Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 5
46. |
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor. |
Answer: Option A
Explanation:
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47. |
A grey body is one whose absorptivity does not vary with temperature and wave length of the incident ray. |
Answer: Option A
Explanation:
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48. |
The wet bulb temperature during sensible cooling of air |
A. |
remains constant | B. |
increases | C. |
decreases |
Answer: Option C
Explanation:
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49. |
In absorption vapour systems, the refrigerant widely used is R-12. |
Answer: Option B
Explanation:
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50. |
Hydrogen is used in electrolux refrigeration system so as to __________ the rate of evaporation of the liquid ammonia passing through the evaporator. |
A. |
equalise | B. |
reduce | C. |
increase |
Answer: Option C
Explanation:
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