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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.5
0.1
0.25
0.75

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Ammonia
Freon
Aqua-ammonia
Water

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Refrigeration and Air Conditioning
In a refrigeration system, heat absorbed in comparison to heat rejected is

More for small capacity and less for high capacity
More
Less
Same

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

Freezing at the expansion valve
All of these
Corrosion of steel plates
Restriction to refrigerant flow

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Refrigeration and Air Conditioning
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Compression
Indirect
Direct
Absorption

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Refrigeration and Air Conditioning
In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

5.12
1
2.15
1.25

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