Choose the appropriate answer and write the corresponding letter next to Ans . E
ID: 1859321 • Letter: C
Question
Choose the appropriate answer and write the corresponding letter next to Ans. Each question carries one mark.
1) Which of the following statements are TRUE?
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2) Which of the following statements are TRUE?
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3) Which of the following statements are TRUE?
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4) Which of the following statements are TRUE?
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5) A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapor into it, is called
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6) The difference between dry bulb temperature and wet bulb temperature is called
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7) The relative humidity of the air is defined as the ratio of
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8) In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature
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9) 9) The Freon group of refrigerant are
A. A. Halo-carbons refrigerant
B. B. Azeotrop refrigerant
C. C. Inorganic-refrigerant
D. D. Hydro-carbon refrigerant
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10) 10) R-12 generally preferred over R-22 in deep freezers since
A. A. It has lower operating pressure
B. B. It gives high coefficient of performance
C. C. It is miscible with oil over large range of temperatures
D. D. It is immiscible with oil over large range of temperatures
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11) 11) Environmental protection agencies advice against the use of chloro-fluoro-crabon (CFC) refrigerant since
A. A. These react with water vapour and cause acid rain
B. B. These react with plants and cause greenhouse effect
C. C. These react with oxygen and cause its depletion
D. D. These react with ozone layer
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12) 12)The subcooling is a process of cooling the refrigeration in vapour compression refrigeration system
A. A. Before compression
B. B. After compression
C. C. Before throttling
D. D. After throttling
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13) 13) A vapour absorption system
A. A. Gives noisy operation
B. B. Give quiet operation
C. C. Requires little power consumption
D. D. Cools below zero degree
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14) 14) Comparing mechanical vapor compression refrigeration system with absorption refrigeration system, the compressor in the former is replace by in the latter by
A. A. An absorber and a liquid pump
B. B. An absorber, a generator, a liquid pump and a pressure reduction valve
C. C. An absorber, an evaporator, a liquid pump and an expansion valve
D. D. A generator, an evaporator, a liquid pump and an expansion valve
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15) 15) A rectifier is fitted in ammonia absorption plant to
A. A. Superheat ammonia vapour
B. B. Remove the unwanted water vapour by heating the vapour mixture
C. C. Remove the unwanted water vapour by cooling the vapour mixture
D. D, Remove the unwanted water vapour by cooling the vapour mixture and condensing the water vapour
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Explanation / Answer
1) A C
2) B
3)A C D
4)A D
5) BD
6) ABCD
7)A
8) CD
9)D
10) AC
11)BD
12)ABD
13)AC
14)C
15) BC