Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning
Exercise :: Heat Transfer, Refrigeration and Air Conditioning - Section 8
| 11. |
In a domestic refrigerator, a capillary tube controls the flow of refrigerant from the |
| A. |
expansion valve to the evaporator | | B. |
evaporator to the thermostat | | C. |
condenser to the expansion valve | | D. |
condenser to the evaporator |
Answer: Option D
Explanation:
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| 12. |
The absolute humidity is the mass of water vapour present in 1 m3 of dry air. |
Answer: Option A
Explanation:
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| 13. |
In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by |
| A. |
liquid pump | | B. |
generator | | C. |
absorber and generator | | D. |
absorber, generator and liquid pump |
Answer: Option D
Explanation:
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| 14. |
The refrigerant used in small-tonnage commercial machines (hermetically sealed units) is |
| A. |
ammonia | | B. |
carbon dioxide | | C. |
sulphur dioxide | | D. |
R-12 |
Answer: Option C
Explanation:
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| 15. |
In a lithium bromide absorption refrigeration system |
| A. |
lithium bromide is used as a refrigerant and water as an absorbent | | B. |
water is used as a refrigerant and lithium bromide as an absorbent | | C. |
ammonia is used as a refrigerant and lithium bromide as an absorbent | | D. |
none of the above |
Answer: Option B
Explanation:
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