Final answer:
Field tubing should never be flushed with liquid refrigerant due to the risk of damaging the system and creating unsafe working conditions. Proper refrigeration system flushes should be used to avoid compromising the refrigeration cycle or the safety of the operator.
Step-by-step explanation:
You should NEVER flush field tubing with liquid refrigerant. Flushing the field tubing with liquid refrigerant can be dangerous as it may result in damage to the system due to improper oil return or the creation of high-pressure differentials, leading to deformation or bursting of parts. Additionally, liquid refrigerant can upset the balance of the refrigeration cycle, leading to inefficient operation and potential failure.
In the context of the available options, the hermetic compressor and compressor can be subject to damage by contaminants, hence would typically be the components you're trying to protect with the flushing. Electrical arcing is an unrelated phenomenon typically associated with electrical faults, and not a substance with which you would flush a system. Proper flushing involves using designated refrigeration system flushes which are formulated to remove contaminants without damaging the system or presenting risks to the operator.