Construction Health and Safety Technician (CHST) Practice Test 2026 – All-in-One Study Guide for Exam Success!

A noise-hazard control program is mandated under OSHA regulation 29 CFR 1910 when noise exposure exceeds 85 decibels (dB) over an eight-hour time-weighted average. This regulation is in place because prolonged exposure to noise levels at or above this threshold can lead to significant hearing loss and other health issues for workers.

The regulation recognizes that sound levels above 85 dB can cause auditory fatigue and permanent hearing damage if no controls are implemented. Employers are required to measure noise levels, provide hearing conservation programs, and take necessary actions such as using quieter equipment, implementing engineering controls, or providing personal protective equipment to mitigate exposure.

The other options, while reflecting noise levels that can also impact health, do not establish the threshold at which a formal program becomes necessary according to OSHA guidelines. Therefore, the requirement for a noise-hazard control program rests specifically at the 85 dB level to protect worker health effectively.