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Refrigeration and Air Conditioning

Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________?

Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________?

A. 1.25
B. 0.8
C. 0.5
D. 0.25
E. none of the above

Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________? Read More »

Refrigeration and Air Conditioning

In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?

In vapor compression refrigeration system, refrigerant occurs as liquid between_________________?

A. condenser and expansion valve
B. compressor and evaporator
C. expansion valve and evaporator
D. compressor and condenser
E. none of the above

In vapor compression refrigeration system, refrigerant occurs as liquid between_________________? Read More »

Refrigeration and Air Conditioning

A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be_________________?

A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be_________________?

A. 0.2
B. 1.2
C. 5
D. 6
E. 10

A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. The Cannot coefficient of performance of cycle will be_________________? Read More »

Refrigeration and Air Conditioning

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to___________________?

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to___________________?

A. collect liquid refrigerant and prevent it from going to compressor
B. detect liquid in vapour
C. superheat the vapour
D. collect vapours
E. increase refrigeration effect

In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to___________________? Read More »

Refrigeration and Air Conditioning

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?

A. high, of the order of 25°
B. as low as possible (3 to 11°C)
C. zero
D. any value
E. none of the above

In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________? Read More »

Refrigeration and Air Conditioning

In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?

In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?

A. less than 2 kg
B. more than or equal to 3.65 kg
C. more than 10 kg
D. there is no such consideration
E. pone of the above

In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________? Read More »

Refrigeration and Air Conditioning