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HAZWOPER 40: Lesson 7 Quiz
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HAZWOPER 40: Lesson 7 QuizThe 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
-A SAR is NOT recommended for entry into IDLH atmospheres unless the
apparatus is equipped with: - -An escape SCBA
-The combination system provides up to 60 minutes of self-contained air,
whereas the escape SCBA contains much less air, generally for how many
minutes? - -5 minutes
-In which type of respirator, is exhaled air recycled by removing the carbon
dioxide with an alkaline scrubber and by replenishing the consumed oxygen
with oxygen from a solid, liquid, or gaseous source? - -Closed-circuit SCBA
-
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