Missouri Pesticide Practice Exam

Air-purifying respirators protect you by filtering or absorbing contaminants from the air you breathe. In pesticide work, pesticides can be present as aerosols or vapors, and the respirator’s filters or cartridge traps or adsorbs those molecules so cleaner air reaches your lungs. This is different from systems that provide air from a cylinder; those are supplied‑air types. A respirator’s job isn’t to seal to the skin or to neutralize pesticides on contact, but to remove the hazardous substances from the air before you inhale them. If the environment lacks enough oxygen or the pesticide isn’t captured by the cartridge, a different respirator is needed.