OSHA 30-Hour Construction Outreach (knowledge check)
Health hazards in construction: practice questions
Our OSHA 30 Construction bank has 40 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
If initial monitoring shows lead exposure above the PEL, how often must monitoring be repeated?
- Every 6 months
- Quarterly
- Once a year
- Never again
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B. Quarterly — Above the PEL, monitoring must be quarterly; at or above the action level but at or below the PEL, at least every 6 months.
Question 2
What peak level should impulse or impact noise not exceed under 1926.52?
- 140 dB peak sound pressure level
- 115 dB
- 100 dB
- 160 dB, the level of a jackhammer at close range
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A. 140 dB peak sound pressure level — Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.
Question 3
What is OSHA's 8-hour permissible exposure limit for asbestos?
- 1.0 fiber per cubic centimeter
- 10 fibers per cubic centimeter
- 0.1 fiber per cubic centimeter
- 0.01 fiber per cubic centimeter
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C. 0.1 fiber per cubic centimeter — The 8-hour TWA PEL is 0.1 f/cc; the excursion limit is 1.0 f/cc averaged over 30 minutes.
Question 4
What is the action level for respirable crystalline silica?
- 50 micrograms per cubic meter
- 10 micrograms per cubic meter
- 25 micrograms per cubic meter as an 8-hour TWA
- 5 micrograms per cubic meter, the level at which work must stop
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C. 25 micrograms per cubic meter as an 8-hour TWA — The action level is 25 µg/m3 as an 8-hour TWA; the standard does not apply where exposure will remain below it under foreseeable conditions.
Question 5
On a multi-employer site, who must abate asbestos hazards?
- Every employer on the site equally, whoever created the contamination
- The contractor who created or controls the source of contamination
- The building owner only
- OSHA, after it inspects the site and issues a citation
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B. The contractor who created or controls the source of contamination — Asbestos hazards on a multi-employer site must be abated by the contractor who created or controls the source of contamination; other employers must still protect their own workers.