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Every state · Updated October 2026

OSHA Construction Safety Practice Test (29 CFR 1926): free practice test

Every contractor exam includes job-site safety. These questions follow the federal construction standards in 29 CFR 1926: fall protection, ladders, scaffolds, excavations, electrical and cranes.

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About the OSHA Safety exam

Every contractor exam includes job-site safety. These questions follow the federal construction standards in 29 CFR 1926: fall protection, ladders, scaffolds, excavations, electrical and cranes.

What's on the exam

OSHA Safety
Fall Protection
7 key facts
Stairways and Ladders
7 key facts
Scaffolds
7 key facts
Excavations and Trenching
7 key facts
Electrical Safety
7 key facts
Cranes and Derricks
7 key facts
Recordkeeping and Reporting
7 key facts
Health Hazards
5 key facts

Each branch is a topic in the official outline. Members see every key fact on the full mind map. Read the free study guide →

How to pass the OSHA Safety exam

  • Learn the trigger heights: 6 ft for fall protection, 10 ft for scaffolds, 4 ft and 5 ft in trenches, 19 inches for stairs.
  • On open-book exams, tab each subpart. Most questions take one lookup.
  • Recordkeeping dates (Feb 1 to Apr 30, 5 years) are free points.

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Create a free account after the test: your score by topic, a mistakes bank, the first study-notes topic, flashcards and the Construction Math Formula Sheet.

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Key study notes

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Sample questions with answers

These are the questions in the free test above, with answers. Try the test first. You'll learn more by getting some wrong.

1. Covers over holes in walking surfaces must support at least how many times the maximum intended load?
Answer: 2 times. 29 CFR 1926.502(i)(2): covers must support at least twice the weight of employees, equipment and materials that may be on them.
2. Each personal fall arrest anchorage must be capable of supporting at least:
Answer: 5,000 lb per employee. 29 CFR 1926.502(d)(15): 5,000 pounds per employee attached, or designed with a safety factor of two under a qualified person.
3. Guardrail systems must withstand a force of at least how many pounds applied within 2 inches of the top edge?
Answer: 200 lb. 29 CFR 1926.502(b)(3): 200 pounds in any outward or downward direction.
4. Portable ladders must be able to support at least how many times the maximum intended load (non-self-supporting, type I or II)?
Answer: 4 times. 29 CFR 1926.1053(a)(1)(i): at least 4 times the maximum intended load (extra-heavy-duty metal and plastic ladders: 3.3 times).
5. Ladder rungs must be spaced not less than 10 inches and not more than:
Answer: 14 inches apart. 29 CFR 1926.1053(a)(3)(i): 10 to 14 inches apart, measured center to center.
6. The minimum width of a scaffold platform for most work is:
Answer: 18 inches. 29 CFR 1926.451(b)(2): each platform and walkway must be at least 18 inches wide (with listed exceptions).
7. Supported scaffolds with a height-to-base-width ratio greater than what must be restrained by guying, tying or bracing?
Answer: 4 to 1. 29 CFR 1926.451(c)(1): more than 4 to 1 requires restraint.
8. Trenches 20 feet deep or more require a protective system designed by:
Answer: A registered professional engineer. 29 CFR 1926.652(b)(4) and (c)(4): excavations over 20 feet need a system designed by a registered professional engineer.
9. Which OSHA soil type is the most stable?
Answer: Type A. Appendix A to Subpart P: Type A is the most stable (e.g. clay), Type C the least (e.g. gravel, submerged soil).
10. The maximum allowable slope for an excavation less than 20 ft deep in Type C soil is:
Answer: 1-1/2:1 (34°). Table B-1: Type A 3/4:1, Type B 1:1, Type C 1-1/2:1 (34 degrees).
11. Extension cords used on construction sites must be:
Answer: Designed for hard or extra-hard usage. 29 CFR 1926.405(a)(2)(ii)(J): flexible cords must be rated for hard or extra-hard usage.
12. Under Subpart CC, crane operators must be:
Answer: Trained, certified or qualified as the standard requires. 29 CFR 1926.1427 requires operators to be trained and certified or qualified before operating covered equipment.
13. An employer must report a work-related fatality to OSHA within:
Answer: 8 hours. 29 CFR 1904.39: report fatalities within 8 hours. In-patient hospitalization, amputation or eye loss must be reported within 24 hours.
14. An in-patient hospitalization of one employee from a work-related incident must be reported to OSHA within:
Answer: 24 hours. 29 CFR 1904.39(a)(2): within 24 hours.
15. The OSHA permissible exposure limit for respirable crystalline silica in construction is:
Answer: 50 µg/m³ as an 8-hour TWA. 29 CFR 1926.1153: the PEL is 50 micrograms per cubic meter averaged over an 8-hour day, with an action level of 25.

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Exam details are summarized from the official candidate information available in October 2026. Boards change formats and fees, so confirm with OSHA 29 CFR 1926 (construction standards) before you book. ContractorConquer is not affiliated with any licensing board or testing company.

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