Which percent of infrared rays does a welding helmet remove?

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

Which percent of infrared rays does a welding helmet remove?

Explanation:
The main idea is that a welding helmet blocks almost all of the infrared radiation produced by the arc to protect your eyes from heat damage. The filter in a helmet is designed to absorb and reflect the infrared and also ultraviolet light, while still letting enough visible light through so you can see the weld. That combination typically results in about 99.5% of infrared rays being removed, which is why this option is the standard teaching value. The other percentages would let through too much infrared energy, increasing the risk of eye injury.

The main idea is that a welding helmet blocks almost all of the infrared radiation produced by the arc to protect your eyes from heat damage. The filter in a helmet is designed to absorb and reflect the infrared and also ultraviolet light, while still letting enough visible light through so you can see the weld. That combination typically results in about 99.5% of infrared rays being removed, which is why this option is the standard teaching value. The other percentages would let through too much infrared energy, increasing the risk of eye injury.

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