HAZWOPER 40 LESSON 7 QUIZ QUESTIONS AND ANSWERS |
HAZWOPER 40 STUDY GUIDE & PRACTICE TEST 2026/2027
Continuous flow - correct answer ✔✔The two main types of positive-pressure respirators are pressure-
demand and:
- correct answer ✔✔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:
- correct answer ✔✔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:
A breathing tube - correct answer ✔✔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:
Exhalation valve leakage - correct answer ✔✔The Assigned Protection Factor (APF) is determined
experimentally by measuring face-piece seal and:
19.5 - correct answer ✔✔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.
Draws contaminated air into the face-piece during inhalation - correct answer ✔✔The main
disadvantage of negative-pressure respirators is that, if any leaks develop, the user:
An escape SCBA - correct answer ✔✔A SAR is NOT recommended for entry into IDLH atmospheres
unless the apparatus is equipped with:
5 minutes - correct answer ✔✔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?
Closed-circuit SCBA - correct answer ✔✔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?
HAZWOPER 40 STUDY GUIDE & PRACTICE TEST 2026/2027
Continuous flow - correct answer ✔✔The two main types of positive-pressure respirators are pressure-
demand and:
- correct answer ✔✔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:
- correct answer ✔✔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:
A breathing tube - correct answer ✔✔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:
Exhalation valve leakage - correct answer ✔✔The Assigned Protection Factor (APF) is determined
experimentally by measuring face-piece seal and:
19.5 - correct answer ✔✔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.
Draws contaminated air into the face-piece during inhalation - correct answer ✔✔The main
disadvantage of negative-pressure respirators is that, if any leaks develop, the user:
An escape SCBA - correct answer ✔✔A SAR is NOT recommended for entry into IDLH atmospheres
unless the apparatus is equipped with:
5 minutes - correct answer ✔✔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?
Closed-circuit SCBA - correct answer ✔✔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?
