The COP of a reversed Carnot cycle is 5. The ratio of highest absolute temperature to the lowest absolute temperature
A.5
B.1.25
C.1.2
D.0.8
E.0.2
Category: Refrigeration and Air conditioning Mcqs
When moisture is added to air at constant dry bulb temperature, the process is known as
A.Humidification
B.Sensible cooling
C.Wetting
D.Chilling
E.None of the above
In case of wet bulb depression is zero, it can be concluded that
A.Rain is likely to occur
B.Storm is likely to hit the place
C.Relative humidity is zero
D.Relative humidity is 100%
E.None of the above
Dischloromono fluoroethane is
A.Freon 11
B.Freon 12
C.Freon 21
D.Freon 22
E.None of the above
At 100% humidity
A.We bulb temperature is same as atmospheric temperature
B.Dry bulb temperature is same as atmospheric temperature
C.Wet bulb temperature is same as dry bulb temperature
D.Wet bulb temperature is exactly half the dry bulb temperature
E.Dry bulb temperature is exactly half the wet bulb temperature
While designing air conditioning system for a theatre the various heat loads are categorized as given below. Which one will give lowest heat load?
A.Direct sun
B.Human beings
C.Lights
D.Outside temperature in summer
Of the following chemicals the liquid having the greatest cooling effect on an individual is
A.Water
B.Brine
C.Ether
D.Water containing ammonium hydroxide
E.Alcohol
Defrosting in a refrigerator may be done by
A.Stopping the compressor for a while
B.Opening the door of refrigerator
C.Placing trays of warm water in the refrigerator
D.Any of the above
E.None of the above
Cryogenics
A.Is same as refrigeration
B.Include heating and cooling of liquids
C.Is a thermodynamic analysis of low temperature systems
D.Is the field of engineering associated with development, production and use of equipment in the range -180?C to absolute zero
E.None of the above
