Quantitative Fit Test - The measurement of the effectiveness of a respirator seal in the surrounding atmosphere. Resistance - Opposition of the flow or air, as through a canister, cartridge, or particulate filter. Respirator - A device designed to protect the wearer from inhalation of harmful atmospheres. A supply of approved compressed air contained in a gas cylinder is carried by the wearer. For the purpose of this manual, a hose-mask respirator equipped with a facepiece, breathing tube, safety harness, and safety line.
Air is supplied through a hose connected to a compressed-air cylinder or air compressor.
Test Subject - A person wearing a respirator for quantitative fit testing. Value - A list published yearly by the American Conference of Governmental Industrial Hygienists as a guide for exposure concentrations that a healthy individual normally can tolerate for eight hours a day, five days a week, without harmful effects. Vapor - The gaseous state of a substance that is solid or liquid at ordinary temperature and pressure.