1. During a refrigeration cycle, heat is rejected by the refrigerant in a
- Compressor
- Condenser
- Evaporator
- Expansion valve
2. In a vapour compression system, the condition of refrigerant before entering the compressor is
- Saturated liquid
- Wet vapour
- Dry saturated liquid
- Superheated vapour
3. The highest temperature during the cycle, in a vapour compression system, occurs after
- Compression
- Condensation
- Expansion
- Evaporation
4. In
a vapour compression system, the lowest temperature during the cycles occurs after
- Compression
- Condensation
- Expansion
- Evaporation
5. The sub-cooling in a refrigeration cycle
- Does not alter C.O.P
- Increases C.O.P
- Decreases C.O.P
6. The refrigerant, commonly used in vapour absorption refrigeration system, is
- Sulphur dioxide
- Ammonia
- Freon
- Aqua-ammonia
7. In ammonia-hydrogen refrigerator
- Ammonia is absorbed in hydrogen
- Ammonia is absorbed in water
- Ammonia evaporates in hydrogen
- Hydrogen evaporates in ammonia
8. Which of the following refrigerants has the lowest boiling point?
- Ammonia
- Carbon dioxide
- Sulphur dioxide
- Freon-12
9. Which of the following refrigerant is highly toxic and flammable?
- Ammonia
- Carbon dioxide
- Sulphur dioxide
- Freon-12
:: See Also::
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