Which of the following is important to check after removing slag from a weld?

After removing slag from a weld, one of the most critical aspects to check is for the presence of any cracks. Cracks can significantly compromise the integrity and durability of the weld joint, potentially leading to failure during service. Inspecting for cracks allows the welder to identify any defects that may have developed during the cooling process or as a result of improper welding parameters. This is crucial in ensuring that the weld meets the required standards and can withstand the intended loads and stresses.

While assessing the color of the weld can provide some indication of the quality and heat affected zone, it doesn't offer a definitive insight into structural integrity, which is why checking for cracks is prioritized. The amount of smoke emitted during welding may relate to the welding process and materials used but does not provide relevant post-weld integrity information. Similarly, checking the temperature of the weld is not pertinent after slag removal, as the weld should already be cooling down at that stage. Thus, focusing on the presence of cracks is essential for verifying the quality and safety of the weld.