The illustration shows a generic example of a box plot with the maximum, third quartile, median, first quartile, and minimum values labeled. The relative vertical spacing between the labels reflects the values of the variable in proportion.
Respirator Types Two basic types of respirators are: â¢ air-purifying; andâ¢ supplied-air respirators. Air-purifying respirators remove airborne contaminants such as particles, toxic vapors, and/or gases.
General Considerations. As with other types of respiratory protection devices, required use of this type of. respirator is contingent upon medical qualification, fit-testing, and training. Voluntary use of a filtering facepiece is not subject to medical qualification or fit-.