HAZWOPER 40 LESSON 7 QUIZ|2023/24 UPDATE|GRADED A+

The two main types of positive-pressure respirators are pressure-demand and: Continuous flow The assembly that has been approved by MSHA and NIOSH to protect against organic vapors is tested against only a single challenge substance. That substance is: Two types of fit tests can be performed. The first is a qualitative fir test, which exposes the wearer to irritants (stannic chloride) or substances that have distinctive odors or tastes. The second type of test is the: Cartridges usually attach directly to the respirator face-piece. The larger volume canisters attach to the chin of the face-piece or are carried with a harness and attached to the face-piece by: A breathing tube The Assigned Protection Factor (APF) is determined experimentally by measuring face-piece seal and: Exhalation valve leakage Air-purifying respirators have limited use at hazardous waster sites and can be used only when the ambient atmosphere contains sufficient oxygen that is greater than (blank) percent. 19.5 The main disadvantage of negative-pressure respirators is that, if any leaks develop, the user: Draws contaminated air into the face-piece during inhalation