New York State Asbestos Investigator Practice Exam

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How much air flow does a positive pressure respirator need to provide?

2 CFM
4 CFM
8 CFM
10 CFM

The correct answer is: 4 CFM

A positive pressure respirator needs to provide a consistent airflow to ensure that the wearer is protected from airborne contaminants, particularly in environments where asbestos may be present. The standard airflow requirement for a positive pressure respirator is 4 cubic feet per minute (CFM). This level of airflow is necessary to maintain adequate ventilation within the respirator, keeping the internal environment free of contaminants by creating a positive pressure that prevents outside air from leaking into the mask or hood. This specific airflow rate is crucial for ensuring that the respirator can effectively protect the user by continuously supplying clean air while also allowing for comfortable and safe breathing. Maintaining this minimum airflow is integral to its performance, making it the recognized standard among respiratory protective devices designed for hazardous environments.