Hard drawn copper tubing should not be bent.

• A. Welded
• B. Bent
• C. Soldered
• D. Crimped

Answer: (B)

Hard drawn copper tubing is work-hardened and very rigid, so it has limited ductility. Bending it places high local stresses at the bend, which can cause wall thinning, kinking, or cracks and lead to leaks. Because of that, bending hard drawn copper is not recommended; instead, use soft copper for bends or connect with elbows and fittings to change direction. The key idea is that bending should be avoided for this type of tubing, which is why the correct choice identifies bending as something that should not be done. The other options describe joining methods rather than changing the tube’s direction.