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Which OSHA Outreach course does your work require?

Confirm the requirement with your employer, project, union, state, or locality before enrolling. This saved choice is separate from all lesson, flashcard, Test, Pathway, score, weak-area, missed-question, readiness, and exam-date progress.

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Course-aligned admissions: 0 / 826. All 798 distinct prompts, 5 lessons, and 23 cards remain mixed supplemental hazard review until every asset has complete course-family, procedure, topic, source, explanation, ownership, security, and human-review records.

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OSHA 30 Mixed Supplemental Practice

700 public supplemental prompts across 13 topics, each with a written explanation of why the correct answer is correct. Start below — the first questions are free and no account is required.

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Sample supplemental OSHA 30-Hour Construction questions

Fall Protection

At what height must fall protection be provided for workers on construction sites?

  1. A. 4 feet
  2. B. 6 feet
  3. C. 10 feet
  4. D. 15 feet

Answer: B. OSHA requires fall protection at 6 feet or more above a lower level in construction. This is the general trigger height for Subpart M.

Scaffolding

Scaffolds must be designed to support, without failure, their own weight and at least how many times the maximum intended load?

  1. A. 2 times
  2. B. 3 times
  3. C. 4 times
  4. D. 5 times

Answer: C. Each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied or transmitted to it.

Excavations

At what depth must a protective system be used in an excavation?

  1. A. 4 feet
  2. B. 5 feet
  3. C. 6 feet
  4. D. 10 feet

Answer: B. Excavations 5 feet or deeper require a protective system (sloping, shoring, or shielding) unless the excavation is made entirely in stable rock.

Work through every topic on the OSHA 30 supplemental question directory, or start mixed supplemental practice above.

OSHA 30-Hour Construction exam — frequently asked questions

How many questions are on the OSHA 30-Hour Construction exam?

The OSHA 30-Hour Construction exam typically has OSHA does not require one standard test. The exact count varies by state and exam version. VoltExam gives you 700 practice questions covering every topic tested.

What score do you need to pass the OSHA 30-Hour Construction exam?

The passing score for the OSHA 30-Hour Construction exam is typically Set by the authorized trainer or provider. Scoring significantly above the minimum on practice tests before exam day is strongly recommended to account for real-exam pressure.

What is the pass rate for the OSHA 30-Hour Construction exam?

The sponsor of the OSHA 30-Hour Construction exam does not publish a pass rate, so VoltExam does not estimate one or claim that practice predicts the result.

How long should I study for the OSHA 30-Hour Construction exam?

Most candidates study 30 contact hours through an authorized course for the OSHA 30-Hour Construction exam. Study time varies based on prior experience. Focusing on practice questions with explanations is the most time-efficient preparation method.

What topics are on the OSHA 30-Hour Construction exam?

The OSHA 30-Hour Construction exam covers topics including: Fall Protection, Scaffolding, Excavations, Electrical, PPE, and 8 more topic areas. VoltExam's free study mode organizes 700 quick-study questions by concept so you can target weak areas efficiently.