Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 4
| 1. |
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity) |
| A. |
25°C DBT and 100% RH | | B. |
20°C DBT and 80% RH | | C. |
22°C DBT and 60% RH | | D. |
25°C DBT and 40% RH |
Answer: Option C
Explanation:
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| 2. |
The dry bulb temperature lines, on the psychrometric chart are |
| A. |
vertical and uniformly spaced | | B. |
horizontal and uniformly spaced | | C. |
horizontal and non-uniformly spaced | | D. |
curved lines |
Answer: Option A
Explanation:
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| 3. |
The pressure at the outlet of a refrigerant compressor is called |
| A. |
suction pressure | | B. |
discharge pressure | | C. |
critical pressure | | D. |
back pressure |
Answer: Option B
Explanation:
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| 4. |
A simple air cooling system is good for __________ flight speeds. |
Answer: Option A
Explanation:
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| 5. |
The highest temperature during the cycle in a vapour compression system occurs after evaporation. |
Answer: Option B
Explanation:
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