CDPH Lead Inspector/Assessor California State Practice Exam

When is wearing a respirator required for employees?

1. Only during breaks

2. When requested by the employer

3. When exposure exceeds the permissible exposure limit

4. Only during training sessions

The correct answer is: When exposure exceeds the permissible exposure limit

Wearing a respirator is required for employees when exposure to hazardous substances exceeds the permissible exposure limit (PEL). The PEL is established to protect workers from harmful levels of airborne contaminants. If monitoring indicates that the concentration of these substances in the air exceeds the established limits, the use of respirators becomes necessary to prevent adverse health effects. This requirement underscores the importance of consistently monitoring workplace conditions for airborne hazards and ensuring that appropriate protective measures, such as respirators, are implemented when necessary. In situations where exposure is above the PEL, relying solely on administrative controls or personal choice would not suffice to ensure the safety and health of employees. Hence, the requirement is a proactive measure to mitigate risks associated with occupational exposure to harmful substances.