If wet bulb temperature is same as dew point, the relative humidity of air will be
A.0
B.25
C.50
D.67
E.100
Category: Refrigeration and Air conditioning Mcqs
If space occupied by the refrigerating plant and cost is the major consideration, which of the following refrigerant will be preferred?
A.Carbondioxide
B.Sulphur dioxide
C.Mehtyl chloride
D.Ammonia
E.Any of the above
In a ammonia vapour compression cycle during gas charging the connection is made
A.Anywhere in the cycle
B.At the compressor cycle
C.At the compressor outlet
D.On low pressure side near evaporat
E.On high pressure side close to receiver
Dehumidification means
A.Removing humidity from a space
B.Reducing the quantity of water vapour in a space
C.Reducing the moisture content of a substance
D.Any of the above
E.None of the above
The change in temperature resulting from a gas expanding from one constant pressure, with no heat transfer and no external work other than to maintain the constant pressure is known as
A.Dalton’s law of partial pressures
B.Law of conservation of energy
C.Kinetic theory of gases
D.Avogadro’s hypothesis
E.Joule – Thomoson effect
When moisture is removed from air at constant dry bulb temperature the process is known as
A.Aeration
B.Deionisation
C.Dehumidification
D.Drying
E.Sensible cooling
Which of the following refrigerant compressor is not classified as positive displacement compressor
A.Reciprocating compressor
B.Centrifugal compressor
C.Rotary compressor
D.Screw compressor
In a vapour absorption refrigeration system the power is required for vapour compressor as compared to that in vapour compression cycle is
A.More
B.Less
C.Half
D.One forth
E.There is no such relation
A water cooler is installed with one ton vapour compression cycle. In 24 hours it will provide
A.0.1 ton of cold water
B.Half ton of cold water
C.One tonne of cold water
D.More than one tonne of cold water
During sensible heating of air
A.Dry bulb temperature increases while enthalpy of moist air decreases
B.Dry bulb temperature decreases while enthalpy of moist air increases
C.Both dry bulb temperature as well as enthalpy decrease
D.Both dry bulb temperature as well as enthalpy increase
