A Best Way To Crack Gorenment Job Exams

Mechanical Engineering Objective Questions { Refrigeration and AC }



50. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm2 gauge and condensing pressure of about 67 kg/cm2. The refrigerant used is
A.Ammonia
B.Carbon dioxide
C.Freon
D.Brine

51. Aqua anunonia is used as refrigerant in the following type of refrigeration system (a) compression (b) direct
A.(c) indirect
B.(d) absorption
C.(e) none of the above
D.7.60. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

52. 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

53. In a refrigeration cycle, the flow of refrigerant is controlled by
A.Compressor
B.Condenser
C.Evaporator
D.Expansion valve

54. Where does the lowest temperature occur in a vapour compression cycle ?
A.Condenser
B.Evaporator
C.Compressor
D.Expansion valve

55. The leaks in a refrigeration system using Freon are detected by
A.Halide torch which on detection produces greenish flame lighting
B.Sulphur sticks which on detection gives white smoke
C.Using reagents
D.Smelling

56. rick up the incorrect statement
A.Lithium bromide used in vapour absorption cycle is nonvolatile
B.Lithium bromide plant can't operate below 0?C
C.A separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
D.Concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator

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