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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
Specific humidity
Wet bulb temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = μ cp/k
NN = ρ V l /μ
NN = hl/k
NN = V²/t.cp

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Refrigeration and Air Conditioning
The dehumidification process, on the psychrometric chart, is shown by

Vertical line
Curved line
Horizontal line
Inclined line

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Refrigeration and Air Conditioning
In larger industrial and commercial reciprocating compression systems, refrigerant widely used is

Sulphur dioxide
Ammonia
Carbon dioxide
R-12

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

Condensation
Expansion
Evaporation
Compression

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Refrigeration and Air Conditioning
In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to

Detect liquid in vapour
Superheat the vapour
Collect vapours
Collect liquid refrigerant and prevent it from going to compressor

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MORE MCQ ON Refrigeration and Air Conditioning

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