Which shade is commonly used for lens in oxyfuel cutting tasks?

Which shade is commonly used for lens in oxyfuel cutting tasks?

• A. 3
• B. 5
• C. 7
• D. 9

Answer: (B)

Shade levels block different amounts of the flame’s light and radiant energy. For oxyfuel cutting, you’re not dealing with an electric welding arc, but you still need protection from the bright flame and UV/IR while keeping enough visibility to guide the cut. A mid-range shade hits that balance: it provides solid protection without making the view so dark you can’t see the cut line. That’s why it’s the common choice for typical oxyfuel cutting tasks. If the flame were unusually bright or you used different gases or equipment, a darker shade might be needed, but for standard cutting, this middle option is the standard practice.

Shade levels block different amounts of the flame’s light and radiant energy. For oxyfuel cutting, you’re not dealing with an electric welding arc, but you still need protection from the bright flame and UV/IR while keeping enough visibility to guide the cut. A mid-range shade hits that balance: it provides solid protection without making the view so dark you can’t see the cut line. That’s why it’s the common choice for typical oxyfuel cutting tasks. If the flame were unusually bright or you used different gases or equipment, a darker shade might be needed, but for standard cutting, this middle option is the standard practice.