Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 3
| 31. |
The sensible heat during humidification process decreases. |
Answer: Option B
Explanation:
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| 32. |
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is |
| A. |
directly proportional to the surface area | | B. |
directly proportional to the difference of temperatures between the two bodies | | C. |
either (a) or (b) | | D. |
both (a) and (b) |
Answer: Option D
Explanation:
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| 33. |
The freezing point of carbon dioxide is equal to boiling point of R-12. |
Answer: Option B
Explanation:
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| 34. |
The condition of refrigerant as it leaves the compressor in a vapour compression system is |
| A. |
saturated liquid | | B. |
wet vapour | | C. |
dry saturated vapour | | D. |
superheated vapour |
Answer: Option D
Explanation:
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| 35. |
The super-heating in a refrigeration cycle |
| A. |
does not alter C.O.P. | | B. |
increases C.O.P. | | C. |
decreases C.O.P. | | D. |
none of these |
Answer: Option C
Explanation:
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