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 2.33 1.33 3.33 4.33 2.33 1.33 3.33 4.33 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The air cooling system mostly used in transport type aircrafts is Bootstrap air cooling system Simple evaporative air cooling system All of the listed here Simple air cooling system Bootstrap air cooling system Simple evaporative air cooling system All of the listed here Simple air cooling system ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Air refrigeration operates on Rankine’s cycle Carnot cycle Reversed Carnot cycle Brayton cycle Rankine’s cycle Carnot cycle Reversed Carnot cycle Brayton cycle ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In vapour compression cycle, the condition of refrigerant is saturated liquid After passing through the expansion throttle valve After passing through the condenser Before passing through the condenser Before entering the expansion valve After passing through the expansion throttle valve After passing through the condenser Before passing through the condenser Before entering the expansion valve ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg) 125 kJ/kg 100 kJ/kg 50 kJ/kg 25 kJ/kg 125 kJ/kg 100 kJ/kg 50 kJ/kg 25 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In vapour compression refrigeration system, refrigerant occurs as liquid between Condenser and expansion valve Compressor and condenser Compressor and evaporator Expansion valve and evaporator Condenser and expansion valve Compressor and condenser Compressor and evaporator Expansion valve and evaporator ANSWER DOWNLOAD EXAMIANS APP
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