Which type of welding test strip evaluates the joint quality?

The evaluation of joint quality in welding tests often encompasses various aspects of the weld, which is why the correct answer involves all types mentioned. Each type of welding test strip plays a crucial role in assessing different features of the weld joint.

A side test strip examines the weld from the side view, allowing for the inspection of the width and overall presence of the weld, along with the appearance of the side profiles. This can be crucial for checking for uniformity and consistency.

A face test strip looks at the top or face of the weld bead. This inspection helps assess the finish quality, ensuring that the weld bead has a good appearance and meets the specified dimensions. Imperfections like undercut or excessive convexity can be evaluated through this method.

A root test strip checks the internal portion of the weld at the joint's root. This evaluation is essential for determining the penetration of the weld into the base material and identifying potential issues such as lack of fusion or porosity that could compromise the strength of the joint.

Since each of these test strips assesses different quality factors of the weld joint, the collective evaluation through all these methods provides a comprehensive understanding of the weld's integrity. This holistic approach to testing is why the answer encompasses all options provided.