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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-flammable
Non-toxic
Non-explosive
High boiling point

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

None of these
Dry
Flooded
DX coil

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Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Cooling and dehumidification
Dehumidification
Humidification
Heating and humidification

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Refrigeration and Air Conditioning
The optimum effective temperature for human comfort is

Same in winter and summer
Not dependent on season
Lower in winter than in summer
Higher in winter than in summer

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

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

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

1.2
6
0.2
5

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