Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 1
| 46. |
The critical radius is the insulation radius at which the resistance to heat flow is |
| A. |
maximum | | B. |
minimum | | C. |
zero | | D. |
none of these |
Answer: Option B
Explanation:
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| 47. |
In case of solids, the heat transfer takes place according to radiation. |
Answer: Option B
Explanation:
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| 48. |
A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser. |
Answer: Option B
Explanation:
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| 49. |
The relative humidity decreases as air gets wet. |
Answer: Option A
Explanation:
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| 50. |
The temperature of ammonia after compression in a vapour compression system is |
| A. |
20 to 50° C | | B. |
50 to 70° C | | C. |
70 to 110° C | | D. |
none of these |
Answer: Option C
Explanation:
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