Welder Red Seal · Question
Which of the following activities generates the most intense ultraviolet (UV) radiation and requires the highest level of eye protection?
GMAW, especially when welding highly reflective materials like aluminum at higher amperages, produces the most intense UV radiation and visible light, requiring
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Question: Which of the following activities generates the most intense ultraviolet (UV) radiation and requires the highest level of eye protection?
Answer options:
- Grinding a mild steel plate.
- Shielded Metal Arc Welding (SMAW) at 150 A. ✅ Gas Metal Arc Welding (GMAW) of aluminum at 250 A.
- Oxy-fuel cutting of 10 mm thick steel.
Correct answer: Gas Metal Arc Welding (GMAW) of aluminum at 250 A.
Explanation: GMAW, especially when welding highly reflective materials like aluminum at higher amperages, produces the most intense UV radiation and visible light, requiring a higher shade number for eye protection compared to SMAW at lower amperages, grinding, or oxy-fuel cutting. Intensified UV exposure can lead to arc flash injury to the eyes.
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Question explanations
- A welder is fabricating a pressure vessel component using FCAW-G with an E70T-1 wire. The procedure specifies
- A welder is preparing to weld 20 mm (0.8 in) thick high-strength low-alloy (HSLA) steel using FCAW-G. The weld
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