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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

DX coil
Dry
Flooded
None of these

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Carbon dioxide
R-12
Sulphur dioxide
Ammonia

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Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Evaporator
Absorber
Condenser
Condenser, absorber and separator (rectifier)

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Automatic expansion valve
High side float valve
Low side float valve
Thermostatic expansion valve

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Evaporation
Expansion
Compression
Condensation

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

Water will never evaporate
A gas will never liquefy
A gas will immediately liquefy
Water will evaporate

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