Which of the following tools and materials are NOT suitable for cleaning copper tubing before soldering?

A. a file
B. emery cloth
C. abrasive pads
D. steel wool



Answer :

Final answer:

A file, steel wool, and abrasive pads are not suitable for cleaning copper tubing before soldering due to the risk of surface damage.


Explanation:

A file, steel wool, and abrasive pads are NOT suitable for cleaning copper tubing before soldering. They can scratch or damage the surface of the copper, resulting in poor solder joints. The recommended materials for cleaning copper tubing are emery cloth or a dedicated cleaning brush to ensure a clean surface for effective soldering.


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