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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The horizontal and non-uniformly spaced lines on a psychrometric chart indicates

Dew point temperature
Dry bulb temperature
Specific humidity
Wet bulb temperature

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

Horizontal and non-uniformly spaced
Curved lines
Vertical and uniformly spaced
Horizontal and uniformly spaced

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Refrigeration and Air Conditioning
The advantage of dry compression is that

It results in high volumetric and mechanical efficiency
All of these
It permits complete evaporation in the evaporator
It permits higher speeds to be used

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Refrigeration and Air Conditioning
A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

Ammonia
Brine
Freon
Carbon dioxide

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

8 bar
15 bar
30 bar
2 bar

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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

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

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MORE MCQ ON Refrigeration and Air Conditioning

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