OSHA 10-Hour Construction ReviewHealth Hazards in ConstructionEasy
A construction worker is exposed to noise levels repeatedly exceeding 90 dBA over an 8-hour workday without hearing protection. According to OSHA, what is the maximum permissible exposure limit (PEL) for noise averaged over an 8-hour workday?
- A85 dBA
- B95 dBA
- C90 dBA
- D80 dBA
Show answer & explanationAnswer & explanation
Correct answer: C. 90 dBA
OSHA's Permissible Exposure Limit (PEL) for noise is 90 dBA averaged over an 8-hour workday. Exposure above this level requires engineering controls, administrative controls, or hearing protection.
Why the other options are wrong
- A. 85 dBA is the Action Level, requiring a hearing conservation program, but not the PEL.
- B. 95 dBA exceeds the PEL and requires immediate protective measures.
- D. 80 dBA is below the PEL and action level.
OSHA Noise PEL (8-hour TWA)
The maximum permissible exposure limit for noise, averaged over an 8-hour workday, set by OSHA at 90 dBA.
- PEL stands for Permissible Exposure Limit.
- Time-Weighted Average (TWA) over 8 hours.
- Exceeding 90 dBA requires protective actions.
Memory trick: Action at '85', Protection at '90'.