Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Smelling
Using reagents
Halide torch which on detection produces greenish flame lighting
Sulphur sticks which on detection gives white smoke

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Refrigeration and Air Conditioning
The bypass factor of a cooling coil decreases with

Decrease in fin spacing and decrease in number of rows
Increase in fin spacing and decrease in number of rows
Decrease in fin spacing and increase in number of rows
Increase in fin spacing and increase in number of rows

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