Free Practice Test
Free OSHA 30 Practice Test
Take our free 10-question OSHA 30 construction practice test — covering the Focus Four hazards, fall protection, PPE, electrical safety, and hazard recognition. No signup required. See your score instantly.
10 Free OSHA 30 Construction Practice Questions
Q1. At what height must fall protection be provided for workers on construction sites?Show answer
✓ Correct Answer: 6 feet
OSHA requires fall protection at 6 feet or more above a lower level in construction. This is the general trigger height for Subpart M.
Q2. A controlled access zone used for leading edge work must be defined by a control line erected not less than 6 feet nor more than how many feet from the leading edge?Show answer
✓ Correct Answer: 25 feet
A controlled access zone for leading edge work must be defined by a control line erected not less than 6 feet (1.8 m) nor more than 25 feet (7.7 m) from the leading edge. This zone limits access to authorized employees only.
Q3. When a competent person determines that work on a scaffold is unsafe due to weather conditions, what must happen?Show answer
✓ Correct Answer: Work on the scaffold must be stopped until conditions improve
Work on or from scaffolds is prohibited during storms or high winds unless a competent person has determined that it is safe for employees to be on the scaffold and those employees are protected.
Q4. Receptacles on construction sites that are not part of the permanent wiring must have:Show answer
✓ Correct Answer: GFCI protection or be part of an AEGCP
All 120-volt, single-phase, 15- and 20-ampere receptacle outlets on construction sites that are not part of the permanent wiring must have GFCI protection or be covered by an AEGCP.
Q5. Stairway landings must be at least as wide as the stair and at least how many inches deep?Show answer
✓ Correct Answer: 30 inches
Stairway landings shall be at least as wide as the stair and at least 30 inches measured in the direction of travel.
Q6. The signal person must be:Show answer
✓ Correct Answer: Qualified by a third-party evaluator or employer's qualified evaluator
Signal persons must be qualified by either a third-party qualified evaluator or the employer's qualified evaluator. They must know and understand the standard hand signals and be competent in the application of required signals.
Q7. What is 'stable rock' as defined in OSHA's excavation standard?Show answer
✓ Correct Answer: Natural solid mineral matter that can be excavated with vertical sides and remain intact while exposed
Stable rock is defined as natural solid mineral material that can be excavated with vertical sides and will remain intact while exposed. Excavations in stable rock do not require sloping or shoring, as the rock is self-supporting.
Q8. What does a Type I hard hat protect against?Show answer
✓ Correct Answer: Top impacts only (blows to the top of the head)
A Type I hard hat is designed to reduce the force of impact resulting from a blow to the top of the head only. Type II hard hats provide protection from blows to both the top and sides of the head. The type designation indicates the area of protection, while the class designation (E, G, or C) indicates the level of electrical protection.
Q9. What is the most common health effect associated with prolonged exposure to lead in construction?Show answer
✓ Correct Answer: Damage to the nervous system, kidneys, and reproductive system
Lead exposure in construction can cause serious health effects including damage to the nervous system, kidneys, reproductive system, and blood-forming organs. Workers can be exposed during activities such as demolition, renovation, abrasive blasting, and cutting/welding lead-painted surfaces.
Q10. Which item is an engineering control?Show answer
✓ Correct Answer: Guarding a machine hazard
Engineering controls isolate people from hazards through physical design or equipment. Guardrails, machine guards, ventilation, and trench shields are examples.
What Does the OSHA 30 Construction Exam Cover?
The OSHA 30-Hour Construction course covers fall protection, hazard recognition, electrical safety, excavation, PPE, and health hazards over 30 hours of content, with short quizzes throughout and a final exam. The final is typically 30–100 multiple-choice questions requiring about 70% to pass, with the exact length set by the authorized provider. Most platforms let you retake quizzes and the final if you fall short. The most-tested area is the 'Focus Four' hazards — falls, struck-by, caught-in/between, and electrocution — which cause the majority of construction fatalities. After passing you receive an OSHA 30 Department of Labor completion card.
How Hard Is the OSHA 30 Exam?
The OSHA 30-Hour Construction course is low-difficulty, with completion rates above 95%, because it is training-based rather than a high-stakes standardized test. Most providers require about 70% on the final and allow retakes, so the real challenge is completing all 30 hours of content rather than the exam itself. Exact question counts vary between providers because the course is standardized by content, not by a single national test.
How to Study for the OSHA 30 Exam
- 1.Concentrate on the Focus Four hazards — falls, struck-by, caught-in/between, and electrocution account for the largest share of questions and of real construction deaths.
- 2.Know fall-protection triggers — learn fall-protection trigger heights and ladder and scaffold rules; falls are the leading Focus Four hazard.
- 3.Learn each PPE type — understand the purpose of each type of personal protective equipment and when it is required.
- 4.Take the module quizzes seriously — they preview the final exam. Review anything you miss along the way.
- 5.Finish all 30 hours — the course is self-paced and untimed on most platforms, so the key is completing the full 30 hours of content; you need about 70% on the final and can usually retake it.
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