Refrigeration and air-conditioning objective questions and answers
6. Air refrigeration cycle is used in.......
A.Commercial refrigerators
B.Domestic refrigerators
C.Air-conditioning
D.Gas liquefaction
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D.Gas liquefaction
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7. The refrigeran,commonly used in vapour absorption refrigeration systems,is.......
A.Sulphur dioxide
B.Ammonia
C.Freon
D.Aqua-ammonia
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8. The boiling point of ammonia is
A.-10.50C
B.-30.50C
C.-33.30C
C.-77.60C
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9. Which of the following refrigerant has the lowest boiling point?.......
A.Ammonia
B.Carbon dioxide
C.Sulphur dioxide
D.Freon-12
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10. Which of the following refrigerant is highly toxic and flammable.......
A.Ammonia
B.Carbon dioxide
C.Sulphur dioxide
D.Freon-12
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