The ratio of water vapour to the mass of dry air in a given mixture is known as
A.Humidity ratio
B.Relative humidity
C.Degree of saturation
D.Any of the above
E.None of the above
Category: Refrigeration and Air conditioning Mcqs
A low wet bulb temperature indicates
A.Very cool air
B.Very low humidity
C.Very low atmospheric temperature
D.(A) and (B) above
E.(A) and (C) above
In a domestic refrigerator if the compressor runs continuously, it shows that
A.The system is working perfectly all right
B.The refrigeration is to full capacity
C.The system is overloaded
D.Any of the above
E.None of the above
Water is used as a refrigerant in
A.Vapour absorption cycle
B.Steam jet refrigeration
C.Vapour absorption cycle
D.Cascade system
E.None of the above
In central air conditioning system
A.Entire equipment is placed in the air conditioned space
B.There is only one machine which performs the function of air conditioning
C.All the major equipment is located in one central space removed from the air to be conditioned
D.Is used when small area is to be air conditioned
E.None of the above
If the suction pressure of a refrigeration compressor is too high, it shows
A.Lack of refrigerant on cycle
B.Excessive load and evaporator
C.Negligible load on evaporator
D.Any of above
E.None of the above
Two thermometers are constructed in the same way except that one has a spherical bulb and the other an elongated cylindrical bulb. Which one will respond quickly to temperature change?
A.Spherical bulb thermometer
B.Cylindrical bulb thermometer
C.Both will respond in identical manner
D.Cannot be ascertained on the basis of information provided
A Bell-Coleman cycle is
A.Reversed Carnot cycle
B.Reversed Joule cycle
C.Reversed Otto cycle
D.Reversed Rankine cycle
E.Reversed Sterling cycle
The rate of evaporation of water will be low when
A.Reactive humidity is zero
B.Relative humidity is less than 50%
C.Relative humidity is high
D.Rate of evaporation does not depend on relative humidity
In a refrigeration system a condenser
A.Receives liquid refrigerant and supplies liquid refrigerant
B.Receives vapour refrigerant and supplies vapour refrigerant
C.Receives vapour refrigerant and supplies liquid refrigerant
D.Receives liquid refrigerant and supplies liquid refrigerant
E.None of the above
