Refrigeration and Air Conditioning If a gas is to be liquefied, its temperature must be None of these Reduced to a value below its critical temperature Equal to critical temperature Increased to a value above its critical temperature None of these Reduced to a value below its critical temperature Equal to critical temperature Increased to a value above its critical temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In vapour compression refrigeration system, refrigerant occurs as liquid between Expansion valve and evaporator Compressor and evaporator Compressor and condenser Condenser and expansion valve Expansion valve and evaporator Compressor and evaporator Compressor and condenser Condenser and expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning One of the purposes of sub cooling the liquid refrigerant is to Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor overheating Increase cooling effect Reduce compressor discharge temperature Ensure that only liquid and not the vapour enters the expansion (throttling) valve Reduce compressor overheating Increase cooling effect Reduce compressor discharge temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The boiling point of ammonia is -10.5°C -30°C -33.3°C -77.7°C -10.5°C -30°C -33.3°C -77.7°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by O.P.)P = ( O.P)R O.P)P = ( O.P.)R + 1 O.P.)R + 2 ( O.P)R - 1 O.P.)P = ( ( O.P)P = ( ( ( O.P.)P = ( O.P)R O.P)P = ( O.P.)R + 1 O.P.)R + 2 ( O.P)R - 1 O.P.)P = ( ( O.P)P = ( ( ( ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerant has the lowest freezing point? Ammonia R-22 R-12 R-11 Ammonia R-22 R-12 R-11 ANSWER DOWNLOAD EXAMIANS APP
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