Refrigeration and Air Conditioning In a vapour compression refrigeration system, a throttle valve is used in place of an expander because It improves the C.O.P., as the condenser is small It considerably reduces mass of the system It leads to significant cost reduction The positive work in isentropic expansion of liquid is very small It improves the C.O.P., as the condenser is small It considerably reduces mass of the system It leads to significant cost reduction The positive work in isentropic expansion of liquid is very small ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Refrigeration in aeroplanes usually employs the following refrigerant Air Freon-22 CO2 Freon-11 Air Freon-22 CO2 Freon-11 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Allowable pressure on high pressure side or ammonia absorption system is of the order of 56 bars Atmospheric pressure Slightly above atmospheric pressure 24 bars 56 bars Atmospheric pressure Slightly above atmospheric pressure 24 bars ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Reducing suction pressure in refrigeration cycle 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 All of these ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be 0.2 1.2 5 6 0.2 1.2 5 6 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator. Increase Reduce None of these Equalize Increase Reduce None of these Equalize ANSWER DOWNLOAD EXAMIANS APP
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