Refrigeration and Air Conditioning A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be 3.33 2.33 4.33 1.33 3.33 2.33 4.33 1.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The undesirable property of a refrigerant is Non-flammable Non-toxic Non-explosive High boiling point Non-flammable Non-toxic Non-explosive High boiling point ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents Condensation of the refrigerant vapour Evaporation of the refrigerant liquid Compression of the refrigerant vapour Metering of the refrigerant liquid Condensation of the refrigerant vapour Evaporation of the refrigerant liquid Compression of the refrigerant vapour Metering of the refrigerant liquid ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called Saturated air Moist air Specific humidity Dry air Saturated air Moist air Specific humidity Dry air ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Nusselt number (NN) is given by NN = ρ V l /μ NN = V²/t.cp NN = μ cp/k NN = hl/k NN = ρ V l /μ NN = V²/t.cp NN = μ cp/k NN = hl/k ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In mechanical refrigeration system, the refrigerant has the maximum temperature Before expansion valve Between condenser and evaporator In evaporator Between compressor and condenser Before expansion valve Between condenser and evaporator In evaporator Between compressor and condenser ANSWER DOWNLOAD EXAMIANS APP
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