Swaging of copper tube is done for joining __________.

The correct answer for swaging of copper tube is: 4) a tube of the same diameter as the copper tube

Concept:

• Swaging involves expanding the end of a copper tube to create a slightly larger diameter that can fit over another tube of the same original diameter.
• This creates a mechanical joint without the need for additional fittings like couplings or soldering.
• The swaged end typically creates a snug fit against the other tube, enhancing the joint's strength and leak resistance.
• Therefore, swaging is primarily used for joining pipes of the same diameter for a quick and efficient connection.

Here's a short explanation of the other options:

1) the stud: Studs are threaded rods used for different purposes in plumbing but are not directly linked to swaging copper tubes.
2) the flaring nut: Flaring involves creating a cone-shaped edge on the tube for connecting with a compression fitting, not expanding the entire end like swaging.
3) a dissimilar diameter tube: While swaging can technically be used to create a transition between tubes of slightly different diameters, it's not the primary or optimal application. In such cases, specialized fittings or other joining methods might be more suitable.