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Plain-English study guide

OSHA 30 Construction Study Guide

Review the main ideas in short, simple steps. Then test yourself on what you learned.

What to focus on first

  • The 30-hour Outreach course covers safety topics in more depth and suits people with safety responsibility.
  • A competent person can spot existing and likely hazards and has authority to correct them.
  • Start with removing the danger, then guard it, then choose safe work procedures and protective equipment.
  • Check conditions before shifts and whenever weather or work changes.
  • There is no universal OSHA-mandated Outreach exam or passing score.

Topics in this course

  1. Supervision

    Set clear responsibilities, encourage near-miss reports and make it safe for workers to raise concerns. Supervisors must act on hazards, not simply record them.

  2. Hazard controls

    First ask whether a dangerous task can be eliminated or substituted. Physical protection and safe procedures usually provide better reliability than warnings alone.

  3. Inspections

    Inspect before risky work and after significant changes. Track corrective actions so the same hazard does not quietly return.

  4. Excavation

    Water, vibration, soil and nearby loads affect trench stability. Check safe entry, protective systems and the competent person’s inspection.

  5. Emergency planning

    Workers should know alarms, exits, gathering areas and whom to contact. Practise responses based on the site’s actual hazards.

Sample practice with explanations

What makes someone a competent person on a job site?

Correct answer: They can identify hazards and have authority to correct them

A competent person must recognize hazards and be authorized to take corrective action.

Which control usually offers the strongest risk reduction?

Correct answer: Remove the hazard

Eliminating a hazard is higher in the hierarchy than relying on PPE.

A sudden rainstorm changes trench conditions. What should the lead do?

Correct answer: Arrange a new inspection before re-entry

Changing conditions can make excavations unsafe.

Why is a near-miss report useful?

Correct answer: It helps prevent injuries before they happen

Near misses highlight hazards that can be corrected early.

What is the purpose of an emergency action plan?

Correct answer: Explain safe actions and roles during emergencies

An emergency plan tells people how to respond and who is responsible.

What should a supervisor do when a guard has been removed?

Correct answer: Stop unsafe use until the guard is restored

Unsafe equipment should not be operated without required safeguards.

A contractor introduces a new chemical. What should happen?

Correct answer: Review the hazards and communicate safe handling

Changes in products can create new hazards requiring review and communication.

Check the official source

Independent learning practice; not an authorized OSHA 30 course.

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