Welder Material & Equipment Handling Flashcards
7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Welder Material & Equipment Handling flashcards as text
What is the purpose of preheating base metal before welding high-carbon steel?
Answer: To reduce the risk of hydrogen-induced cracking and hard heat-affected zones
Preheating slows the cooling rate of the weld and HAZ, reducing the risk of hydrogen-induced cracking in high-carbon and alloy steels.
A flux-cored wire electrode (FCAW) requires shielding gas. After welding, the welder notices excessive spatter and a porous weld. What is the most likely cause?
Answer: Shielding gas flow was inadequate or the gas hose was kinked
Inadequate shielding gas coverage allows atmospheric contamination, producing porosity and excessive spatter in FCAW welds.
Which PPE item is specifically required when grinding welds and is often overlooked by welders who already wear a welding helmet?
Answer: A full face shield over safety glasses
A full face shield worn over safety glasses is required for grinding because grinding sparks and fragments travel in all directions unlike a welding arc.
When should the oxygen cylinder valve be opened fully during oxyacetylene welding setup?
Answer: Fully open to prevent leakage past the valve packing
The oxygen cylinder valve must be opened fully to seat the back seal and prevent gas leakage past the valve packing.
What is the danger of using oil or grease on oxygen regulators, fittings, or cylinder valves?
Answer: Oil can ignite violently in the presence of high-pressure oxygen
Petroleum-based lubricants can spontaneously ignite or explode in contact with high-pressure oxygen, creating a serious fire and explosion hazard.
A welder is asked to weld on a part that is coated with an unknown substance. What is the proper first step?
Answer: Identify the coating and determine whether it is safe to weld on or must be removed
Unknown coatings must be identified before welding because some coatings release toxic fumes or affect weld quality and require removal prior to welding.
Which of the following is the correct way to handle a TIG (GTAW) torch when it becomes overheated during welding?
Answer: Allow it to air cool and check the water-cooling lines if equipped
An overheated TIG torch should be allowed to air cool, and water-cooled models require checking the cooling lines for blockage or low coolant flow.