HEPA filtration can protect against which hazard?

HEPA filtration can protect against which hazard?

• A. Oxygen deficiency
• B. Gases and vapors
• C. Airborne pathogens
• D. Heat stress

Answer: (C)

HEPA filtration works by trapping very small particles as air passes through a fine filter, using diffusion, interception, and impaction to remove dust, pollen, smoke particulates, and bioaerosols. Because many pathogens travel in tiny droplets or attach to particles in the air, HEPA filtration can reduce inhalation exposure to airborne pathogens when used in respirators or air-cleaning systems. Gases and vapors aren’t removed by a standard HEPA filter, since they’re chemical substances rather than particulates. Oxygen deficiency and heat stress aren’t addressed by filtration alone either—those require different controls like breathable air or cooling. So the hazard addressed by HEPA filtration in this context is airborne pathogens.

HEPA filtration works by trapping very small particles as air passes through a fine filter, using diffusion, interception, and impaction to remove dust, pollen, smoke particulates, and bioaerosols. Because many pathogens travel in tiny droplets or attach to particles in the air, HEPA filtration can reduce inhalation exposure to airborne pathogens when used in respirators or air-cleaning systems. Gases and vapors aren’t removed by a standard HEPA filter, since they’re chemical substances rather than particulates. Oxygen deficiency and heat stress aren’t addressed by filtration alone either—those require different controls like breathable air or cooling. So the hazard addressed by HEPA filtration in this context is airborne pathogens.