Free General Contractor License Construction Safety and OSHA Questions and Answers — Questions and Answers
Question 1: According to OSHA standards for construction (29 CFR 1926.501), at what minimum height on a walking/working surface with an unprotected side or edge is fall protection generally required?
- 4 feet
- 10 feet
- 6 feet (Correct answer)
- 8 feet
Correct answer: 6 feet
OSHA regulation 29 CFR 1926.501(b)(1) explicitly states that each employee on a walking/working surface with an unprotected side or edge which is 6 feet or more above a lower level shall be protected from falling by a guardrail system, safety net system, or personal fall arrest system.
Question 2: A construction crew is working in a trench that is 8 feet deep. The excavated soil and other materials are piled at the edge of the trench. What is the minimum distance that these spoil piles must be kept from the edge of the excavation?
- 1 foot
- 2 feet (Correct answer)
- 4 feet
- 5 feet
Correct answer: 2 feet
OSHA standard 29 CFR 1926.651(j)(2) requires that excavated materials, equipment, and other potential falling hazards be kept at least 2 feet from the edge of excavations to prevent them from falling or rolling into the trench and endangering workers.
Question 3: A supported scaffold on a construction site will be used by workers during the next shift. According to OSHA regulations, who must inspect the scaffold and when must this inspection occur?
- A project manager, at the end of each week.
- The site superintendent, only after it is first erected.
- A qualified engineer, at the beginning of the project.
- A competent person, before each work shift. (Correct answer)
Correct answer: A competent person, before each work shift.
OSHA standard 29 CFR 1926.451(f)(3) mandates that scaffolds and their components be inspected for visible defects by a competent person before each work shift and after any event that could affect the scaffold's structural integrity.
Question 4: A contractor must ensure that all employees on a job site understand the dangers of the chemicals they are working with. Which OSHA standard requires employers to have a written program, ensure proper labeling of containers, and provide Safety Data Sheets (SDSs) for all hazardous chemicals?
- Respiratory Protection Standard
- Hazard Communication Standard (Correct answer)
- Confined Spaces Standard
- Fall Protection Standard
Correct answer: Hazard Communication Standard
OSHA's Hazard Communication Standard (HCS), 29 CFR 1926.59, is designed to ensure that information about chemical and toxic substance hazards in the workplace is communicated to workers. It requires a written hazard communication program, labels on containers, and accessible Safety Data Sheets (SDSs).
Question 5: A worker is operating a jackhammer to break up a concrete slab. Which of the following combinations of Personal Protective Equipment (PPE) is MOST essential for this specific task?
- Hard hat, safety harness, and rubber boots
- Welding helmet, leather gloves, and a respirator
- Hard hat, hearing protection, safety glasses, and steel-toed boots (Correct answer)
- High-visibility vest, latex gloves, and a face shield
Correct answer: Hard hat, hearing protection, safety glasses, and steel-toed boots
Operating a jackhammer exposes a worker to multiple hazards: falling objects (requiring a hard hat), high noise levels (requiring hearing protection), flying debris (requiring safety glasses), and foot impact/crushing hazards (requiring steel-toed boots). This combination addresses the primary risks of the task.
Question 6: During an excavation, a competent person must inspect the trench daily and as conditions change. For a trench that is 5 feet deep or more, what is required unless the excavation is made entirely in stable rock?
- A written permit from a structural engineer
- Atmospheric testing every hour
- An adequate protective system (e.g., shoring, sloping, or shielding) (Correct answer)
- A designated flagger to direct vehicle traffic
Correct answer: An adequate protective system (e.g., shoring, sloping, or shielding)
OSHA standard 29 CFR 1926.652(a)(1) states that each employee in an excavation shall be protected from cave-ins by an adequate protective system, except when excavations are less than 5 feet in depth and examination of the ground by a competent person provides no indication of a potential cave-in, or the excavation is in stable rock.
Free General Contractor License Construction Safety and OSHA Questions and Answers
According to OSHA standards for construction (29 CFR 1926.501), at what minimum height on a walking/working surface with an unprotected side or edge is fall protection generally required?