The vapor pressure of refrigerant should be_________________?

A. Lower than atmospheric pressure
B. Higher than atmospheric pressure
C. Equal to atmospheric pressure
D. Could be anything

Critical pressure of a liquid is the pressure_________________?

A. Above which liquid will remain liquid
B. Above which liquid becomes gas
C. Above which liquid becomes vapour
D. Above which liquid becomes solid

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

The value of COP in vapour compression cycle is usually__________________?

A. Always less than unity
B. Always more than unity
C. Equal to unity
D. Any one of the above

Condensing temperature in a refrigerator is the temperature_________________?

A. Of cooling medium
B. Of freezing zone
C. Of evaporator
D. At which refrigerant gas becomes liquid

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

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

Accumulators should have adequate volume to store refrigerant charge at least_________________?

A. 10%
B. 25%
C. 50%
D. 75%

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

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