Trade certification · Construction safety
OSHA 30-Hour Construction Outreach (knowledge check)
A deeper bank for the 30-hour OSHA construction course, separate from the OSHA 10 bank: managing safety and health, the Focus Four with the actual numbers from 29 CFR 1926 (fall protection, power line clearances, trench slopes), PPE, silica, lead, asbestos and noise, stairways and ladders, scaffolds, cranes, concrete and steel erection, fire protection, welding and confined spaces.
Questions last checked against the official sources on October 11, 2026.
The real exam at a glance
- Course
- At least 30 hours: 14 h required, 12 h electives (6+ topics), 4 h optional
- Daily limit
- 7.5 student contact hours per day, so at least 4 days
- Finish within
- 180 calendar days of the class start
- Tests
- Set by the trainer or online provider; online providers report 70% with up to 3 attempts
- Card
- DOL course completion card, issued within 90 days; replacement only within 5 years
- Intended for
- Workers with some safety responsibilities
What you'll practise
Try a question
May the top step of a stepladder be used as a step in construction?
- Yes, if a coworker holds the ladder
- Yes, for ladders shorter than 6 feet
- Yes, if the worker faces the ladder
- No
Show the answer
D. No — The top or top step of a stepladder must not be used as a step.
Sample questions by topic (in English)
- About the 30-hour course
- Introduction to OSHA and managing safety
- Focus Four: falls
- Focus Four: electrocution
- Focus Four: struck-by
- Focus Four: caught-in or between
- Personal protective equipment
- Health hazards in construction
- Stairways and ladders
- Fire protection and welding
- Tools, electrical and site hazards
Ask the examiner
Ask about this exam: why an answer is wrong, a grammar point, or “quiz me on …”.
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Questions about the OSHA 30 Construction
Is this the official OSHA 30 Construction?
No. Semplr is independent and not affiliated with the exam body. We write every question ourselves, in the official format and at the official level.
What is the real OSHA 30 Construction like?
Course: At least 30 hours: 14 h required, 12 h electives (6+ topics), 4 h optional. Daily limit: 7.5 student contact hours per day, so at least 4 days. Finish within: 180 calendar days of the class start. Tests: Set by the trainer or online provider; online providers report 70% with up to 3 attempts. Card: DOL course completion card, issued within 90 days; replacement only within 5 years. Intended for: Workers with some safety responsibilities.
How is my practice marked?
Instantly. You see your score against the pass mark, and an explanation for every question — including the ones you got right.
Can I take it on my phone?
Yes. The whole mock exam works on a phone, and your progress is saved in your browser.
Ready for a full run?
One sitting, real timing, then your score against the pass mark.
Start the free mock exam