Refrigeration And Air Conditioning question and answer for competitive exams
11. In a refrigeration cycle, oil separator is installed between
(A) Condenser and expansion value
(B) Compressor and condenser
(C) Condenser and evaporator
(D) None of the above
12. In a small refrigerator a capillary tube is used to serve the purpose of
(A) Evaporator
(B) Thermostat
(C) Condenser
(D) Expansion value
13. A device designed to remove moisture form a refrigerant is called
(A) Dehumidifier
(B) Solenoid
(C) Expansion
(D) Drier
14. At the back of domestic refrigerator, the bank of tubes are
(A) Evaporator tubes
(B) Condenser tubes
(C) Refrigerant cooling tubes
(D) Capillary tubes
15. Which refrigerant is used in a vapour absorption refrigerant?
(A) Freon
(B) Sulphur dioxide
(C) Water
(D) Aqua-ammonia
16. Which of the following components is common between vapour compression and vapour absorption systems?
(A) Rectifier
(B) Condenser
(C) Generator
(D) Absorber
17. In a vapour compression system, the temperature of ammonia after compression is in the range
(A) 15 to 25C
(B) 25 to 50C
(C) 50 to 70C
(D) 70 to 110C
18. Accumulators should have adequate volume to store refrigerant charge at least ……….of refrigerant charge.
(A) 5 percent
(B) 30 percent
(C) 50 percent
(D) 70 percent
19. Ammonia is –
(A) Non-inflammable
(B) Non-toxic
(C) Toxic and non-inflammable
(D) Highly toxic and inflammable
20. The material of pipelines for a system using Freon as refrigerant should be
(A) Aluminium
(B) Copper
(C) Steel
(D) Brass
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