Hospital Corpsman (HM) Personnel Qualification Standards (PQS) Practice Test 2026 - Free Practice Questions and Study Guide

Airborne precautions focus on preventing inhalation of small, trickling aerosols that can stay suspended in the air and travel with ventilation. The most reliable protection is a respirator that both filters airborne particles and forms a tight seal to the face, so no air leaks around the edges. This protection must be fit-tested to confirm you can achieve a proper seal with the specific respirator model, and it must be a NIOSH-approved device rated for filtering at least 95% of airborne particles (N-95) or higher.

The reason the other options aren’t sufficient is that a standard surgical mask does not filter out small aerosolized particles well and does not provide a guaranteed seal, so it won’t reliably protect you from airborne pathogens. Simply having a private room or ventilation helps reduce transmission, but it does not replace the need for appropriate respiratory protection for anyone entering the room. A powered air-purifying respirator can be used in certain situations, but the baseline requirement before entering is a fit-tested NIOSH-approved N-95 or higher respirator, with other PPE as dictated by protocol.