What is the maximum opening size allowed in a fan guard?

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Prepare for the OSHA 501 Industry Trainer Test. Review with flashcards and multiple-choice questions, each with hints and explanations. Ace your exam!

Multiple Choice

What is the maximum opening size allowed in a fan guard?

Explanation:
Openings in a fan guard must be small enough to prevent a hand or fingers from reaching through to the moving blades. The practical test used is that a 1/2‑inch diameter sphere should not be able to pass through any opening. This means the openings must be no larger than half an inch. Larger openings would allow fingers or small objects to reach in and contact the blades, increasing injury risk. So the maximum opening size allowed is one-half inch.

Openings in a fan guard must be small enough to prevent a hand or fingers from reaching through to the moving blades. The practical test used is that a 1/2‑inch diameter sphere should not be able to pass through any opening. This means the openings must be no larger than half an inch. Larger openings would allow fingers or small objects to reach in and contact the blades, increasing injury risk. So the maximum opening size allowed is one-half inch.

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