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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
None of the listed here
Greater than
Equal to

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Refrigeration and Air Conditioning
The curved lines on a psychrometric chart indicates

Dew point temperature
Dry bulb temperature
Wet bulb temperature
Relative humidity

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

Large latent heat
Good electrical conductor
Low boiling point
High risibility with oil

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

Absorption
Indirect
Compression
Direct

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

Decreases C.O.P
O.P remains unaltered
Other factors decide C.O.P
Increases C.O.P

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

very little power consumption
cooling below 0°C
noisy operation
quiet operation

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