Refrigerant 717 is
A.Air
B.Ammonia
C.Carbondioxide
D.Freon 12
E.Freon 22
Category: Refrigeration and Air conditioning Mcqs
In a refrigerator evaporator is located
A.On the bottom of refrigerator cabinet
B.Behind the refrigerator cabinet
C.Adjacent to compressor
D.Inside the refrigerator cabinet
E.On the side of condenser
In a mechanical refrigeration system the highest temperature of refrigerant occurs
A.Between condenser and evaporator
B.In evaporator
C.Before expansion valve
D.Before expansion valve
E.Between compressor and condenser
pH value of a brine solution is
A.70
B.More than
C.Less than 7
D.14
E.Could be any value
When air is adiabatically saturated, the temperature attained is known as
A.Dry bulb temp
B.Wet bulb temp
C.Dew point temp
D.Critical temp
E.Adiabatically sturated temp
For a sensible heating the air is passed over a heating coil which may be
A.Heated by electric resistance
B.Heated by passing hot water through the coil
C.Heated by passing steam through the coil
D.Heated by direct solar radiations
E.Heated by any of the above methods
Dew points temperature is an indication of
A.Moisture content of air
B.Dryness of air
C.Lowest temperature where air and water vapour start separating
D.Condition air
E.Any of the above
In case of completely dry air
A.Total heat is same as latent heat
B.Total heat is same as sensible heat
C.Total heat is sum of sensible heat and latent heat
D.Total heat is sum of sensible heat required for all individual constituents
E.None of the above
If the condensation temperature of a refrigerant is 25?C which type of condenser cannot be used?
A.Air cooled condenser
B.Water cooled condenser
C.Brine circulation condenser
D.Ice cooled condenser
