Which of the items listed below is NOT normally used to hold a weld joint to prevent it from warping or changing shape during welding?

The correct item that is not typically used to hold a weld joint to prevent warping or changing shape during welding is slip-joint pliers. Clamps, jigs, and fixtures are specifically designed tools that provide stability and alignment to metal pieces during the welding process. They ensure that the components remain in the correct position, which is critical in avoiding distortion due to heat.

Clamps can hold pieces together tightly and prevent movement during the welding process, making them essential for maintaining the integrity of the weld joint. Jigs are custom-made frameworks that can hold the pieces in a predetermined alignment, especially in repeatable welding applications. Fixtures, similar to jigs, are used to position and support parts, often during more complex welding tasks, allowing for high levels of precision.

In contrast, slip-joint pliers are hand tools primarily used for gripping and turning objects, and while they may be useful in various applications, they do not have the specialized function required for holding weld joints securely during the welding process. Therefore, they are not considered standard equipment for this purpose in welding practices.