1|Page
HAZWOOPER 40 FINAL EXAM AND PRACTICE EXAM
NEWEST 2026 NEWEST EXAM WITH COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+||BRAND NEW!!!
To protect against the hazard of fire or explosion: -
ANSWER-Have qualified personnel field monitor for
explosive atmospheres and flammable vapors
Use non-sparking, explosion-proof equipment
Explosions and fires may arise spontaneously, but usually
they result from activities such as: - ANSWER-Accidentally
mixing chemicals
Introducing and ignition source
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Moving drums
There are many potential causes of explosions and fires at
hazardous waste sites. Which of the following is a good
example? - ANSWER-Chemical reactions that produce
explosion, fire, or heat
What do we know about oxygen? - ANSWER-Oxygen is
heavier than air
Oxygen is a strong oxidant which generates fire hazards
If oxygen is present there must be NO uncontrolled
contact with flammables
Concentrations of 19.5% or lower are deficient
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Oxygen deficiency may result from - ANSWER-The
displacement of oxygen by another gas
the consumption of oxygen by a chemical reaction
What is the lowest concentration of oxygen allowed? -
ANSWER-16%
What are the three basic ways to protect yourself from
radiation? - ANSWER-Reduce time of exposure
Increase distance from exposure
Use shielding
Which radiation causes serious damage to the body? -
ANSWER-Gamma
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Background levels of radiation are - ANSWER-0.01-0.02
mrem/hr
Which radiation causes harmful burns to the skin? -
ANSWER-Beta
Protection for vertical drops: - ANSWER-Guardrails, safety
net systems, and personal fall arrest systems
It is better to use fall prevention systems than fall
protection systems because - ANSWER-Prevention
systems provide more positive safety means
HAZWOOPER 40 FINAL EXAM AND PRACTICE EXAM
NEWEST 2026 NEWEST EXAM WITH COMPLETE
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A+||BRAND NEW!!!
To protect against the hazard of fire or explosion: -
ANSWER-Have qualified personnel field monitor for
explosive atmospheres and flammable vapors
Use non-sparking, explosion-proof equipment
Explosions and fires may arise spontaneously, but usually
they result from activities such as: - ANSWER-Accidentally
mixing chemicals
Introducing and ignition source
,2|Page
Moving drums
There are many potential causes of explosions and fires at
hazardous waste sites. Which of the following is a good
example? - ANSWER-Chemical reactions that produce
explosion, fire, or heat
What do we know about oxygen? - ANSWER-Oxygen is
heavier than air
Oxygen is a strong oxidant which generates fire hazards
If oxygen is present there must be NO uncontrolled
contact with flammables
Concentrations of 19.5% or lower are deficient
,3|Page
Oxygen deficiency may result from - ANSWER-The
displacement of oxygen by another gas
the consumption of oxygen by a chemical reaction
What is the lowest concentration of oxygen allowed? -
ANSWER-16%
What are the three basic ways to protect yourself from
radiation? - ANSWER-Reduce time of exposure
Increase distance from exposure
Use shielding
Which radiation causes serious damage to the body? -
ANSWER-Gamma
, 4|Page
Background levels of radiation are - ANSWER-0.01-0.02
mrem/hr
Which radiation causes harmful burns to the skin? -
ANSWER-Beta
Protection for vertical drops: - ANSWER-Guardrails, safety
net systems, and personal fall arrest systems
It is better to use fall prevention systems than fall
protection systems because - ANSWER-Prevention
systems provide more positive safety means
