A device designed to remove moisture from a refrigerant is called
A.Expansion valve
B.Dehumidifier
C.Drier
D.Solenoid
E.Humidstat
Category: Refrigeration and Air conditioning Mcqs
In a vapour absorption system as compared to vapour compression system, the compressor is replaced by
A.Evaporator
B.Receiver
C.Expansion valve
D.Conderser
E.Absorber and generator
No refrigerator using reversed Carnot cycle has been constructed because
A.It is less efficient
B.It requires bulky machines
C.It is uneconomical
D.Isentropic portions of cycle require low speeds whereas isothermal protuons require high speeds
One tonne of refrigeration is equivalent to SI units of
A.1 kW
B.2.5 kW
C.3.5 kW
D.5 kW
E.10 kW
In a newly charged ammonia compression system, the clicking sound in the expansion valve indicates
A.High pressure after compression
B.Excessive ammonia charged
C.Lack of ammonia
D.Evaporator coils chocked
E.Leakage of ammonia
If a refrigerator compressor cuts out on starter overloads the probable reason could be
A.Low line voltage
B.Suction pressure high
C.Discharge pressure high
D.Compressor tight
E.Any of the above
In which part of the vapour compression cycle there is abrupt change in pressure and temperature
A.Solenoid valve
B.Drier
C.Expansion valve
D.Evaporator
E.The change is gradual throughout the cycle
In which section of a vapour compression system, the refrigerant is generally in the form of a wet vapour?
A.Evaporator
B.Expansion valve
C.Compressor
D.Condenser inlet
E.Condenser outlet
When ammonia is the refrigerant, which of the following will be be the material for pipe through which refrigerant flows?
A.Copper
B.Aluminium
C.Brass
D.PVC
E.Cast steel or wrought iron
Oil separator in a refrigeration cycle is installed
A.Before compressor
B.Between compressor and condenser
C.Between condenser and evaporator
D.Between condenser and expansion vlve
E.Could be installed anywhere
