REFRIGERATION and AIR CONDITIONING MCQ
31.During a refrigeration cycle, heat is rejected by the refrigerant in a
A. Compressor
B. Condenser
C. Evaporator
D. Expansion valve
32.Freon group of refrigerants are
A. Inflammable
B. Toxic
C. Non-inflammable and toxic
D. Nontoxic and non-inflammable
33.The Freon group of refrigerants are
A. Halocarbon refrigerants
B. Zoetrope refrigerants
C. Inorganic refrigerants
D. Hydrocarbon refrigerants
34.One ton of the refrigeration is
A. The standard unit used in refrigeration problems
B. The cooling effect produced by melting 1 ton of ice
C. The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours
D. The refrigeration effect to produce 1 ton of ice at NTP conditions
35.The power per tonne of refrigeration is
A.3.5/C.O.P.
B.C.O.P/3.5
C.3.5 × C.O.P.
D. None of these
36.An important characteristic of absorption system of refrigeration is
A. noisy operation
B. quiet operation
C. cooling below 0°C
D. very little power consumption
37.The evaporator used in household refrigerators is
A. Frosting evaporator
B. Non-frosting evaporator
C. Defrosting evaporator
D. None of these
38.Chaperon equation is a relation between
A. Temperature, pressure and enthalpy
B. Specific volume and enthalpy
C. Temperature and enthalpy
D. Temperature, pressure, specific volume and enthalpy
39.If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be
A. Same
B. More
C. Less
D. More/less depending on rating
40.In vapour compression cycle, the condition of refrigerant is saturated liquid
A. After passing through the condenser
B. Before passing through the condenser
C. After passing through the expansion throttle valve
D. Before entering the expansion valve
