OSHA HAZWOPER 40-Hour (29 CFR 1910.120) course final exam
Site characterization and monitoring: practice questions
Our HAZWOPER 40-Hour bank has 19 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
Periodic monitoring should be considered when:
- Work moves to a new part of the site
- It is a holiday
- A new supervisor is hired
- The crew takes its lunch break
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A. Work moves to a new part of the site — 1910.120(h)(3) lists starting work on a different portion, new contaminants, a different operation, or leaking drums.
Question 2
During initial entry, besides instruments, what else must workers do?
- Collect soil samples for a garden
- Watch for signs of IDLH conditions
- Take photos for the company website
- Count the number of drums by colour
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B. Watch for signs of IDLH conditions — 1910.120(c)(6)(iii) requires visually observing for signs of actual or potential IDLH or other dangerous conditions.
Question 3
Once substances and concentrations are known, the employer must:
- Stop all monitoring for the project
- Identify the risks and inform workers
- Remove all PPE requirements immediately
- Send the results only to the client
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B. Identify the risks and inform workers — 1910.120(c)(7) requires identifying the risks and informing employees who will work on site.
Question 4
If preliminary evaluation does not identify site hazards, the minimum PPE for initial entry is equivalent to:
- Level D
- Level C
- No PPE needed
- Level B
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D. Level B — 1910.120(c)(5)(iii) requires at least Level B protection when hazards are not sufficiently identified.
Question 5
After cleanup starts, which employees must be monitored with personal sampling?
- Only office staff
- The highest-exposed workers
- Only the youngest workers
- Only visitors
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B. The highest-exposed workers — 1910.120(h)(4) requires monitoring employees likely to have the highest exposures.