OSHA Module 27, Section 2: Air
Monitoring & Medical Surveillance
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is air monitoring in the workplace?
✔✔ Air monitoring is the process of measuring airborne contaminants to ensure worker safety
and compliance with OSHA regulations.
Why is air monitoring important for worker safety?
✔✔ It helps detect hazardous substances in the air, ensuring exposure levels stay within safe
limits.
Who is responsible for conducting workplace air monitoring?
✔✔ Employers must arrange air monitoring, often performed by industrial hygienists or trained
safety personnel.
When should air monitoring be conducted?
✔✔ It should be done when hazardous substances are present, after process changes, and during
high-risk tasks.
1
, What is the purpose of personal air sampling?
✔✔ Personal air sampling measures an individual worker’s exposure to airborne contaminants.
How is area air sampling different from personal air sampling?
✔✔ Area air sampling measures airborne hazards in a general work area rather than focusing on
an individual worker’s exposure.
What is a time-weighted average (TWA) in air monitoring?
✔✔ A TWA is the average concentration of a hazardous substance over a specific work period,
usually eight hours.
Why does OSHA require exposure limits for airborne hazards?
✔✔ To protect workers from long-term health effects caused by exposure to hazardous
substances.
What is the permissible exposure limit (PEL)?
✔✔ The PEL is the maximum amount of a hazardous substance a worker can be exposed to over
a set time without adverse health effects.
2
Monitoring & Medical Surveillance
Questions and Answers | Latest Version
| 2024/2025 | Correct & Verified
What is air monitoring in the workplace?
✔✔ Air monitoring is the process of measuring airborne contaminants to ensure worker safety
and compliance with OSHA regulations.
Why is air monitoring important for worker safety?
✔✔ It helps detect hazardous substances in the air, ensuring exposure levels stay within safe
limits.
Who is responsible for conducting workplace air monitoring?
✔✔ Employers must arrange air monitoring, often performed by industrial hygienists or trained
safety personnel.
When should air monitoring be conducted?
✔✔ It should be done when hazardous substances are present, after process changes, and during
high-risk tasks.
1
, What is the purpose of personal air sampling?
✔✔ Personal air sampling measures an individual worker’s exposure to airborne contaminants.
How is area air sampling different from personal air sampling?
✔✔ Area air sampling measures airborne hazards in a general work area rather than focusing on
an individual worker’s exposure.
What is a time-weighted average (TWA) in air monitoring?
✔✔ A TWA is the average concentration of a hazardous substance over a specific work period,
usually eight hours.
Why does OSHA require exposure limits for airborne hazards?
✔✔ To protect workers from long-term health effects caused by exposure to hazardous
substances.
What is the permissible exposure limit (PEL)?
✔✔ The PEL is the maximum amount of a hazardous substance a worker can be exposed to over
a set time without adverse health effects.
2
