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 1.33 4.33 2.33 3.33 1.33 4.33 2.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In a bootstrap air evaporative cooling system, the evaporator is provided Between the combustion chamber and the first heat exchanger Between the first heat exchanger and the secondary compressor Between the second heat exchanger and the cooling turbine Between the secondary compressor and the second heat exchanger Between the combustion chamber and the first heat exchanger Between the first heat exchanger and the secondary compressor Between the second heat exchanger and the cooling turbine Between the secondary compressor and the second heat exchanger ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning If a gas is to be liquefied, its temperature must be None of these Increased to a value above its critical temperature Equal to critical temperature Reduced to a value below its critical temperature None of these Increased to a value above its critical temperature Equal to critical temperature Reduced to a value below its critical temperature ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerants has lowest freezing point? NH3 CO2 Freon-12 Freon-22 NH3 CO2 Freon-12 Freon-22 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The thermostatic expansion valve operates on the changes in the Degree of superheat at exit from the evaporator None of these Pressure in the evaporator Temperature of the evaporator Degree of superheat at exit from the evaporator None of these Pressure in the evaporator Temperature of the evaporator ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A refrigerant with the highest critical pressure is R-11 R-12 Ammonia R-22 R-11 R-12 Ammonia R-22 ANSWER DOWNLOAD EXAMIANS APP
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