A welding helmet will be able to remove 99.5% of infrared rays and 99.75% of ultraviolet rays.

Prepare for the California Welding Contractor Exam (C-60 License) with flashcards and multiple choice questions, each including hints and explanations. Get exam-ready!

Multiple Choice

A welding helmet will be able to remove 99.5% of infrared rays and 99.75% of ultraviolet rays.

Explanation:
Welding helmet protection is described by how much radiant energy it blocks in different bands. If a helmet removes 99.5% of infrared rays and 99.75% of ultraviolet rays, it means only a tiny fraction of each type gets through: 0.5% of infrared and 0.25% of ultraviolet. The matching statement is the one that lists exactly those two values: 99.5% infrared and 99.75% ultraviolet. That is the best choice because it aligns with the helmet’s stated performance. Other options give different protection levels or swap the values, which would not reflect the helmet’s actual filtering. With such high blocking percentages, the risk to eyes and skin from welding light is greatly reduced.

Welding helmet protection is described by how much radiant energy it blocks in different bands. If a helmet removes 99.5% of infrared rays and 99.75% of ultraviolet rays, it means only a tiny fraction of each type gets through: 0.5% of infrared and 0.25% of ultraviolet.

The matching statement is the one that lists exactly those two values: 99.5% infrared and 99.75% ultraviolet. That is the best choice because it aligns with the helmet’s stated performance.

Other options give different protection levels or swap the values, which would not reflect the helmet’s actual filtering. With such high blocking percentages, the risk to eyes and skin from welding light is greatly reduced.

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