OSHA 30 Practice Test

1. A worker is preparing to walk near a stairway floor opening that is temporarily unguarded during construction. Which control would most directly protect against a fall through that opening?

• A. A secured cover or guardrail system installed over or around the opening
• B. A hard hat worn by every worker who walks within 10 feet of the opening
• C. A tag identifying which general contractor is responsible for the opening
• D. A single verbal reminder given once during the morning safety meeting

2. A fall protection plan permits a worker's personal fall arrest system to allow a longer free fall distance than generally recommended before the deceleration device engages. What is the primary danger this creates?

• A. A harness that becomes noticeably more comfortable to wear during ordinary work tasks
• B. Higher arrest forces and a greater risk that the worker strikes a lower level or object before the system fully arrests the fall
• C. An anchorage point that experiences a measurably reduced load throughout the entire duration of the fall event, because the connecting device is assumed to absorb all of the energy by itself
• D. A connecting device that becomes significantly easier to inspect once a fall has occurred

3. A crew is erecting precast concrete panels and a worker must temporarily work from an unprotected leading edge before permanent guardrails are installed. Which combination best reflects a layered approach to managing this fall exposure?

• A. Rely solely on a verbal caution given once to nearby workers on the crew
• B. Wait until the very end of the shift before installing any protection at all
• C. Use only hard hats on the crew, on the reasoning that the leading-edge work itself is only temporary in nature this week
• D. Combine a personal fall arrest system with a documented, site-specific fall protection plan for the leading-edge task

4. A safety net is being installed below a steel erection work area as fall protection. What is the primary function this net is intended to serve?

• A. To collect falling tools and debris exclusively, with absolutely no role in catching a falling person
• B. To catch a falling worker and limit injury when other fall protection is not feasible for the task
• C. To eliminate the need for any harness anywhere else on the same job site
• D. To serve as an approved walking surface for workers moving between work areas

5. A worker is connected to a personal fall arrest system while working near a roof edge. Which combination of components makes up a complete personal fall arrest system?

• A. An anchorage, a full-body harness, and a connecting device such as a lanyard or deceleration device
• B. A hard hat, a pair of tinted safety glasses, and a set of steel-toe work boots issued to the crew
• C. A guardrail system, a toe board, and a warning line system
• D. A straight ladder, a stepladder, and an extension ladder

6. A safety manager is evaluating whether an anchor point for a personal fall arrest system is adequate for a single worker. What is a commonly used minimum strength benchmark for a non-engineered anchorage?

• A. 250 pounds per attached worker, roughly the strength rating for a lanyard's D-ring alone
• B. 1,000 pounds per attached worker, roughly the maximum arresting force figure doubled
• C. 5,000 pounds per attached worker
• D. 500,000 pounds per attached worker, a rating reserved for heavy crane rigging hardware

7. A low-slope roofing crew is working a safe distance behind a warning line but a task requires one worker to move into the area between the warning line and the roof edge. What must accompany a warning line system used this way?

• A. Nothing else is required at all, regardless of how close the actual work being performed gets to the roof's unprotected edge on that particular side of the building
• B. Workers must stay behind the warning line, with additional protection generally required for any work performed between the line and the roof edge
• C. A safety net installed below the entire roof, fully replacing the warning line system
• D. A personal fall arrest system for every worker on the roof, regardless of their position on it

8. A guardrail system is being installed along the edge of a scaffold platform. What is the standard height range required for the top rail above the working surface?

• A. Exactly 36 inches, with a strict zero-inch tolerance allowed by the standard
• B. 38 to 40 inches, matching the general industry stair rail height range
• C. 30 to 34 inches, the grandfathered stairrail height for older installations
• D. Approximately 42 inches, within a permitted range of about 39 to 45 inches

9. A supervisor is deciding who may inspect and approve the fall protection system used on a steel erection project. What qualification should that individual hold?

• A. Any worker who has simply completed the general OSHA 10-hour construction awareness course at some earlier point
• B. The lowest-seniority worker on the crew, assigned specifically to build their experience
• C. A designated competent person with the knowledge and authority to identify fall hazards and correct them
• D. An outside equipment vendor who originally sold the fall protection gear

10. A framing crew is working on an elevated floor with unprotected edges. At what general height in construction work does fall protection typically need to be provided?

• A. 4 feet above the lower level, the general industry trigger height rather than construction's
• B. 6 feet above the lower level
• C. 10 feet above the lower level, the clearance distance used for crane power line work instead
• D. 15 feet above the lower level, a threshold construction fall protection does not actually use

11. A contractor sets up a warning line using rope rated at 300 pounds tensile strength, flagged every 10 feet, at a height of 30 inches. Does this warning line meet OSHA's criteria?

• A. Yes, all three specifications meet or exceed the minimum requirements for a warning line
• B. No — the rope must have a minimum breaking strength of 500 pounds, flagging must occur at intervals of 6 feet or less, and the line height must be 34 to 39 inches above the walking surface
• C. Yes, because only the flagging interval is actually regulated by the standard; rope tensile strength and mounting height are both left entirely to the individual contractor's own discretion
• D. No, but only the flagging interval fails; the rope strength and height described both actually meet the standard

12. A worker is exposed to a wall opening where the outside bottom edge is 6.5 feet above the ground and the inside bottom edge of the opening is 30 inches above the walking surface. Does this opening require fall protection under the wall opening provision?

• A. Yes — protection is required because the outside edge is 6 feet or more above a lower level and the inside edge is less than 39 inches above the walking surface
• B. No, because the inside edge must be less than 20 inches, not 30 inches, to trigger the wall opening rule
• C. No, because wall openings are only regulated when the outside drop exceeds 15 feet
• D. Yes, but only because the opening happens to face a nearby excavation, a factor that is actually completely unrelated to the real wall opening threshold that governs here

13. A safety net is being positioned below a steel erection deck where a worker could fall up to 12 feet before reaching the net level. How far must the net extend horizontally beyond the edge of the potential fall, and how far below the working level can it be installed?

• A. 6 feet of horizontal extension only, and the net may be installed no more than 20 feet below the actual working level
• B. 8 feet of horizontal extension regardless of fall distance, installed at any depth below the working level
• C. 13 feet of horizontal extension for a fall distance over 10 feet, installed no more than 30 feet below the working level
• D. 20 feet of horizontal extension for any fall distance, installed no more than 50 feet below the working level

14. A jobsite noise survey finds that workers are exposed to an average of 87 decibels over an 8-hour shift. Under 29 CFR 1926.52's construction noise table, is this level itself already a violation requiring hearing protection?

• A. Yes, because 87 dBA exceeds a formal 85-decibel action level that by itself triggers mandatory annual audiometric testing and a written hearing conservation program under the construction noise standard, mirroring the separate general industry rule
• B. Yes, because any reading above 80 dBA automatically triggers a citation, regardless of the shift length involved
• C. No, because outdoor noise readings on a construction site are never enforceable under any OSHA standard
• D. No — Table D-2 in 1926.52 permits up to 90 dBA over an 8-hour shift, so 87 dBA does not yet exceed the permissible level; hearing protection becomes mandatory only once it is not feasible to keep exposure at or below that table value

15. A crew is cutting concrete with a dry-cut saw, generating visible dust clouds. Which engineering control most directly reduces the workers' silica dust exposure?

• A. Cutting for noticeably shorter stretches of time while still using a completely dry blade throughout
• B. Using water suppression or a saw equipped with local exhaust ventilation to capture dust at the source
• C. Standing farther away from the saw only during the single loudest part of the cut
• D. Increasing the blade's cutting speed so the task finishes more quickly overall

16. A worker on a hot jobsite becomes confused, stops sweating, and has hot, dry skin. What condition should this presentation immediately raise concern for?

• A. A minor case of heat rash that requires absolutely no further action beyond simply noting it
• B. Ordinary fatigue from a long shift, resolved simply by taking a short scheduled break
• C. Heat stroke, a life-threatening emergency requiring immediate cooling and medical attention
• D. Mild dehydration requiring only a small sip of water before returning to work

17. A worker is about to use a new chemical adhesive delivered to the jobsite for the first time. Where should the worker look to learn about its hazards and recommended protective measures?

• A. The product's safety data sheet and container label
• B. The manufacturer's glossy marketing brochure describing the product's general benefits
• C. The delivery truck's shipping manifest, which lists weights and delivery destinations
• D. A general internet search unrelated to the specific product actually delivered

18. A worker must repeatedly lift heavy bags of concrete mix from ground level throughout the shift. Which technique reduces the risk of a back injury during this task?

• A. Bending only at the waist while keeping both legs completely straight the entire time to save effort
• B. Twisting the torso quickly while holding the concrete bag well away from the body
• C. Lifting each bag as fast as possible so that total time spent under load is minimized
• D. Bending at the knees, keeping the load close to the body, and avoiding twisting while lifting

19. A demolition crew is removing old painted materials that may contain lead. Which hygiene practice most directly reduces the risk of workers ingesting lead dust?

• A. Eating lunch directly inside the active demolition area itself in order to save valuable travel time each and every day
• B. Wearing gloves only while eating, without washing the hands underneath them first
• C. Washing hands and face thoroughly before eating, drinking, or smoking, and not eating in the contaminated work area
• D. Blowing dust off the work clothing with compressed air just before each scheduled break

20. A worker must enter a below-grade vault to connect utility conduit. Air testing confirms oxygen level and the absence of flammable or toxic gases before entry. Why is this pre-entry testing essential even though the space appears open and accessible from above?

• A. Testing is only a formality, since a careful visual inspection reliably detects atmospheric hazards
• B. Confined or enclosed spaces can accumulate oxygen-deficient or toxic atmospheres that are invisible and undetectable without instruments, even when the space looks normal
• C. Testing is treated as legally required only for permit spaces that happen to be deeper than 100 feet below the surrounding grade level, a depth-based rule found nowhere in the confined space standard itself
• D. Testing becomes unnecessary once the space has been ventilated one time in the past

21. A welder is working in a poorly ventilated enclosed area, producing visible metal fumes. What is the primary health concern driving the need for local exhaust ventilation or respiratory protection in this situation?

• A. Inhalation of metal fumes can cause acute and long-term respiratory and systemic health effects
• B. The fumes are primarily considered a fire risk, with essentially no inhalation concern involved at all
• C. The fumes pose only a cosmetic staining issue for nearby surfaces and equipment
• D. The fumes are a concern only for their unpleasant smell, with no real underlying health effect

22. A cleanup crew wants to dry-sweep visible silica-containing dust off a slab rather than use a HEPA vacuum. What does the silica standard say about this method?

• A. Dry sweeping is always considered the single preferred cleanup method, because it removes visible surface dust the fastest of any available method on site every time
• B. Dry sweeping is permitted without restriction as long as workers wear a basic dust mask
• C. Dry sweeping or dry brushing is not allowed where it could contribute to exposure, unless wet sweeping, HEPA vacuuming, or another effective method is not feasible
• D. Dry sweeping is banned outright with no exception recognized under any circumstance

23. Air sampling on a lead abatement task shows a worker's 8-hour time-weighted average exposure at 35 micrograms of lead per cubic meter of air. Where does this result place the worker relative to the construction lead standard's action level and permissible exposure limit?

• A. Below both the action level and the permissible exposure limit
• B. Above the permissible exposure limit but below the action level, a combination the standard does not actually address
• C. At exactly the permissible exposure limit, which the standard also sets at 35 micrograms per cubic meter
• D. Above the 30 µg/m3 action level but below the 50 µg/m3 permissible exposure limit

24. A crew uses powder-actuated fastening tools that produce sharp impulse noise rather than continuous sound. What peak sound pressure level should this impulsive noise not exceed?

• A. 90 dB, the same figure used for continuous 8-hour sound level exposure
• B. 115 dB peak, matching the shortest-duration row on the continuous noise table
• C. 140 dB peak sound pressure level
• D. 200 dB peak, since impulse noise is treated as exempt from any numeric limit

25. A worker has been required by the silica standard to wear a respirator for 45 days over the past 12 months because of tasks not on Table 1. Does this trigger the standard's medical surveillance requirement?

• A. Yes — medical surveillance is required once a worker is required to use a respirator under this standard for 30 or more days in a year
• B. No, medical surveillance under this standard only ever applies to workers exposed above the action level for an entire calendar year
• C. No, 45 days is actually below the 90-day threshold the silica standard uses for this trigger
• D. Yes, but only after the worker has completed 5 consecutive years performing silica-generating tasks

26. Initial air monitoring under the silica standard's scheduled monitoring option shows a worker's exposure above the PEL. How often must follow-up monitoring occur after that result, compared to a result below the PEL?

• A. Every 12 months on a fixed schedule set well in advance, regardless of whether the sampled result came back above or below the actual permissible exposure limit
• B. Every 3 months following a result at or above the PEL, versus every 6 months following a result at or below the PEL but at or above the action level
• C. Monitoring stops entirely once a single sample has been taken, regardless of the result
• D. Every 30 days following any result at all, whether above or below the PEL

27. Which practice best demonstrates the hierarchy of controls concept when addressing a jobsite hazard?

• A. Relying exclusively on a single warning sign posted near the hazard's exact location
• B. Issuing personal protective equipment as the first and only response to any newly identified hazard on site
• C. First attempting to eliminate or engineer out the hazard before relying on PPE or administrative controls
• D. Training workers to simply walk around the hazard each shift without changing it in any way

28. A general contractor manages several subcontractors on one site and wants to coordinate hazard controls across all trades. What is this coordination role commonly called?

• A. Competent person for excavation, limited to inspecting trench conditions on that one task
• B. Qualified electrician, limited to work on energized circuits and electrical panels
• C. Authorized entrant, limited to a single permit-required confined space entry
• D. Controlling employer, responsible for coordinating safety across the multi-employer site

29. A safety manager wants to identify hazards on a jobsite before they cause an injury. Which activity best represents proactive hazard identification rather than reactive investigation?

• A. Conducting a job hazard analysis before a new task begins
• B. Reviewing the OSHA 300 recordkeeping log from the previous calendar year
• C. Interviewing an injured worker shortly after they suffered a fall from height
• D. Reading through the incident report a subcontractor has already filed

30. Which of the following best describes the purpose of worker participation in a jobsite safety and health program?

• A. Workers are kept out of hazard discussions entirely to limit the company's liability
• B. Workers contribute frontline knowledge of hazards and help shape practical controls
• C. Workers vote among themselves on which brand of PPE the company should purchase
• D. Workers sign attendance forms confirming they sat through a scheduled toolbox talk

31. After a scaffold collapse injures two workers, the investigation team wants to find the true underlying cause rather than just the immediate trigger. Which approach fits this goal?

• A. Closing the investigation once the crew's foreman has been formally disciplined for it
• B. Assigning blame directly to the worker who happened to be on the scaffold at the time
• C. Stopping the investigation entirely as soon as the single broken scaffold component is first identified by anyone
• D. Asking why repeatedly to trace the failure back through the decisions and conditions that allowed it to happen

32. A safety program has excellent written procedures, but injury rates have not improved over three years. Which program evaluation practice would most likely reveal why?

• A. Reprinting the same written procedures in a noticeably larger, easier-to-read font size
• B. Auditing whether procedures are actually followed in the field and revising controls based on the findings
• C. Requiring every worker to reread the identical procedures once a year with no field discussion
• D. Increasing the total page count of the written manual without auditing whether its procedures are followed in the field

33. During a safety program review, a supervisor learns that workers rarely report near-misses even though a formal reporting system exists. What underlying management issue does this most likely point to?

• A. The crew genuinely experiences too few close calls in a typical month to generate any reports
• B. Workers cannot distinguish a genuine near-miss from a hazard already reported last month
• C. Employees lack confidence that reports won't lead to blame or discipline
• D. The reporting form requires more than two supervisor signatures before it can be submitted

34. A contractor is building a written safety and health management program for a mid-size construction firm. Which element should serve as the foundation that every other program element depends on?

• A. A quarterly raffle that rewards the crew with the fewest recorded injuries that quarter
• B. Visible management commitment and leadership involvement in safety
• C. A recurring poster campaign reminding workers in general terms to be careful
• D. A signed safety pledge card every new hire completes on their first day on site

35. OSHA's Recommended Practices for Safety and Health Programs describes several core elements a construction safety program should include beyond management commitment. Which pairing below reflects two of those additional core elements?

• A. Worksite hazard identification and assessment, paired with education and training
• B. A company logo redesign, paired with a quarterly safety-themed employee cookout
• C. A single annual safety poster campaign, paired with a suggestion box reviewed once a year
• D. A company dress code policy, paired with a mandatory uniform color scheme for all crews

36. A laborer with no crane experience asks to operate a tower crane for an afternoon because the regular operator called in sick. Under 1926.20(b)(4), what governs whether this is permitted?

• A. It is permitted as long as the laborer signs a written liability waiver before starting that particular shift's work
• B. It is permitted for any task expected to last less than four hours total
• C. Only employees qualified by training or experience may be permitted to operate equipment and machinery
• D. It is permitted if a supervisor verbally authorizes the substitution on short notice

37. A new hire on a framing crew has never worked construction before. What does 1926.21(b)(2) require the employer to do before assigning this worker to tasks with recognizable hazards?

• A. Provide only a written handbook, with no verbal instruction required at all
• B. Wait 90 days of employment before providing any hazard-recognition training
• C. Rely entirely on the worker's own personal initiative to ask questions about hazards whenever they happen to arise on the job
• D. Instruct the employee in the recognition and avoidance of unsafe conditions applicable to their work environment

38. A worker dies in a scaffold collapse on a Friday afternoon. Within what timeframe must the employer report the fatality to OSHA?

• A. 72 hours after the employer learns of the work-related fatality, matching the environmental spill reporting window
• B. Only if a state OSHA plan specifically requires it, since federal OSHA does not itself require fatality reporting
• C. 8 hours after the employer learns of the work-related fatality
• D. 5 business days, matching the deadline typically used for filing a workers' compensation claim

39. A safety program grants every worker the authority to halt a task the moment they identify an imminent hazard, without needing supervisor approval first. What safety-management principle does this reflect?

• A. Progressive discipline, since this kind of policy primarily exists to formally punish unsafe worker behavior only after it has already occurred
• B. Behavior-based safety observation, which only tracks statistics without changing anyone's actual authority
• C. Empowering worker participation so hazard control does not wait on a chain-of-command delay while exposure continues
• D. Regulatory compliance with a specific OSHA standard that mandates a written stop-work authority policy

40. A worker performing overhead work is also exposed to a risk of incidental contact with low-voltage electrical conductors. What feature should their head protection include beyond basic impact resistance?

• A. An electrical insulation rating appropriate for the voltage exposure, in addition to standard impact protection
• B. A bright, high-visibility color coating applied to the shell, with no additional protective rating
• C. An adjustable chin strap for a more secure fit, with no electrical rating involved at all
• D. A built-in ventilation cooling vent molded into the shell, with no additional protective rating attached to it at all

41. Before assigning PPE to a construction crew for a new task, what should the employer do first to select appropriate equipment?

• A. Conduct a hazard assessment of the task to identify the specific hazards the PPE must address
• B. Order whatever PPE happens to be least expensive and available in the very largest bulk quantity
• C. Ask each worker to bring whatever protective equipment they already happen to own from home
• D. Select PPE based solely on what the previous, unrelated job happened to use

42. A worker is grinding metal, producing sparks and small flying particles. What type of eye or face protection is appropriate for this task?

• A. Standard prescription eyeglasses that have been fitted with no side shields of any kind attached at all
• B. A pair of sunglasses originally purchased for general outdoor summer use
• C. Safety glasses or goggles with side protection, or a face shield for higher-intensity grinding work
• D. No eye protection at all, on the reasoning that heavy-duty gloves are considered sufficient

43. An employer requires a worker to wear a tight-fitting respirator for a task involving airborne dust. Beyond simply issuing the respirator, what else is generally necessary to ensure it protects the worker?

• A. Nothing further at all, since any respirator simply marked with the correct size fits any wearer equally well
• B. Only a purchase receipt confirming the respirator was bought from an approved vendor
• C. A one-time demonstration by a coworker, without any formal fit testing being performed
• D. A proper fit test along with training on how to wear, inspect, and maintain the specific respirator model

44. A worker will be handling sharp metal lath while an electrician nearby is working with low-voltage control wiring. Should the same glove be used for both tasks?

• A. Yes, any general-purpose leather work glove provides fully adequate protection for both of these very different kinds of tasks performed side by side on the same crew
• B. No, gloves should be selected for the specific hazard, such as cut-resistant gloves for sharp materials and insulated gloves rated for electrical work
• C. Yes, since all gloves on the market provide an identical level of protection against any hazard
• D. No, but only because gloves happen to be manufactured in different colors for different trades

45. A worker is regularly exposed to high noise levels from pneumatic tools throughout the workday. What type of PPE is designed to address this specific exposure?

• A. A dust mask that is rated only for protection against airborne particulates in the air
• B. Steel-toe boots rated for protection against dropped-object impact on the feet
• C. Hearing protection, such as earplugs or earmuffs, rated for the noise level encountered
• D. Cut-resistant gloves rated for protection against sharp material edges during handling

46. A site relies heavily on respirators to control worker exposure to silica dust generated continuously by a stationary saw, without evaluating engineering controls like water suppression or local exhaust ventilation. What is the main limitation of this approach?

• A. Respirators automatically capture dust directly at the saw blade itself before it ever has any chance to become airborne at all
• B. Respirators eliminate the need for any future silica exposure monitoring on that task entirely
• C. Respirators are more effective than engineering controls at actually reducing dust generation
• D. PPE alone depends on consistent, correct use and does nothing to reduce the amount of hazardous dust generated at the source

47. A safety manager is verifying that the hard hats purchased for a crew comply with the construction head protection standard. Which consensus standard editions does the regulation recognize as acceptable?

• A. Only the single most recent edition of ANSI Z89.1 in effect at the time of purchase
• B. ANSI Z89.1-1997, ANSI Z89.1-2003, or ANSI Z89.1-2009
• C. ISO 3873, the international head protection standard, used exclusively
• D. There is no recognized consensus standard; any helmet marketed as a hard hat satisfies the rule

48. 1926.95(a) describes the trigger for when an employer must provide protective equipment. What kind of injury pathway does this trigger cover?

• A. Only hazards that have already caused a specific, formally documented injury report on that exact jobsite at some earlier point during the current project
• B. Only chemical burns resulting from direct skin contact with a substance
• C. Only impact injuries caused by falling objects striking a worker
• D. Any hazard capable of causing injury or impairment through absorption, inhalation, physical contact, or other exposure route encountered in the normal course of employment

49. A worker prefers to wear their own steel-toe boots rather than employer-issued ones. If the employer permits this, what obligation does the employer still have regarding those boots?

• A. The employer remains responsible for ensuring the employee-owned boots are adequate, including proper maintenance and sanitation
• B. None — once a worker chooses to use personal equipment, the employer has no further responsibility for it
• C. The employer must reimburse the worker for the full original purchase price of the boots
• D. The employer must replace the boots with employer-issued ones within exactly 30 calendar days, regardless of their actual current condition

50. Which consensus standard editions does the eye and face protection rule recognize for compliant devices?

• A. ANSI/ISEA Z87.1-2010, ANSI Z87.1-2003, or ANSI Z87.1-1989 (R-1998)
• B. ISO 4007, used exclusively with no domestic ANSI alternative recognized
• C. ANSI Z89.1, the same consensus standard used for head protection rather than eyewear
• D. Only ANSI/ISEA Z87.1-2010, with no older editions accepted under any circumstance

51. A worker performing shielded metal-arc welding needs a filter lens with the correct shade number to protect against the arc's light radiation. Roughly what shade number does OSHA's Table E-1 associate with this type of welding?

• A. Shade 10
• B. Shade 2, the same light tint used for general outdoor sun glare
• C. Shade 1, the lightest tint the filter lens table lists at all
• D. No specific shade is assigned; any tinted lens is acceptable for shielded metal-arc welding

52. A worker wears safety glasses with no side shields while operating a chop saw that throws debris from multiple angles. What does the eye and face protection standard say about this setup for a flying-particle hazard?

• A. It is adequate, since front lens coverage alone is the only requirement for any cutting task
• B. It is adequate only if the worker also briefly closes their eyes during each individual cut
• C. It is inadequate, but only because the lenses must be specially tinted for bright outdoor glare protection, not because of any missing side protection at all
• D. It is inadequate — where flying-object hazards exist, side protection such as clip-on or slide-on side shields is required in addition to the basic lens

53. An operator is using heavy earthmoving equipment equipped with a rollover protective structure and seat belt. Why is wearing the seat belt essential even with the rollover structure in place?

• A. The seat belt keeps the operator within the rollover protective structure's zone of protection if the equipment tips or rolls over
• B. The seat belt is intended only to prevent minor bumps and jostling while driving on flat, smoothly paved work surfaces around the yard
• C. The seat belt's actual function is to reduce engine noise reaching the operator's seat
• D. The seat belt is purely a comfort feature that provides no real safety function at all

54. A ground worker is directed to stay clear of the rear swing radius of an excavator operating on a jobsite. Why is this exclusion zone necessary?

• A. The exclusion zone exists solely to reduce equipment noise exposure levels for nearby ground crews working close by
• B. The exclusion zone keeps windblown jobsite dust from settling on nearby workers' clothing
• C. The rotating counterweight and rear of the machine can strike or crush a worker who is not visible to the operator
• D. The exclusion zone exists only to protect the machine's exterior paint finish from scrapes

55. Workers are performing tasks on multiple levels of scaffolding stacked above each other. Which control most directly reduces the risk of a lower-level worker being struck by falling tools or debris from above?

• A. Requiring every worker on the site to wear steel-toe boots at all times during the shift
• B. Installing toe boards, screens, or debris nets along the edges of the upper platforms
• C. Scheduling lunch breaks so the two scaffold levels overlap by roughly ten minutes
• D. Posting a general sign near the scaffold base warning of the falling-object risk

56. A dump truck must back up in an active work area with limited visibility behind the vehicle. Which combination of controls best reduces the struck-by risk to workers on foot?

• A. Relying entirely on the truck's factory-installed side mirrors as the operator's only available visibility aid
• B. Having nearby workers listen for engine noise to estimate the truck's current position
• C. Painting the rear bumper a bright, high-visibility color scheme for the whole fleet
• D. A functioning backup alarm combined with a trained spotter who can see the path and communicate with the driver

57. An excavation crew is digging a trench for a utility line. At what general depth does a protective system, such as sloping, shoring, or a trench shield, typically become necessary to guard against cave-ins?

• A. 1 foot or greater, applied the same way in every case regardless of the soil type present
• B. 20 feet or greater, and only once the excavation reaches that much greater depth
• C. Only when the trench's total length exceeds 50 feet, regardless of how deep it is
• D. 5 feet or greater, unless the excavation is made entirely in stable rock

58. Masonry blocks are being stacked at a jobsite storage area. Which practice most directly reduces the risk of the stack toppling onto a worker?

• A. Stacking the blocks on a sloped surface so that rainwater is able to drain away freely
• B. Stacking the blocks as high as physically possible in order to maximize the available floor space on site today
• C. Stacking materials on a stable, level surface and limiting stack height according to the material's stability
• D. Leaning the entire stack against a nearby chain-link fence for extra lateral support

59. A crew is guiding a suspended load into position using tag lines rather than pushing it with their hands. What hazard does this practice primarily reduce?

• A. The risk of the crane's engine overheating during an unusually long, extended overhead lift sequence on a hot afternoon
• B. The risk of a worker being struck by or caught between the load and a fixed object while trying to control it by hand
• C. The requirement that the crane operator hold a valid, currently unexpired operating license
• D. The chance that the suspended load remains visible to nearby vehicle traffic passing by

60. A deep trench is suspected of having a hazardous atmosphere because of nearby underground utilities such as gas lines. What must occur before workers enter?

• A. Testing the atmosphere and providing appropriate protection, such as ventilation, before entry
• B. Entry may proceed immediately in every case, since trenches are always assumed open to fresh air
• C. Only the trench walls need inspection before entry; the surrounding air does not
• D. Atmospheric testing is only required in trenches deeper than 50 feet below grade

61. A competent person is choosing between sloping the trench walls and using a trench shield for a deep excavation with limited surrounding space. What factor most influences this decision?

• A. Only the paint color of whichever excavation equipment happens to be on site that day
• B. Whichever protective method happens to generate the smallest amount of paperwork for the crew to complete that particular afternoon
• C. Available space, soil type and stability, and whether the chosen method provides protection equivalent to a properly designed system
• D. The rental equipment company's preference, regardless of the actual soil conditions found on site

62. A competent person classifies excavated soil as Type C, the least stable classification, and plans to slope the trench walls rather than use a shield or shoring. What is the maximum allowable slope for Type C soil under the standard's basic sloping option?

• A. A vertical cut with no slope at all, since Type C soil requires only warning signage instead
• B. 1.5 horizontal to 1 vertical, roughly 34 degrees measured from horizontal
• C. 3 horizontal to 1 vertical, roughly 18 degrees measured from horizontal
• D. A vertical cut of exactly 90 degrees is permitted as long as a trench shield sits nearby but undeployed

63. A trench is 5 feet deep and 90 feet long. How many ladders or other means of egress are needed so that no worker is more than the maximum allowed lateral travel distance from an exit?

• A. None are required unless the trench exceeds 100 feet in total length
• B. One exit is considered sufficient regardless of the trench's total length, once the trench first reaches just 4 feet in overall depth
• C. Enough exits so that no worker must travel more than 25 feet laterally to reach one, since the trench is 4 feet deep or more
• D. Exits are only required at trenches deeper than 8 feet, regardless of how long the trench is

64. Excavated soil is being piled directly at the lip of an open trench as digging continues. What is the required minimum setback for this spoil pile from the edge of the excavation?

• A. There is no minimum setback required as long as the spoil pile is under 3 feet tall
• B. At least 2 feet from the edge of the excavation
• C. At least 10 feet from the edge of the excavation, matching the crane power line clearance distance
• D. At least 25 feet from the edge, the same distance used for trench means-of-egress spacing

65. A worker is climbing a straight ladder while carrying a small tool bag. What climbing practice should the worker maintain throughout the climb?

• A. Carrying tools in both hands while climbing up the rungs as quickly as physically possible on every single trip up and down the ladder
• B. Facing away from the ladder while descending in order to see the ground below better
• C. Maintaining three points of contact with the ladder at all times, using a tool belt or hoisting line instead of carrying items by hand
• D. Skipping every other rung of the ladder in order to complete the climb more quickly

66. A temporary stairway is being used by workers to move between floors during a multi-story building's construction, and it has several risers with at least one side open. What is generally required to protect workers using this stairway?

• A. Nothing at all, since the stairway's purely temporary status exempts it from the rule
• B. A single warning sign posted only at the very bottom step of the stairway
• C. A stair rail system or handrail installed along the open side of the stairway
• D. A length of rope stretched loosely across the top of the stairway's opening

67. A worker is setting up an extension ladder against a wall to access a roof. What general rule helps establish a safe climbing angle for the ladder's base distance from the wall?

• A. Positioning the base about one foot away from the wall for every four feet of height to the upper support point
• B. Positioning the base of the ladder directly flush against the wall surface with absolutely no offset distance at all
• C. Positioning the base as far from the wall as physically possible, regardless of the ladder's actual height
• D. Positioning the base at a fixed 10-foot distance from the wall no matter how long the ladder is

68. A worker sets up an extension ladder to access a roof edge for maintenance work. How far should the ladder's side rails extend above the point where the worker will step off onto the roof?

• A. Exactly level with the stepping-off point, with no extension of any kind whatsoever ever permitted above it
• B. At least 10 feet above the stepping-off point, well beyond the actual required extension
• C. About 6 inches above the stepping-off point, just enough for the rail to remain visible
• D. At least 3 feet above the stepping-off point, or secured with an equivalent means of support at the top

69. A worker weighing 210 pounds plans to carry a 40-pound bag of tools up a stepladder. What should the worker verify about the ladder before use to ensure it can safely support the combined load?

• A. That the ladder happens to be painted in a bright, easily visible color
• B. That the ladder's duty rating, or maximum load capacity, exceeds the combined weight of the worker and everything they are carrying
• C. That the ladder was manufactured within the past calendar year, regardless of its actual rated load capacity number printed on its side rail
• D. That the ladder has the same number of rungs as whichever ladder happened to be used previously

70. Before using a ladder each day, what should a worker check for as part of a basic pre-use inspection?

• A. Cracked, bent, or corroded rails and rungs, loose or missing hardware, and whether the safety feet are intact
• B. Only whether the manufacturer's logo printed on the ladder's side rail is still clearly legible from a distance today
• C. Only whether the ladder's paint color still matches the company's branding scheme
• D. Only whether the ladder happened to be used yesterday without any reported incident

71. A pre-use inspection finds a portable ladder with a visibly split side rail. What must happen to this ladder under the inspection and defect provisions of the ladder standard?

• A. It may keep being used until the end of the current shift, then be pulled from service afterward
• B. It may be used by lighter workers only, since a split rail reduces but does not eliminate its capacity
• C. It must be repainted to visually hide the damage before allowing any further use
• D. It must be tagged 'Do Not Use' or otherwise marked defective and withdrawn from service immediately

72. A handrail on a stairway is installed 25 inches above the tread surface. Does this meet the handrail height requirement?

• A. Yes, any height under 30 inches is acceptable for a stairway handrail
• B. No — a handrail must be not more than 37 inches and not less than 30 inches above the tread surface, so 25 inches is too low
• C. Yes, because handrail height is only actually regulated for permanent stairways, and never for temporary construction stairs
• D. No, but only because 25 inches is too high; the actual maximum allowed is 20 inches

73. A temporary stairway used during construction has 5 risers and rises 34 inches, with one side unprotected by any wall. Does this stairway require a stair rail system and handrail under the stairway standard?

• A. No, because the standard's trigger is 6 or more risers, and this stairway only has 5
• B. No, because the 30-inch rise threshold described in the rule has not actually been exceeded
• C. It depends entirely on the stairway's total width measured in feet, a factor the stairway standard does not actually specify, define, or regulate anywhere in its text
• D. Yes — stairways with 4 or more risers, or rising more than 30 inches, whichever occurs first, require at least one handrail and a stairrail system on each unprotected side

74. A manufacturer rates a self-supporting portable ladder's maximum intended load at 250 pounds. Under the ladder standard's basic strength requirement, approximately what total load must the ladder actually be able to support before failing?

• A. At least four times the maximum intended load, or about 1,000 pounds
• B. Exactly the maximum intended load, with no additional safety margin required at all
• C. Twice the maximum intended load, or about 500 pounds
• D. Ten times the maximum intended load, or about 2,500 pounds

75. An inspector measures the risers on a temporary plywood stairway and finds variations of up to 3/4 inch between individual risers. Does this meet the uniformity requirement for stairway construction?

• A. No — variations in riser height or tread depth may not exceed 1/4 inch within the stairway
• B. No, but only because the treads themselves were not measured; riser height alone is unregulated
• C. Yes, riser height is not regulated at all as long as the stairway's total height is correct
• D. Yes, because 3/4 inch falls within the standard's stated 1-inch riser tolerance

76. A worker stands on the top step (the very top cap) of a stepladder to reach a ceiling junction box, rather than the highest step designed for standing. Does the ladder standard permit this?

• A. No — the top or top step of a stepladder shall not be used as a step
• B. Yes, as long as the worker maintains three points of contact while standing there
• C. Yes, provided the stepladder itself is rated Type 1A extra-heavy-duty
• D. No, but only for stepladders taller than 10 feet; shorter stepladders have no such restriction

77. An electrician must service a de-energized panel that could be accidentally re-energized by another worker. What control is specifically designed to prevent that panel from being turned back on during the work?

• A. A simple verbal request asking nearby coworkers politely not to ever touch the disconnect switch at all
• B. A warning sign posted on the panel while the disconnect itself remains unlocked
• C. Closing the panel door so the disconnect appears untouched from the outside
• D. A lockout/tagout procedure that physically locks the disconnect and identifies who placed the lock there

78. A general laborer, not trained in electrical work, is asked to move materials near an open electrical panel with exposed energized parts. What is the appropriate safety approach?

• A. Allow the laborer to briefly touch the panel's bare metal frame while steadying materials nearby for just a moment there
• B. Have the laborer wear only ordinary work gloves and proceed with the task as normal
• C. Maintain the required safe approach distance and let only a qualified person work on or near the exposed energized parts
• D. Let the laborer close the panel door themselves in order to reduce their own exposure

79. An electrician is about to operate a disconnect switch on an energized high-voltage circuit and is concerned about an arc flash event rather than direct contact shock. What makes arc flash a distinct hazard from simple electrical contact?

• A. An arc flash releases intense heat, light, and pressure through the air without requiring the worker to physically touch an energized conductor
• B. Arc flash can only happen on circuits rated under 50 volts, never on higher-voltage circuits
• C. Arc flash is simply another name for an ordinary, mild static electricity shock
• D. Arc flash only occurs when a worker happens to be standing directly in a puddle of standing water on a wet, rain-soaked jobsite that day

80. Why does working with electrical tools in wet conditions substantially increase the risk of electrocution?

• A. Moisture produces no measurable change in the human body's electrical resistance at all
• B. Water forms a natural insulating barrier around the worker's entire body, blocking electrical current completely
• C. Water lowers the body's electrical resistance, making it easier for current to pass through and cause injury
• D. Wet skin makes hand tools noticeably lighter and therefore easier for the worker to control

81. A worker notices that the extension cord powering a saw has a cracked outer jacket exposing bare wire. What is the correct immediate response?

• A. Remove the cord from service and tag it out until it is repaired or replaced
• B. Cover the cracked section of the cord with duct tape and continue using the saw
• C. Keep using the cord as long as bare skin never touches the cracked section directly
• D. Wait until the end of the week to mention it at the scheduled safety meeting

82. A crane operator is planning a lift near overhead power lines on a jobsite. What is the general minimum clearance distance that should be maintained from energized overhead lines during crane operations near typical line voltages?

• A. 6 inches, since the crane's steel frame is assumed to already be adequately grounded
• B. 2 feet, matching the clearance distance typically used around ordinary scaffolding
• C. At least 10 feet, with greater clearance required as the line voltage increases
• D. No clearance is needed at all if the crane's boom is simply described as insulated

83. A contractor is setting up temporary power for portable power tools on a construction site. Which protective measure is specifically intended to reduce the risk of electrocution from a ground-fault condition in these tools?

• A. Switching every tool on the circuit to a cordless, battery-powered model instead
• B. Ground-fault circuit interrupter (GFCI) protection on the circuit
• C. Wrapping any visibly exposed section of cord with ordinary electrical tape
• D. Routing extension cords through a puddle of standing water to keep them cool

84. A crew plugs a corded drill directly into a portable generator rated at 4 kW with insulated, ungrounded circuit conductors, instead of into a GFCI-protected outlet. Is this arrangement permitted under the construction electrical standard?

• A. No, GFCI protection is required on every 120-volt receptacle on a construction site with no exceptions
• B. No, because portable generators of any size may never lawfully be used to power hand tools directly, regardless of their actual rated wattage
• C. Yes, but only if the drill itself has a built-in GFCI plug, a feature most drills lack
• D. Yes — receptacles on a portable generator rated 5 kW or less with insulated ungrounded circuit conductors are exempt from the GFCI requirement

85. A worker staples an extension cord to a wall stud to keep it out of the way. What does the electrical standard say about this practice?

• A. It is acceptable as long as the staple used does not visibly pierce all the way through the cord's outer jacket
• B. It is acceptable only for cords rated above 20 amps
• C. It is acceptable if the stapled cord is inspected weekly afterward
• D. It is prohibited — cords may not be fastened with staples, hung from nails, or suspended by wire

86. A contractor chooses to run an Assured Equipment Grounding Conductor Program instead of GFCI protection on 120-volt tools. How often must exposed cord sets and receptacles be tested under this program?

• A. Once at the very start of the project, with no further testing required afterward
• B. Every 12 months, matching the site's annual electrical system inspection cycle
• C. At intervals not exceeding 3 months for cord sets and receptacles that are exposed to damage
• D. Every 30 days regardless of whether the equipment is exposed to damage or kept in fixed, protected use

87. Extension cords supplying power tools are running directly across a heavily used walkway between two trailers. What does the standard require regarding cords in this kind of location?

• A. Nothing at all, since cords are only ever regulated at the electrical panel itself, never along walkways
• B. Cords must be dyed a bright color if they cross a walkway, with no other action required
• C. Working spaces, walkways, and similar locations must be kept clear of cords so they do not create a hazard
• D. Cords may only cross walkways if they are buried at least 6 inches below grade

88. A crew is hand-digging in an area where the exact location of underground power lines has not been confirmed. What personal protective measure does the electrical standard specifically require for this situation?

• A. Steel-toe boots rated for impact protection, since underground lines pose primarily a struck-by risk
• B. Insulated protective gloves while using the hand tools in that area
• C. A hard hat with a Class G electrical rating, since overhead contact is the primary concern here
• D. No specific PPE is required as long as a spotter is watching the excavation

89. A worker is disciplined shortly after reporting a serious hazard to OSHA. Which legal protection is most directly designed to address this situation?

• A. The right to receive prevailing wage rates under certain federal construction contracts
• B. The right to overtime pay for hours worked beyond 40 in a single workweek
• C. Whistleblower protection against retaliation for reporting a safety concern
• D. Workers' compensation benefits payable for injuries suffered on the job

90. Under OSHA, which right allows a construction worker to request a federal inspection if they believe a serious hazard exists on their jobsite?

• A. The right to choose among several employer-sponsored health insurance plans
• B. The right to file a confidential complaint requesting that OSHA inspect the jobsite
• C. The right to unionize a crew without any employer involvement in the process
• D. The right to receive full back pay for any single workday missed due to a jobsite-wide closure

91. A worker believes a specific hazard on their job is not covered by any specific OSHA standard, but the condition is clearly capable of causing serious injury. Which OSHA provision would most likely apply?

• A. The General Duty Clause, which requires employers to keep the workplace free of recognized hazards likely to cause serious harm
• B. The Hazard Communication Standard's specific container labeling requirements alone, and nothing else found anywhere in that particular standard
• C. The requirement to maintain a written respiratory protection program specifically
• D. The recordkeeping requirement to maintain the OSHA 300 injury and illness log

92. A worker refuses to perform a task, believing it exposes them to a real risk of death or serious injury with no time for OSHA to intervene. Under what narrow circumstance is this refusal generally protected?

• A. Whenever the worker simply has a personal preference not to perform whichever particular task happens to be assigned to them on that day, for any reason at all, however minor
• B. Only when a union steward is physically present to approve the work refusal in advance
• C. Whenever the same task has ever caused an injury anywhere in the construction industry
• D. When the worker has a genuine, reasonable belief in imminent danger of death or serious harm and there is not enough time for OSHA to address it through normal channels

93. Which of the following is a worker right related to hazardous chemical exposure on a construction site?

• A. The right to store personal chemical products inside the jobsite trailer for convenience
• B. The right to access safety data sheets and information about chemicals they may be exposed to on the job
• C. The right to have every single hazardous chemical entirely removed from the site immediately upon any worker's request
• D. The right to require a specific brand of chemical be substituted for one already on site

94. What is the primary purpose of the Occupational Safety and Health Administration within the U.S. Department of Labor?

• A. To provide health insurance coverage directly to construction workers
• B. To negotiate hourly wage rates specifically on behalf of local construction trade unions
• C. To set and enforce standards that protect worker safety and health in the workplace
• D. To issue local building permits before new construction projects may begin

95. A worker was disciplined two weeks after filing an OSHA complaint about exposed rebar and wants to file a retaliation complaint with OSHA. What deadline governs this filing?

• A. 180 days from the date of discipline, matching the deadline used for most other federal whistleblower statutes
• B. There is no deadline; a Section 11(c) retaliation complaint may be filed at any time after the discipline occurs
• C. 30 days from the date of the retaliatory action, under Section 11(c) of the OSH Act
• D. 60 days from the date of discipline, the same window used for most unemployment insurance appeals

96. A supervisor tells a worker that reporting a hazard directly to OSHA, instead of to the company first, is against company policy and could result in termination. Which OSHA right does this policy conflict with?

• A. The right to a fully paid consultation with an outside licensed safety engineer before any hazard report may ever be filed with anyone at all
• B. The right to report hazards directly to OSHA without going through an employer-approved internal process first, protected against retaliation
• C. The right to receive a cash bonus specifically for identifying hazards before management does
• D. The right to have the report reviewed by a union steward before OSHA is permitted to act on it

97. A worker completed OSHA's 30-hour Outreach Training Program and received a course completion card. A site superintendent tells the crew that the card licenses them to work at any height without further training. Is the superintendent correct?

• A. No — the completion card documents attendance at a voluntary hazard-recognition course; it is not a license, certification, or substitute for site-specific or standard-required training
• B. Yes, the 30-hour card functions as a federal license issued under the OSH Act that authorizes the holder to perform any construction task nationwide without further employer-provided training
• C. Yes, but only for fall-related tasks, since the card functions as a certification specific to the Focus Four fall hazard module
• D. No, because the card expires after 90 days and must be renewed through a state licensing board before it has any legal effect

98. A new worker asks where they can find contact information for filing an OSHA complaint and a summary of their basic workplace rights. Where is the employer required to make this available on the jobsite?

• A. Only in the superintendent's private office, available to workers strictly by appointment
• B. In the employer's internal payroll software system, made accessible to workers only after 90 days of continuous employment on that particular project
• C. Mailed individually to each worker's home address at the time of hire, with no jobsite posting
• D. On the 'Job Safety and Health - It's the Law' poster displayed in a conspicuous location where notices are customarily posted

99. During an OSHA compliance inspection of a job site, the workers want a representative to walk the site alongside the compliance officer. What right does this reflect?

• A. The right to require the compliance officer to submit every inspection finding for a formal pre-approval vote by site management before any citation may be issued
• B. The right to have an employee representative accompany the compliance officer during the walkaround portion of the inspection
• C. The right to replace the compliance officer with a third-party auditor chosen by the employer
• D. The right to demand the inspection be canceled outright if the general contractor objects to a walkaround

100. A worker asks to review the log of work-related injuries and illnesses their employer is required to keep for the current and past several years. What is this record generally called, and does the worker have a right to see it?

• A. The OSHA 300 Log; current and former employees and their representatives have a right to review it
• B. The OSHA 300 Log; only the employer's insurance carrier is permitted to review its contents
• C. The OSHA 500 Log; it may only be reviewed by a federal compliance officer during a scheduled inspection
• D. The OSHA 300 Log; access is limited to workers who were injured during the current calendar year