OSHA HAZWOPER 40-Hour (29 CFR 1910.120) course final exam
Decontamination: practice questions
Our HAZWOPER 40-Hour bank has 13 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
An employee's non-impermeable clothing gets wet with a hazardous substance. They must:
- Remove it immediately and shower
- Let it dry out in the sun
- Finish the shift and then change
- Wipe it off with a rag
Show the answer
A. Remove it immediately and shower — 1910.120(k)(5)(ii) requires immediate removal and showering.
Question 2
When must decontamination procedures be developed?
- Only if OSHA asks
- Before anyone enters exposure areas
- After the first exposure occurs
- After the job ends and the site is closed
Show the answer
B. Before anyone enters exposure areas — 1910.120(k)(2)(i) requires procedures before any employees or equipment enter such areas.
Question 3
Decontamination procedures must be monitored and, if ineffective:
- Recorded but left unchanged
- Hidden from the workers
- Ignored until the job ends
- Corrected
Show the answer
D. Corrected — 1910.120(k)(2)(iv) requires appropriate steps to correct deficiencies.
Question 4
What happens to equipment and solvents used for decontamination?
- Poured out onto the ground
- Taken home by the workers
- Reused on the next job without any cleaning
- Decontaminated or disposed of properly
Show the answer
D. Decontaminated or disposed of properly — 1910.120(k)(4) requires them to be decontaminated or disposed of properly.
Question 5
Who monitors the effectiveness of decontamination procedures?
- The site safety and health supervisor
- The client or the client's appointed agent
- The waste hauler at pickup
- Each worker for themselves
Show the answer
A. The site safety and health supervisor — 1910.120(k)(2)(iv) assigns monitoring to the site safety and health supervisor.