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55.

Domestic refrigerator working on vapour compression cycle uses the following type of expansion device

A.	electrically operated throttling valve	B.	manually operated valve
C.	thermostatic valve	D.	capillary tube

56.

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

A.	small	B.	high
C.	euqal	D.	anything

57.

Highest temperature encountered in refrigeration cycle should be

A.	near critical temperature of refrigerant	B.	above critical temperature
C.	at critica. temperature	D.	much below critical temperature

58.

In a vapour compression cycle, the refrigerant immediately after expansion valve is

A.	liquid	B.	sub-cooled liquid
C.	saturated liquid	D.	wet vapour

59.

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

60.

In S.J. unit, one ton of refrigeration is equal to

A.	210 kJ/min	B.	21 kJ/min
C.	420 kJ/min	D.	840 kJ/min

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