Welding Module Two Review Questions | Latest Version | 2024/2025 | Correct & Verified

Welding Module Two Review Questions | Latest Version | 2024/2025 | Correct & Verified What is the spark in welding called, and why is it important? It’s the welding arc, and it provides the heat needed to melt the base and filler metals. Why does a welder wear a helmet with a darkened lens? To protect their eyes from harmful UV radiation and bright light from the welding arc. What happens when a weld lacks penetration? The weld is weak and may fail under load because it hasn’t fused properly through the joint thickness. What is the “puddle” in welding? The molten pool of metal created by the heat of the arc during welding. Why do welding rods have a coating, and what does it do? The coating provides shielding, stabilizes the arc, and helps produce slag to protect the weld. 2 How can you tell if a weld is too hot? By observing excessive burn-through, discoloration, or a large weld pool that’s hard to control. What does it mean when the weld "hisses" instead of "buzzes"? It often indicates incorrect shielding gas flow or an unstable arc. Why is post-weld cooling sometimes controlled? To prevent cracking or distortion by managing the cooling rate of the weld and base material. What’s the purpose of weaving the electrode in welding? To create a wider bead and ensure proper fusion along the joint edges. How can you identify a weld with good fusion? The bead smoothly transitions into the base metal without gaps or undercut. 3 What is the “heat-affected zone” in welding? The area of the base metal near the weld that has been altered by the heat of welding. What is spatter, and how can it be minimized? Small droplets of molten metal that fly off during welding, minimized by adjusting the settings and technique. Why does a welder “strike an arc,” and how is it done? To start the welding process, done by lightly tapping or scratching the electrode on the workpiece. What is a welding coupon, and why is it used? A small test piece of metal used to practice or evaluate welding techniques. Why do welders preheat thick metal before welding? To reduce thermal shock and ensure even heating for better weld quality. What is “weld undercut,” and how does it occur? 4 A groove along the weld edge caused by excessive heat or incorrect technique. Why is it important to store welding electrodes in a dry place? To prevent moisture absorption, which can cause hydrogen-induced cracking. What does it mean when a weld is described