Practise Certified Industrial Hygienist (CIH) Examination with a short sample and answer explanations. These are independent learning materials, not official exam questions or a pass prediction.

Exam outline and official sources

Board for Global EHS Credentialing (BGC) · CIH Exam Blueprint based on the 2021 Job Analysis, effective April 1, 2022. This is the official blueprint established for this guide as of October 19, 2026; no later effective blueprint was identified. The assigned workbook label matches BGC's Certified Industrial Hygienist credential.

This original 20-question sample covers selected topics across the outline. It does not reproduce official exam questions or cover every tested topic.

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Certified Industrial Hygienist (CIH) Examination

Start with 20 free questions, then review the explanations and any topics you missed.

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A worker's exposure is 60 ppm for 2 hours, 20 ppm for 3 hours, and zero for the remaining 3 hours of an 8-hour shift. What is the 8-hour time-weighted average?

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