of the evaporator None of these Pressure in the evaporator Degree of superheat at exit from the evaporator ANSWER DOWNLOAD EXAMIANS APP
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