Answer: A - Superheated vapour refrigerant
The refrigerant supplied to a compressor must be superheated vapour refrigerant.
Solution:
Dry compression of refrigerant is always preferred over wet compression in a compressor because wet compression might result in liquid refrigerant being trapped in the head of the cylinder, potentially damaging the valve. For the above-mentioned reason, the refrigerant supplied to a compressor must be a superheated vapour refrigerant.
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