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Question 1. Which OSHA Focus Four hazard is most directly addressed by the requirement to wear a full-face respirator when removing friable asbestos? A) Falls B) Caught-in or - Between C) Struck-By D) Electrocution Answer: C Explanation: The respirator protects the worker from inhaling airborne asbestos fibers, which is a “caught-in or - between” hazard where the worker can become enveloped by contaminants. Question 2. Under 29 CFR 1926 Subpart T, what minimum distance must a competent person maintain from the edge of a demolition zone when a collapse is possible? A) 10 ft B) 15 ft C) 20 ft D) 25 ft Answer: B Explanation: Subpart T requires a minimum 15-ft exclusion zone around any area where a structural collapse could occur to protect workers from falling debris. Question 3. Which PPE item is mandatory for any worker operating a hydraulic excavator on a demolition site? A) Hard hat with chin strap B) Cut-resistant gloves C) Hearing protection D) All of the above Answer: D Explanation: Excavator operators must wear hard hats, cut-resistant gloves for handling metal, and hearing protection due to high noise levels.
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Question 4. When a demolition project involves interior removal of a non-load-bearing wall, the primary reason for tagging the wall as “Do Not Disturb” is to: A) Prevent accidental demolition of hidden utilities B) Ensure the wall is not painted prematurely C) Avoid disturbing the building’s fire rating D) Keep the wall’s acoustic properties intact Answer: A Explanation: Tagging prevents workers from unintentionally damaging concealed electrical, plumbing, or HVAC lines that may be present in the wall. Question 5. According to NFPA 241, a hot-work permit is required when: A) Using a portable generator within 30 ft of a flammable liquid spill B) Cutting steel beams with an oxy-acetylene torch outdoors C) Welding inside a building that has been fully cleared of combustible materials D) All of the above Answer: D Explanation: NFPA 241 mandates a hot-work permit for any activity that could produce ignition sources near combustible materials, regardless of location. Question 6. Which of the following is NOT a recognized method for controlling dust on a demolition site? A) Water misting B) Vacuum extraction with HEPA filters C) High-speed wind machines D) Covering debris piles with geotextile fabric Answer: C Explanation: High-speed wind machines would increase dust dispersion; the other methods actively suppress or contain dust.
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A) Using a wrecking ball to sequentially knock down walls B) Placing explosive charges to bring the structure down in a single event with pre-determined fall zones C) Dismantling the building piece-by-piece from the top down D) Manually breaking concrete with jackhammers Answer: B Explanation: Controlled collapse utilizes explosives placed strategically to cause the building to fall within designated zones. Question 11. What is the primary purpose of a Storm Water Pollution Prevention Plan (SWPPP) on a demolition site? A) To reduce the amount of water used for dust suppression B) To prevent contaminated runoff from entering municipal storm drains C) To comply with OSHA’s trenching requirements D) To schedule daily water testing for contaminants Answer: B Explanation: SWPPP is designed to prevent pollutants such as asbestos fibers, oil, and concrete slurry from leaving the site via storm water. Question 12. During lockout/tagout (LOTO) of a hydraulic excavator, which energy source must be isolated first? A) Hydraulic pressure B) Electrical power to the control console C) Pneumatic lines for the brakes D) All sources must be isolated simultaneously Answer: D Explanation: OSHA requires that all energy sources be isolated and locked out before work begins on equipment. Question 13. Which of the following is a required component of a demolition site’s housekeeping program?
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A) Weekly painting of all concrete surfaces B) Daily removal of all debris from walkways C) Monthly replacement of all guardrails D) Quarterly replacement of PPE Answer: B Explanation: Daily removal of debris from walkways helps prevent slips, trips, and falls, fulfilling housekeeping standards. Question 14. A demolition contractor discovers lead-based paint during interior strip-out. The immediate next step is to: A) Continue work and seal the area with plastic sheeting B) Notify the competent person and halt work until a lead-safe work plan is approved C) Remove the paint with a high-pressure water spray D) Cover the paint with fresh latex paint and proceed Answer: B Explanation: OSHA requires a lead-safe work plan and competent person approval before continuing when lead-based paint is identified. Question 15. Which of the following statements about “caught-in or - between” hazards is correct? A) They only apply to moving machinery B) They include being struck by falling objects C) They refer to situations where a worker can be trapped between two objects or in a moving part D) They are covered under the fall protection standard only Answer: C Explanation: “Caught-in or - between” hazards involve workers becoming trapped between equipment, materials, or structural components. Question 16. When using a robotic demolition arm, the operator must verify which of the following before starting work?
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B) 6 ft C) 8 ft D) 10 ft Answer: B Explanation: OSHA’s construction standard (29 CFR 1926.501) requires fall protection at 6 ft or higher. Question 20. When a demolition crew must cut through a steel column, which respiratory protection is required under NESHAP for asbestos? A) N95 respirator B) Half-face air-purifying respirator with P100 filter C) Full-face powered air-purifying respirator (PAPR) with HEPA filter D) No respiratory protection is needed if dust is wet-suppressed Answer: C Explanation: Full-face PAPRs with HEPA filters provide the highest level of protection against asbestos fibers generated during cutting. Question 21. Which of the following best defines a “universal waste” in demolition projects? A) Any waste that can be recycled without processing B) Waste that is hazardous but exempt from RCRA regulations, such as batteries and fluorescent lamps C?** Answer: B Explanation: Universal waste includes specific hazardous items like batteries, mercury devices, and fluorescent bulbs that have streamlined disposal regulations. Question 22. The primary reason for installing a fire watch after hot-work is completed is to: A) Ensure the fire extinguisher is still functional B) Monitor the area for hidden smoldering fires that could reignite
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C) Verify that the hot-work permit has been signed off D) Record the temperature of the surrounding surfaces Answer: B Explanation: A fire watch watches for hidden ignition sources that may cause a fire after hot-work is finished. Question 23. Which of the following is NOT a typical component of a demolition site’s traffic control plan? A) Placement of signage and barricades B) Designated routes for delivery trucks and waste removal vehicles C) Scheduling of daily employee lunch breaks D) Coordination with local police for street closures Answer: C Explanation: Employee lunch scheduling does not affect site traffic control; the other options are essential for managing vehicular movement. Question 24. When a demolition contractor must remove a concrete slab, the most common method to prevent uncontrolled cracking is to: A) Use a jackhammer at maximum impact force B) Apply a thin layer of water to the slab before breaking C) Score the slab with a saw to create controlled break lines D) Pull the slab off with a crane without any scoring Answer: C Explanation: Scoring creates predetermined fracture lines, reducing the risk of uncontrolled cracking. Question 25. Which OSHA standard specifically addresses the use of personal fall arrest systems (PFAS) on demolition sites? A) 29 CFR 1926.501(b)(10) B) 29 CFR 1926.502(a)(3) C) 29 CFR 1926.503(b)(2)
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Answer: B Explanation: HazCom mandates that all hazardous chemicals be labeled and that Safety Data Sheets be readily available. Question 29. When a demolition project includes removal of a historic façade, the most appropriate action to comply with preservation regulations is to: A) Remove the façade quickly to avoid damage B) Document the façade with photographs and drawings before removal and store elements for reuse or archival C) Paint over the façade to hide any damage D) Replace the façade with a modern replica after demolition Answer: B Explanation: Documentation and preservation of historic elements are required to meet historic preservation guidelines. Question 30. Which of the following best describes the OSHA definition of a “competent person” on a demolition site? A) Any employee who has completed a demolition safety course B) A person capable of identifying existing and predictable hazards and has authority to correct them C) The site supervisor who signs daily attendance logs D) The owner of the demolition company Answer: B Explanation: OSHA defines a competent person as one who can identify hazards and has the authority to take corrective action. Question 31. In the event of a trench collapse, the first action a worker should take is to: A) Attempt to climb out of the trench immediately B) Call emergency services and begin a rescue plan while avoiding further entry into the trench C) Use a handheld pump to remove water from the trench
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D) Remove all equipment from the trench to reduce weight Answer: B Explanation: Immediate rescue attempts can cause further injury; emergency services should be summoned and a safe rescue plan initiated. Question 32. Which of the following is a required feature of a guardrail system on a demolition site? A) Top rail height of 42 ± 3 inches B) Mid-rail height of 24 inches C) Must be able to withstand a 200-lb load applied horizontally at any point D) All of the above Answer: D Explanation: OSHA’s guardrail requirements specify top rail height, mid-rail height, and load resistance. Question 33. When disposing of asbestos-containing debris, the waste must be placed in containers that are: A) Labeled “Non-hazardous” if the material is non-friable B) Sealed, leak-tight, and marked with the universal asbestos label C) Open-topped for easier loading onto trucks D) Stored for at least 30 days before transport to a landfill Answer: B Explanation: Asbestos waste must be placed in sealed, leak-tight containers with proper labeling to prevent fiber release. Question 34. Which of the following best explains why a demolition contractor would use a “soft-start” function on hydraulic equipment? A) To reduce noise levels during operation B) To prevent sudden jerking motions that could destabilize a structure C) To increase the speed of demolition work D) To conserve fuel during low-load periods
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Explanation: Temporary utilities and support systems dictate safe sequencing to maintain structural integrity and safety. Question 38. When a demolition crew must remove a concrete slab that rests on a steel beam, the recommended method to protect the beam from impact damage is to: A) Use a sledgehammer directly on the slab B) Place wooden sleepers beneath the slab before breaking it C) Cut the slab into small pieces with a concrete saw D) Lift the slab with a crane without any protective measures Answer: B Explanation: Wooden sleepers distribute impact forces, protecting underlying steel members. Question 39. In a demolition project, the term “dust suppression factor” refers to: A) The ratio of water used to the volume of dust generated B) The number of dust control devices installed per acre C) The percentage reduction in airborne particulate concentration achieved by a control method D) The legal limit for dust exposure on a construction site Answer: C Explanation: Dust suppression factor quantifies how much a control method reduces airborne particulates. Question 40. Which OSHA regulation governs the use of ladders on demolition sites? A) 29 CFR 1926. B) 29 CFR 1926. C) 29 CFR 1926.501(b)(1) D) 29 CFR 1926.501(b)(3) Answer: B
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Explanation: 29 CFR 1926.1050 covers ladder safety in construction, including demolition. Question 41. If a demolition site’s SWPPP requires sediment basins, the primary design purpose of these basins is to: A) Store excess demolition debris for later recycling B) Capture and settle out suspended solids from runoff before discharge C) Provide a water source for dust suppression D) Serve as a fire-break zone around the site perimeter Answer: B Explanation: Sediment basins allow suspended particles to settle, preventing them from entering storm drains. Question 42. Which of the following is the correct order of steps when performing a “pull-down” demolition using cables? A) Install cables → Apply tension → Release tension → Remove debris B) Apply tension → Install cables → Release tension → Inspect area C) Install cables → Apply tension → Release tension → Conduct post-demolition inspection D) Install cables → Release tension → Apply tension → Dispose of cables Answer: C Explanation: Cables are installed, tension is applied to control the fall, tension is released to allow collapse, and a post-demolition inspection follows. Question 43. When a demolition contractor encounters an unknown material that may be PCB-containing, the correct response is to: A) Assume it is safe and continue demolition B) Stop work, isolate the area, and arrange for laboratory testing before proceeding C) Remove the material using a standard dust mask D) Treat the material as regular concrete waste and dispose of it in a landfill Answer: B
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Question 47. Under the OSHA standard for trenching, a protective system must be installed when the trench depth exceeds: A) 4 ft B) 5 ft C) 6 ft D) 8 ft Answer: C Explanation: OSHA requires protective systems for trenches deeper than 5 ft (i.e., 6 ft or more). Question 48. Which of the following best explains why a demolition site must have a “site-specific” emergency action plan (EAP)? A) To satisfy a federal requirement that applies only to demolition sites B) Because each site has unique hazards, layouts, and access routes that affect emergency response C) To reduce the cost of insurance premiums D) To eliminate the need for a fire department presence on site Answer: B Explanation: An EAP must reflect the specific conditions and hazards of each demolition site for effective response. Question 49. If a demolition project includes removal of a rooftop HVAC unit containing refrigerant, the contractor must: A) Release the refrigerant into the atmosphere before removal B) Recover the refrigerant according to EPA Section 608 regulations before dismantling the unit C) Ignore refrigerant handling because it is not a demolition hazard D) Transfer the refrigerant to a nearby building for reuse without documentation Answer: B Explanation: EPA Section 608 requires proper recovery and documentation of refrigerants to prevent ozone-depleting emissions.
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Question 50. Which of the following is a required feature of a fall protection guardrail system on a demolition site? A) Must be painted bright orange for visibility B) Must be able to withstand a 200-lb load applied horizontally at any point along the top rail C) Must be installed only on the exterior of the building D) Must be removable within 24 hours of installation Answer: B Explanation: OSHA specifies that guardrails must support a 200-lb horizontal load without failure. Question 51. When a demolition crew is required to work in a confined space such as a basement, the entry procedure must include: A) Continuous atmospheric monitoring for oxygen, combustible gases, and toxic vapors B) Only a verbal check-in with the supervisor before entry C) No special procedures if the space is larger than 10 ft × 10 ft D) Allowing workers to enter without a rescue plan if the space is dry Answer: A Explanation: Confined-space entry must include atmospheric testing and a rescue plan per OSHA. Question 52. Which of the following best describes the “focus-four” hazard of electrocution in demolition? A) Contact with live electrical conductors during utility disconnection B) Falling from ladders while working near power lines C) Being struck by falling steel beams D) Inhaling toxic fumes from burning insulation Answer: A Explanation: Electrocution hazards arise from contact with energized conductors, especially during utility work.
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Question 56. In the Indianapolis demolition permit, the required “public notice” period before demolition begins is: A) 24 hours B) 48 hours C) 7 days D) 30 days Answer: C Explanation: The city mandates a 7-day public notice to inform neighboring property owners of upcoming demolition. Question 57. Which of the following best explains why a demolition crew would use a “hydraulic breaker” instead of a jackhammer on concrete? A) Hydraulic breakers are quieter. B) Hydraulic breakers can produce higher impact energy with less operator fatigue. C) Jackhammers are prohibited on demolition sites. D) Hydraulic breakers require no PPE. Answer: B Explanation: Hydraulic breakers deliver greater impact energy efficiently, reducing operator fatigue and increasing productivity. Question 58. When an asbestos removal contractor must transport ACM waste off-site, the manifest must include: A) The waste generator’s name, the waste type, and the destination facility’s EPA ID number B) Only the total weight of the waste C) The GPS coordinates of the demolition site D) The contractor’s driver's license number Answer: A Explanation: EPA regulations require a detailed manifest that lists generator, waste description, and disposal facility identification.
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Question 59. Which of the following is an OSHA-required inspection frequency for scaffolding on a demolition site? A) Before each shift and after any alteration or accident B) Monthly only C) Annually D) Only when a worker reports a problem Answer: A Explanation: OSHA requires scaffolding to be inspected before each shift and after any change or incident. Question 60. During demolition, a “soft-landing” system is used to: A) Reduce noise during equipment operation B) Control the descent of a falling structural element to prevent damage to the ground and workers C) Provide a cushion for workers who fall from heights D) Store debris in a compressed form for easier removal Answer: B Explanation: Soft-landing systems (e.g., airbags, hydraulic cushions) manage the impact of falling elements. Question 61. Which of the following best describes the “hazard communication” label requirement for a drum of solvent used for cleaning metal parts on site? A) The label must include the product name, hazard pictograms, signal word, and precautionary statements. B) Only the product name is required. C) The label can be omitted if the solvent is stored in a locked cabinet. D) A handwritten note is acceptable if the SDS is on file. Answer: A Explanation: OSHA’s HazCom standard requires full labeling with pictograms, signal word, and precautionary statements.
