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Respirators are important and commonly used in the workplace. This course explains what a respirator is and the types of hazards for which they can provide protection. It also explains the difference between air-supplying and air-purifying respirators as well as tight-fitting and loose-fitting respirators. The use of respirators within the hierarchy of controls is covered, as are assigned protection factor (APF), selection criteria, and cleaning, maintaining, inspecting, and storing procedures. Finally, training and personal responsibility are covered.