OSHA 10 Practice Test

1. A carpenter is installing a guardrail system along an open-sided floor. What is the general height range OSHA specifies for the top rail of a standard guardrail?

• A. 24 to 30 inches
• B. 30 to 36 inches
• C. 48 to 60 inches
• D. 39 to 45 inches

2. A worker is climbing a straight ladder to access a second-floor work area while carrying a small tool bag on a belt. What ladder safety practice should they follow while climbing?

• A. Face away from the ladder while descending for better visibility
• B. Maintain three points of contact with the ladder at all times
• C. Climb quickly to minimize total time on the ladder
• D. Carry tools in both hands to keep the ladder steady

3. Workers are erecting a tube-and-clamp scaffold that will reach several stories high. At what height above a lower level does fall protection generally become required for workers on a scaffold platform?

• A. 10 feet
• B. 15 feet
• C. 20 feet
• D. 4 feet

4. A worker is preparing to work near an unprotected edge on a partially framed floor of a building under construction. At what height above a lower level does OSHA generally require fall protection in construction work?

• A. 4 feet
• B. 6 feet
• C. 10 feet
• D. 15 feet

5. A worker sets up a straight extension ladder against a wall to reach a second-story window. What general rule describes the proper base-to-wall distance for a safely angled ladder?

• A. The base should be placed exactly two feet from the wall regardless of ladder length
• B. The base should touch the wall directly for maximum stability
• C. The base should be about one-quarter of the working ladder length away from the wall
• D. The base distance is irrelevant as long as the ladder is tied off at the top

6. A scaffold platform has tools and small materials stored near its edge, above an area where other workers walk below. What guardrail component is specifically intended to keep these items from falling off the edge?

• A. The top rail
• B. A toe board
• C. The midrail
• D. A vertical support post

7. A worker will be tying off close to floor level, where a standard six-foot shock-absorbing lanyard would let him fall most of the way to the ground before the system engages. What is the better equipment choice for this situation?

• A. The same shock-absorbing lanyard, since all fall-arrest lanyards perform identically regardless of anchorage height
• B. A self-retracting lifeline, which arrests a fall in a much shorter distance than a standard lanyard
• C. A longer lanyard, since more length gives the deceleration device more room to work
• D. No fall-arrest equipment, since being close to the ground makes tie-off unnecessary

8. A roofer is connecting to a personal fall arrest system before working near a roof edge. Which three components must work together for the system to function properly?

• A. A guardrail, a toe board, and a warning line strung six feet back from the roof edge
• B. A hard hat, safety glasses, and steel-toe boots rated for impact and compression
• C. An anchorage point, a full-body harness, and a connecting device such as a lanyard
• D. A ladder, a ground-level spotter, and a set of standardized hand signals

9. A supervisor is evaluating whether a rooftop anchor point is strong enough to serve as a tie-off for a single worker's personal fall arrest system. Conceptually, what standard should that anchor point be able to meet?

• A. It must be capable of supporting the significant forces generated by arresting a fall for each attached worker, or be designed by a qualified person
• B. It needs no engineering evaluation at all as long as it is bolted somewhere onto the building's structural frame, regardless of what that member was designed to carry
• C. It only needs to hold the static standing weight of the worker with no margin for a sudden dynamic load
• D. It must simply sit higher than the worker's head at every point during the connecting work being performed

10. A worker is walking across a mezzanine floor that has several unused floor holes and skylights nearby. What is the correct way to protect workers from these openings?

• A. Mark the openings with bright paint so workers can visually avoid stepping near them during the shift
• B. Leave the openings open only during daylight hours, on the theory that visibility of the hazard is presumed to be better then
• C. Cover the openings with material strong enough to support anticipated loads, or guard them with a standard railing
• D. Post a sign warning of the hazard at the mezzanine entrance instead of physically covering or guarding it

11. A contractor is evaluating fall protection options for a flat industrial roof where installing guardrails around the entire perimeter isn't feasible. What is a recognized alternative system that catches a worker who has already fallen?

• A. A safety net system positioned to catch a falling worker
• B. A hard hat rated for impact protection from objects falling from above the work area
• C. A warning line placed at the exact edge of the roof rather than set back from it
• D. A single handrail installed only at the top of the access ladder to the roof

12. A walkway on a job site has an abrupt change in elevation of about two feet between two work areas, with workers frequently moving between them. What does this situation call for?

• A. Nothing extra, since workers can simply step down carefully between the two elevations
• B. A rope strung loosely across the gap to serve only as a visual reminder of the change in level
• C. A verbal warning repeated by the supervisor at the start of each shift about the elevation change
• D. A stairway, ladder, ramp, or similar means of access at that point

13. A crew is performing built-up roofing work on a large, low-slope commercial roof and wants to use a warning line system instead of guardrails around the working area. How must a warning line system be used to be effective?

• A. It can be placed at any distance from the edge at all as long as the rope or wire itself is brightly colored, tightly stretched, and clearly visible from a distance
• B. It replaces the need for any additional protection once it is installed, no matter how close it sits to the edge
• C. It only needs to be installed along one side of the roof, leaving the remaining perimeter unmarked
• D. It must be set back an adequate distance from the roof edge and combined with additional precautions for work performed between the line and the edge

14. A crew needs to work for several hours near the unprotected edge of a steep-slope roof, replacing damaged shingles. Which of these is an appropriate way to protect them from falling off the edge?

• A. Reminding workers verbally at the start of the task to be careful near the unprotected edge
• B. Working only during daylight hours so the crew can see the edge of the steep-slope roof clearly
• C. Keeping tools and shingle bundles organized so no one trips on debris while working near the edge
• D. A personal fall arrest system anchored to a rated point, or a guardrail system along the edge

15. A carpenter arrives at a second-floor deck where the perimeter has no guardrails installed and no one is tied off. Framing work is scheduled to start immediately. What should happen before any work begins at the open edge?

• A. Work can begin exactly as planned on the open-edge deck, since guardrails are treated as necessary only once the framing phase itself is fully finished
• B. A supervisor should mark the open edge with flagging tape and allow the framing crew to keep working past it
• C. Fall protection, such as guardrails, safety nets, or a personal fall arrest system, must be put in place before anyone works near the unprotected edge
• D. Workers can proceed near the edge as long as they estimate staying at least an arm's length back from it

16. A worker sets up a straight extension ladder against a wall to access a second-story window, planting the base much closer to the wall than the ladder's rated angle calls for. Why is this setup a fall hazard?

• A. The steep angle makes the ladder prone to tipping backward away from the wall as the worker climbs
• B. It is not a hazard at all as long as a coworker holds the base steady while the worker climbs
• C. It is only a hazard if the ladder's rungs happen to be wet or coated with mud at the moment the worker climbs it
• D. The angle rule only governs stepladders, since extension ladders are rated for any base placement

17. A worker climbs a straight ladder that has been set up so its top ends exactly level with the roof edge he is stepping onto. What is the concern with this setup?

• A. There is no concern at all as long as the base of the ladder is tied off to some fixed anchor point on the roof structure
• B. The ladder is fine as set up because the top rung is built to be the strongest point on the rail
• C. The ladder should extend well past the landing surface so the worker has something to hold onto while stepping off
• D. The concern only applies when the ladder is made of metal, not when it is fiberglass or wood

18. A scaffold platform on a renovation project has planks laid across only part of its width, leaving a gap along one side where workers walk. What is the hazard with this arrangement?

• A. None, as long as the unplanked gap happens to run along the side of the platform away from the building
• B. Gaps of this kind are acceptable on any scaffold that stands under two working levels in overall height
• C. The gap only becomes a hazard once tools or spare materials are actually stored on that section of platform
• D. The open gap creates a fall-through hazard, so the platform should be fully planked or the gap guarded

19. An inspector reviewing a fabricated scaffold above ten feet notes it has a top rail and toe boards installed but nothing at mid-height. What is missing from a complete guardrail system on this platform?

• A. A midrail or equivalent barrier between the top rail and the platform surface
• B. Nothing; a top rail paired with toe boards alone already satisfies a complete guardrail system on this platform
• C. A second top rail installed a few inches below the first rail, running parallel along the same edge
• D. An additional toe board added to the opposite side of the platform where no workers are currently stationed

20. Before climbing a stepladder to reach overhead ductwork, a worker notices one of the rungs is cracked and a hinge is loose. What should the worker do?

• A. Use the ladder carefully, keeping weight off the cracked rung while climbing to the ductwork
• B. Tape over the visible crack with duct tape and continue using the ladder for the rest of the day
• C. Remove the ladder from service and use a different, undamaged ladder or report it for repair
• D. Use the ladder only for very short tasks near the ground rather than the overhead ductwork job

21. An electrician working on a rooftop clips his fall-arrest lanyard to a nearby HVAC conduit because it is close and roughly chest height. What is wrong with using this as an anchorage point?

• A. Nothing is wrong here, since any fixed object at roughly chest height can serve as a valid anchorage point
• B. It is fine as long as the lanyard itself carries a tag showing it is rated for the worker's body weight
• C. The conduit was never evaluated or rated to hold the forces of arresting a fall, so it could fail under load
• D. Anchorage strength only matters when rigging a horizontal lifeline, not for a single-point tie-off like this

22. A framing crew cuts a hole in a subfloor for a future stairwell and leaves it uncovered overnight while other trades continue walking through the area. What should have been done before leaving the hole unattended?

• A. Nothing extra was needed here, since the framing crew already planned to cover the stairwell opening again within a day or two
• B. The hole should be covered with a secured, load-rated cover or otherwise guarded, and marked so no one walks into it
• C. A single sheet of plywood laid loosely across the opening overnight is sufficient without fastening it down
• D. Only a warning sign at the edge of the subfloor is needed; a physical cover over the hole is not required

23. A crew is installing membrane roofing on a large, low-slope commercial roof, working well back from the edge. Instead of guardrails around the entire perimeter, the crew uses a warning line system paired with a designated safety monitor. Is this an acceptable approach on this kind of roof?

• A. No, guardrails are the only fall-protection method OSHA ever permits on a low-slope commercial roof of this general kind and pitch
• B. Yes, a warning line combined with a safety monitor can be an acceptable fall-protection method on this kind of low-slope roof work
• C. No, warning lines exist only to control vehicle and equipment traffic and play no role in fall protection
• D. Yes, but only if the safety monitor is also physically tied off to the same anchorage as the roofing crew

24. A crew working on an older warehouse roof needs to walk near several skylights that are flush with the roof surface and not obviously distinguishable from the surrounding decking. What is the main fall hazard these skylights present?

• A. None, skylights on an older warehouse roof are built to support a worker's full weight just like the decking
• B. Skylights are typically not load-bearing and can fail if stepped on, so they must be covered or guarded
• C. The only real issue is glare off the panels, which a pair of sunglasses resolves for the crew
• D. Skylights are a hazard only when they are visibly cracked or otherwise show obvious physical damage

25. Steel erection work on a high-rise frame is underway at a height where guardrails cannot be installed and workers cannot always stay tied off during connecting work. What fall-protection method is designed for exactly this kind of situation?

• A. A safety net system rigged beneath the work area to catch a fall
• B. A verbal buddy system in which a coworker watches the connector's footing and calls out any slip
• C. Floodlights aimed at the connecting work area to improve visibility for the crew during the shift
• D. Scheduling the connecting work to take place only during periods of calm, low wind conditions

26. A worker climbs a frame scaffold by stepping on the diagonal cross braces instead of using the built-in ladder or attached access frame. Why is this a fall hazard?

• A. It isn't a hazard at all as long as the worker holds on with both hands while stepping up the braces
• B. Cross braces are not designed as a climbing surface and can shift or provide unstable footing
• C. Cross braces are fine to use as a climbing surface on any scaffold standing under three working levels
• D. The hazard only applies to scaffolds that are mounted on wheels rather than fixed base plates

27. To save time, a worker leans a closed stepladder against a wall like a straight ladder instead of fully opening and locking its spreaders. What is the problem with this setup?

• A. There is no problem here, since a stepladder is engineered to be just as strong and stable closed as it is fully open and locked
• B. A stepladder used in the closed, leaning position is unstable because it was not designed to be used that way
• C. The only real issue with this shortcut is that it looks unprofessional to other trades on the job site
• D. It becomes a problem only if the wall surface the ladder is leaning against happens to be smooth

28. An ironworker tying rebar needs both hands free while leaning back against a work-positioning lanyard that keeps tension on him at all times. Which type of fall-protection system is this describing?

• A. A fall-arrest system, which stays slack during normal work and is designed to catch a worker only after a fall starts
• B. A work-positioning system, which holds a worker in place against a structure so both hands are free for the task
• C. A ladder safety system, a device built specifically for protecting a worker during vertical climbing only
• D. A rescue system, equipment that comes into play only after a fall has already occurred and been arrested

29. A contractor sets up temporary power on a job site for workers to plug in power tools. What is a common method OSHA recognizes for protecting workers from ground faults on these temporary circuits?

• A. Using only extension cords rated for indoor use
• B. Wrapping exposed wiring with electrical tape instead of replacing damaged cords
• C. Relying on workers to visually inspect cords before every single use as the sole protection
• D. Using ground-fault circuit interrupters (GFCIs) on temporary receptacles

30. A worker finds an extension cord on site with a section of outer insulation worn away, exposing the inner wires. What should the worker do before continuing to use it?

• A. Continue using it as long as the exposed section faces away from foot traffic
• B. Wrap it once with tape and use it only for the remainder of the shift
• C. Remove it from service and have it repaired or replaced before further use
• D. Use it only in dry weather conditions to reduce risk

31. Before starting excavation work for a new footing, a crew supervisor needs to find out whether any underground electrical lines run through the work area. What should happen first?

• A. Digging can begin, since underground lines are the utility company's responsibility to mark, not the crew's
• B. The crew should have the area marked through a utility locate service before any digging begins
• C. A quick visual check of the surface is sufficient to rule out underground lines
• D. Only digging deeper than several feet requires checking for underground lines

32. An electrician needs a ladder to reach a panel located near energized equipment. Which type of ladder should generally be avoided in this situation?

• A. A wooden ladder
• B. A fiberglass ladder
• C. A metal ladder, since it conducts electricity
• D. Any ladder rated for the worker's weight is acceptable regardless of material

33. In the 10-hour construction outreach course, the Electrocution Hazards topic is one of the Focus Four hazard areas covered. What is the minimum amount of dedicated time this topic must receive in the course?

• A. At least 3 hours
• B. There is no minimum time requirement for this topic
• C. Only the Fall Hazards topic has a minimum time requirement
• D. At least 30 minutes

34. A crew has run an extension cord through a closed doorway for several weeks to power lighting in an adjacent room, with the door regularly opened and shut against it. What is the hazard with this arrangement?

• A. There is no hazard here at all as long as the flexible cord running through the doorway is a heavy-duty type
• B. Repeatedly pinching the cord in the doorway can damage its insulation over time and create a shock hazard, and it shouldn't be used as substitute permanent wiring
• C. The only real issue with running the cord through the doorway for several weeks is that it looks unprofessional to visitors touring the site and its finished office spaces upstairs
• D. The hazard only applies if the extension cord happens to be physically longer than the room it powers

35. A maintenance worker needs to service a piece of electrical equipment that could unexpectedly re-energize while they are working on it. What procedure is designed to prevent this?

• A. Posting a verbal reminder to coworkers not to touch the equipment while it remains under power
• B. Wearing insulated gloves while the equipment stays energized and running normally throughout the repair
• C. Working as quickly as possible on the live equipment to minimize the worker's exposure time
• D. Lockout/tagout, which de-energizes and secures the equipment before work begins

36. Construction safety training identifies four hazard categories responsible for most worker fatalities in the industry. Which of the following is one of these four leading hazards?

• A. Exposure to ordinary office noise levels from printers and phones in a site trailer
• B. Slips on wet office flooring inside a job-site trailer used for daily paperwork
• C. Electrocution from contact with energized sources
• D. Repetitive stress injury from prolonged awkward postures during finish carpentry work

37. A worker needs to use a corded power tool near a puddle of standing water on a job site after recent rain. What precaution most directly reduces the electrocution risk in this situation?

• A. Ensuring the circuit is protected by a GFCI and keeping cords and connections out of the standing water
• B. Wearing a hard hat rated for impact protection from objects falling near the wet work area
• C. Switching to a longer extension cord so the outlet feeding the tool sits farther from the puddle
• D. Using the corded tool only during the middle of the day, on the theory that the standing puddle may have partly evaporated by then

38. A worker is assigned to trace and identify circuits in an older section of a building before starting renovation work, but some wiring is unlabeled and its status is unknown. What is the safest general approach?

• A. Assume unlabeled wiring found in the older section is not connected to any live circuit in the building
• B. Test the wiring only with a coworker present, but proceed with the work without ever verifying it's de-energized
• C. Cut into the unlabeled wiring carefully at a slow pace to observe whether there is any reaction
• D. Treat unidentified wiring as energized until it has been properly tested and verified de-energized

39. A crane operator is preparing to move a boom near overhead power lines on a job site. Without confirming the lines have been de-energized, what general practice should the crew follow regarding clearance from the lines?

• A. Maintain a substantial minimum clearance distance from the lines at all times, treating them as energized
• B. Move the boom as close as needed to complete the lift efficiently, since most overhead lines are fully insulated
• C. Only maintain clearance from the lines if they visibly appear to be sagging low or physically damaged
• D. Clearance distance from the lines only matters at the moment the crane is actively lifting a load

40. A worker is choosing a power tool for a task where the tool's casing might occasionally contact a grounded metal surface. What does a double-insulated tool provide in this situation?

• A. Complete immunity from any electrical hazard whatsoever, eliminating the need for GFCI or any other precaution
• B. Protection only when the tool is also plugged into a circuit with GFCI protection, and no benefit otherwise
• C. The exact same protection a worker gets from wearing rubber-soled boots, making the boots unnecessary to wear
• D. An added layer of protection by isolating the internal wiring, without needing a separate grounding conductor

41. A worker is looking for a place to temporarily store scrap lumber and notices an electrical panel with some open floor space in front of it. What is the concern with stacking materials there?

• A. There is no concern here at all as long as the panel's outer door stays latched shut while lumber is stored
• B. It is fine to stack the lumber there as long as the stored materials themselves are non-flammable
• C. It can block required clear access to the panel needed for safe operation or emergency shutoff
• D. It is only a problem if the panel happens to be labeled as a high-voltage enclosure on its cover

42. A generator's power cord runs directly through a puddle of standing water on a job site, and a laborer needs to plug in a saw nearby. What is the primary concern with this setup?

• A. Water pooling around energized cords and connections creates a serious shock hazard, even if the insulation appears fine
• B. There is no concern here as long as the generator cord's outer insulation looks intact from a visual check
• C. The concern only applies to cords that carry a rating limiting their use to strictly indoor applications
• D. The main issue with the generator cord running through the puddle is that a passing worker could trip over the length of it while walking by

43. A crew is running power tools from temporary extension cords across an outdoor job site. What is the purpose of using ground-fault circuit interrupter (GFCI) protection on these circuits?

• A. GFCI protection exists mainly to prevent extension cords from overheating during long periods of extended use
• B. GFCI protection exists only to stop the panel's main circuit breaker feeding the temporary cords from tripping unexpectedly during the day
• C. GFCI protection quickly cuts power if current is leaking to ground through a person or damaged equipment, reducing shock risk
• D. GFCI protection is intended to extend the working service life of the extension cords used on the circuit

44. A crew is preparing to move an extension ladder to a new position, and overhead power lines run close to the path they plan to carry it. What should the crew do before moving the ladder?

• A. Carry the ladder quickly through the area beneath the lines so the crew's exposure time is minimized
• B. Lower the ladder flat to the ground and drag it under the overhead lines rather than carrying it upright
• C. Proceed with the move as normal, since aluminum is treated as the only ladder material anywhere capable of conducting electricity toward a worker
• D. Identify a route or a method that keeps the ladder and workers a safe distance from the energized lines, rerouting or de-energizing if needed

45. A maintenance worker needs to clear a jam inside a piece of powered equipment. Before reaching into the machine, what should the worker do to the equipment's energy sources?

• A. Identify and isolate all of the equipment's energy sources, then lock and tag them out and verify zero energy before reaching in
• B. Turn the equipment off at the operator control panel and begin reaching in to clear the jam immediately
• C. Ask a coworker to physically hold the power switch in the off position the whole time the worker reaches deep into the machine to clear it
• D. Unplug the equipment if it has a cord, but skip any lockout step entirely for equipment that is hard-wired

46. After completing lockout/tagout steps on a piece of equipment, a technician is about to begin the repair. What should the technician do immediately before making contact with the equipment?

• A. Begin work right away, since completing the lockout steps already confirmed the equipment was made safe
• B. Ask a coworker to confirm verbally, from across the room, that the correct breaker was switched off before the repair starts
• C. Test the equipment with an appropriate meter or tester to verify it is actually de-energized before touching it
• D. Check only whether the equipment's indicator light has gone dark before making physical contact with it

47. A temporary power distribution panel on site has several open knockout holes where breakers were removed, exposing wiring and terminals inside the box. What is the concern with leaving the panel in this condition?

• A. There is no concern here at all as long as the panel's outer door itself remains closed and latched
• B. Open knockout holes on a panel like this are only a fire code violation, not an actual shock hazard
• C. The panel is fine to leave exactly as is, since only trained electricians on the crew are ever expected to open its cover
• D. Open knockouts leave energized parts exposed to accidental contact and should be closed with proper covers or plugs

48. Rain begins falling while a crew is using corded power tools outdoors. What is the safest response?

• A. Continue working straight through the rain, since GFCI protection by itself makes any weather condition acceptable to keep working in
• B. Switch over to battery-powered tools without changing anything else about the rest of the outdoor work area
• C. Stop and assess conditions, protecting or de-energizing equipment as needed before continuing to work in wet conditions
• D. Keep working with the corded tools as long as their labeling states they carry an outdoor-rated designation

49. A worker is transferring flammable solvent from a large drum into a smaller metal container on site. What precaution addresses the risk of a static spark igniting vapors during the transfer?

• A. Performing the solvent transfer as quickly as possible to limit how much vapor builds up above the liquid
• B. Bonding the drum and the receiving container together, and grounding them, before starting the transfer
• C. Using a plastic funnel during the pour, since plastic speeds up the transfer compared with a metal one
• D. Performing the transfer only inside an air-conditioned space rather than out in the open jobsite air

50. An electrician preparing to work on a panel that cannot be fully de-energized reaches for a pair of ordinary work gloves. Why are ordinary work gloves not appropriate for this task?

• A. Glove material makes no real difference to shock risk once the panel's cover has already been opened
• B. Ordinary work gloves are fine for this energized panel as long as they happen to fit the electrician's hands snugly, comfortably, and without any slipping
• C. Ordinary gloves have no tested electrical insulation rating and won't protect against shock or arc flash the way rated electrical gloves do
• D. Ordinary gloves become acceptable for this task as long as they are made from genuine leather material

51. A worker needs to clear a jam from a piece of machinery with exposed moving gears and belts. What should happen before the worker reaches into the machine?

• A. The worker should reach in quickly between cycles of the machine's movement
• B. The worker should ask a coworker to watch and warn them if the machine restarts
• C. The worker should use a long tool to avoid direct hand contact, while the machine keeps running
• D. The machine should be shut down and locked out before any attempt to clear the jam

52. An excavation has been open for several days, and it rained heavily overnight. Before workers re-enter the trench the next morning, what should happen?

• A. Workers can enter again as long as the trench walls appear dry on the exposed surface that morning
• B. Only the trench box itself needs to be visually checked from a distance before anyone climbs down
• C. A competent person must reinspect the excavation for new hazards caused by the rain before work resumes
• D. Work can resume immediately, since the protective system had already been inspected once before the storm

53. A crew is stacking excavated soil next to an open trench as they dig. Why is it important to keep this spoil pile set back from the edge of the trench rather than piling it right at the lip?

• A. Material piled too close to the edge adds weight that can increase the risk of a wall collapse
• B. It only matters for keeping the site looking visually organized for a client walkthrough
• C. It is only a concern if the spoil pile happens to be blocking a walkway used by other trades
• D. Spoil piles have no effect on trench stability at all once the trench itself has already been shored properly

54. Before workers enter a deep trench where hazardous gases could accumulate below grade, what atmospheric precaution should typically be taken?

• A. None, since hazardous atmospheres only ever develop inside fully enclosed, permit-required confined spaces
• B. Testing is only required if a worker already reports feeling dizzy or lightheaded after climbing in
• C. A visual check for discoloration in the trench soil is sufficient to rule out a hazardous atmosphere
• D. The atmosphere should be tested for oxygen levels and hazardous gases before entry

55. A worker needs to perform maintenance inside a large piece of stationary equipment with a rotating auger that could restart if power were restored. Which hazard category does this situation primarily represent, and what prevents it?

• A. A struck-by hazard, a risk that is fully addressed simply by the worker wearing a hard hat
• B. An electrocution hazard only, a risk that GFCI protection on the circuit alone fully addresses
• C. A caught-in hazard, prevented by properly locking out the equipment's energy source before entry
• D. A health hazard, one that is adequately addressed by the worker wearing a respirator during entry

56. A crew is preparing to dig a trench deep enough that workers will need to enter it for a utility installation. Based on general excavation safety rules, what must be in place before workers enter the trench?

• A. A single ladder placed anywhere along the length of the trench, at the crew's discretion
• B. Nothing extra, since a trench of this planned size is generally considered too shallow to matter
• C. A protective system such as sloping, shoring, or shielding, unless the trench is in stable rock
• D. A warning sign posted at the entrance to the site, visible before anyone reaches the trench itself

57. A trench used for a utility line is deep enough to require entry and extends a long distance along the utility route. What egress feature should be provided so workers can exit quickly in an emergency?

• A. A single ladder placed only at the far end of the trench, away from where most of the crew works
• B. No egress feature is required at all as long as the trench already has a shoring system installed
• C. Ladders or ramps spaced so that workers never have to travel too far laterally to reach one
• D. A rope thrown down from ground level to whichever worker happens to need it in the moment

58. A crew is using a trench box (shield) to protect workers digging a utility trench. What is an important limitation of a trench box that workers should understand?

• A. It eliminates the need for atmospheric testing inside the trench once the pre-fabricated metal box has been lowered fully down into place
• B. It removes the need for a competent person to ever inspect the excavation once the box is installed
• C. It protects workers inside the shielded area but does not necessarily prevent the surrounding soil from collapsing outside or above it
• D. It adjusts itself to fit trenches of any depth without the crew making any modification to the shield's frame

59. A worker is assigned to work at height using a personal fall arrest system. Which piece of equipment is required as the connection point between the worker's body and the system, rather than a simple body belt?

• A. A reflective vest
• B. A hard hat with chin strap
• C. Steel-toe boots
• D. A full-body harness

60. An electrician working near exposed low-voltage conductors needs a hard hat rated for some degree of electrical protection. Which hard hat class is generally designed to provide protection against contact with certain energized conductors?

• A. Class E
• B. Class G
• C. Class C
• D. There is no hard hat class rated for any electrical protection

61. Workers are cutting concrete with equipment that generates a significant amount of fine dust, and engineering controls like water suppression are not fully eliminating airborne exposure. What PPE should be added in this case?

• A. An appropriate respirator selected for the specific airborne hazard
• B. A face shield alone, since it blocks dust from reaching the mouth and nose
• C. Standard safety glasses, which filter fine dust particles
• D. Earplugs, since dust exposure is primarily an ear hazard

62. A worker has been operating loud equipment for years without consistent use of hearing protection. What is true about the type of hearing damage this exposure can cause?

• A. It is always temporary and fully reverses after a period of rest
• B. It can be cumulative over time and permanent once it occurs
• C. It only affects the ear that was closer to the noise source
• D. It has no connection to the duration of noise exposure

63. A worker believes their employer is violating a safety standard but is worried about losing their job if they speak up. Under OSHA's law, what protection applies to this worker?

• A. The worker must first resolve the issue directly with the employer before OSHA can get involved
• B. The worker loses whistleblower protection if they file the complaint anonymously
• C. The worker is protected from retaliation for filing a safety complaint or reporting a hazard
• D. The worker can only be protected if the hazard has already caused an injury

64. A crew includes several workers whose primary language is different from the one safety training is normally delivered in. What is expected of the employer regarding how that training is provided?

• A. Training can be delivered only in the trainer's preferred language, since translation is the worker's responsibility
• B. Training and instructions need to be delivered in a language and vocabulary the workers can actually understand
• C. Written materials in English are sufficient regardless of what workers can read
• D. Language differences are irrelevant as long as workers can operate the equipment

65. A worker completes the 10-hour construction outreach course and is waiting on the training provider to send the official completion card. Within what timeframe should the provider generally issue that card after the course ends?

• A. Within 90 days of course completion
• B. Within 24 hours of course completion
• C. There is no expected timeframe for issuing the card
• D. Only within the same calendar year the course was taken

66. A worker who earned their construction 10-hour completion card several years ago wonders whether it needs to be renewed or if it has expired. What is true about this card?

• A. It expires after a set number of years and must be renewed
• B. Construction 10-hour and 30-hour cards do not expire
• C. It expires only if the worker changes employers
• D. It must be renewed annually regardless of employer

67. A specific OSHA standard does not clearly address a particular hazard on a job site, but the hazard is well recognized as one that can cause serious harm. Is the employer still obligated to address it?

• A. No, if a hazard is not named anywhere in a specific OSHA standard, the employer carries no legal obligation to address it under any general framework
• B. Yes, but only once OSHA has already issued a citation for that same hazard at some other worksite first
• C. No, addressing a hazard with no specific standard covering it is left entirely to each worker's own judgment
• D. Yes, employers must keep the workplace free of recognized hazards likely to cause serious harm, even without a specific standard covering it

68. A supervisor tells new hires that OSHA rules only apply to large companies with many employees. Is this an accurate description of OSHA's coverage of private-sector construction work?

• A. Yes, coverage begins only once an employer's payroll reaches 50 or more construction employees
• B. Yes, coverage extends only to employers performing work under a federal government contract
• C. No, whether an employer is covered depends solely on the company's annual gross revenue
• D. No, OSHA coverage generally extends to nearly all private-sector employers regardless of size

69. A masonry contractor uses a process that isn't specifically addressed by any OSHA standard, but employees are regularly exposed to a serious, well-documented hazard from it. Which principle allows OSHA to still address this hazard?

• A. The General Duty Clause, requiring employers to furnish a workplace free of recognized serious hazards
• B. The multi-employer worksite doctrine, which assigns hazard responsibility only to whichever contractor holds the site permit
• C. The Hazard Communication Standard, which covers labeling and safety data sheets for chemical hazards only
• D. State-plan preemption, under which a state OSHA plan removes federal enforcement authority entirely

70. A crew includes several workers whose primary language is not English. What does OSHA require regarding their safety training?

• A. Training may be delivered only in English on the theory that written handouts satisfy the comprehension requirement
• B. Training obligations run only to supervisors, since they are responsible for relaying safety information to their crews
• C. Workers must locate and pay for their own interpreter before the employer's training session may begin
• D. Training and instructions must be presented in a language and vocabulary the workers can understand

71. A worker is assigned a task they reasonably believe could cause death or serious injury, and there isn't enough time for OSHA to inspect and address it through normal channels. What is this situation called, and what may the worker generally do?

• A. An imminent danger situation, in which the worker may refuse the task under specific legal conditions
• B. A minor hazard, which the worker must complete on schedule while filing a written complaint afterward
• C. A recordable incident, a classification that only governs how the resulting injury gets logged later
• D. A jurisdictional dispute, which must first be resolved by the state labor board before work continues

72. A new worker is told to just watch what other crew members do instead of being told what chemicals they will be working near. Which OSHA principle is being violated?

• A. The worker's right to know about chemical hazards through labels and safety data sheets
• B. The multi-employer worksite doctrine, which only assigns duties between contractors on the same site
• C. The imminent danger provision, which lets a worker refuse a task posing a threat of death or serious harm
• D. The recordkeeping requirement that governs how a workplace injury gets entered on the OSHA 300 log

73. A worker wants to review the log of recordable injuries and illnesses that occurred at their worksite over the past year. What right do they have?

• A. They may view the records only after obtaining written permission from the employer's insurance carrier
• B. Access is limited to workers who file a formal written request through the site safety committee
• C. Employees have the right to access their employer's injury and illness records upon request
• D. Access to the log is limited to workers who were personally injured during the period covered

74. Several different subcontractors are working on the same building site under one general contractor. If the general contractor's supervisor notices a serious hazard created by a subcontractor's crew, what is generally true about responsibility?

• A. The general contractor owes no duty to act because its own employees did not create the hazard
• B. Only the subcontractor whose crew physically created the hazard can be cited for it, regardless of who controls the site
• C. The general contractor can be held responsible for failing to correct a hazard it controls or should have detected
• D. Responsibility for a hazard on a multi-employer site is assigned only after the project's final walkthrough inspection

75. A worker reports a serious hazard to a supervisor, but weeks pass with no correction made. What right does the worker have under OSHA if the employer does not fix the hazard?

• A. The worker has exhausted their options once the supervisor has been told about the hazard one time
• B. The worker must wait for an injury to actually occur before an inspection can be requested
• C. Only a union representative, not an individual worker, may request that OSHA inspect the workplace
• D. The worker can request that OSHA inspect the workplace to address the uncorrected hazard

76. A new hire wants to review a worksite's history of injuries and illnesses before deciding whether to accept certain overtime shifts. Does the worker have a right to see this information?

• A. Yes, workers generally have the right to access their employer's injury and illness records
• B. No, injury and illness records are confidential business information reserved for management review
• C. No, that log may be reviewed only by a compliance officer conducting an official OSHA inspection
• D. Yes, but only after the worker has completed a full year of employment at that worksite

77. After a worker files a safety complaint with OSHA about conditions at their job site, their supervisor begins assigning them noticeably worse shifts and tasks compared to before. What has occurred here?

• A. This only becomes a problem once the worker is fired outright rather than just reassigned to worse shifts
• B. This is potential retaliation, which is prohibited when a worker exercises their right to file a safety complaint
• C. This is acceptable so long as the supervisor never states the complaint out loud as the reason for the change
• D. This is an ordinary scheduling decision that happens to follow the complaint by coincidence, according to the supervisor

78. A training provider wants to compress the entire 10-hour construction outreach course into a single long day to finish faster. Is this allowed under the course's structure?

• A. No, the 10-hour course must be spread across a minimum number of calendar days rather than compressed into one
• B. Yes, the trainer may schedule the full 10 hours back to back within a single calendar day if the class agrees to it
• C. Yes, but a single-day, single-session format is permitted only when the entire class is delivered online
• D. No, the course structure requires the full class to be spread across at least a full seven-day calendar week

79. A worker finishing the 10-hour construction outreach course asks whether they need to pass a written exam to receive their completion card. What is actually true about this requirement?

• A. Yes, a passing score on a standardized final exam set by OSHA is required by the program before any card can be issued
• B. Yes, but only the two hours of elective topics are tested, not the six hours of required topics
• C. No, OSHA does not require a test to earn the card, and any quiz given is left to the trainer's discretion
• D. No, but a background check administered by the training provider replaces the exam requirement instead

80. In the 10-hour outreach course's curriculum, the Fall Hazards topic is allotted noticeably more required instructional time than the other Focus Four topics like Struck-By or Caught-In/Between Hazards. Why does the course structure it this way?

• A. All four Focus Four topics actually receive the exact same required half-hour block under the Outreach Procedures, regardless of how many fatalities each one causes industry-wide
• B. Fall Hazards happens to be scheduled last on most trainers' agendas, so instructors pad it with leftover minutes before the break
• C. The extra time exists only because a separate hands-on practical exam is built into the Fall Hazards portion of the class
• D. Falls account for the largest share of construction fatalities among the Focus Four, so the topic is weighted with more required time than the other three

81. A worker needs to reach the far side of the site quickly and considers walking underneath a load that a crane currently has suspended overhead. What is the correct practice here?

• A. It is fine to walk under the load briefly since the rigging has already been inspected
• B. Never walk or stand underneath a suspended load; take a route around it instead
• C. It is acceptable if the worker is wearing a hard hat
• D. It is acceptable only if the crane operator is watching the load closely

82. A worker is walking beneath scaffolding where other crew members are working above with hand tools. What is the primary purpose of the hard hat this worker is wearing?

• A. To protect the head from impact by falling objects such as tools or debris
• B. To provide hearing protection from the noise generated by nearby equipment overhead
• C. To shield the eyes from flying particles kicked up by hand tools above
• D. To provide fall protection to the worker if they happen to trip while walking

83. A dump truck needs to back up across an active work zone where several workers are on foot near material stockpiles. What practice most directly reduces the risk of a worker being struck by the reversing vehicle?

• A. Requiring the driver to sound the horn a single time right before starting to reverse the truck
• B. Restricting all backing maneuvers to only the very beginning of the shift before workers arrive
• C. Painting the back of the truck a bright color so it stands out against the material stockpiles
• D. Using a designated spotter with a clear line of sight and communication with the driver

84. An excavator is rotating its cab and boom while digging near a walkway used by other trades. What hazard does the equipment's swing radius create for nearby workers?

• A. It creates a hazard only for the equipment operator seated in the cab, not for any bystanders walking nearby on foot
• B. Workers within the swing radius can be struck or crushed by the rotating body or boom of the machine
• C. It is a hazard only at the moment when the excavator's bucket happens to be fully loaded
• D. It only creates a noise exposure concern for nearby trades, not an actual physical strike hazard

85. Workers are cutting rebar with a power saw, producing small metal fragments that fly outward from the cutting point. What PPE most directly protects against being struck by these fragments?

• A. Hearing protection sized to reduce the noise generated by the power saw during the cut
• B. Steel-toe boots rated to resist impact and compression from objects dropped near the feet
• C. A hard hat rated for impact protection from objects falling from directly above the cutting point
• D. Safety glasses or a face shield providing eye and face protection

86. A crane is lifting a load of steel beams over an active work area before setting them in place. What should workers on the ground do while the load is suspended overhead?

• A. Continue their normal work routine as long as each worker is wearing a hard hat at the time
• B. Approach the suspended load to help the rigger guide it into its final position by hand
• C. Stay clear of the area beneath and around the suspended load's travel path
• D. Only move out of the way once the load is already positioned directly overhead of them

87. Site management is deciding whether to continue crane lifting operations as wind speeds increase throughout the afternoon. Why is wind speed relevant to struck-by hazards during lifting operations?

• A. Wind speed during a lift mainly affects the crew's physical comfort standing on the ground rather than the mechanics of the crane's lift itself
• B. Wind speed only becomes a relevant factor for crane lifts that happen to be performed after dark at night on that particular site
• C. Wind has no meaningful effect at all on a load made of rigid materials like structural steel or precast concrete
• D. High winds can cause a suspended load to swing or spin unpredictably, increasing the risk it will strike nearby workers or structures

88. A section of a building is being demolished using mechanical equipment, with debris falling unpredictably from upper floors. What should be established around the demolition area to protect workers not directly involved in the task?

• A. A verbal instruction telling uninvolved workers to stay a reasonable distance away from the demolition
• B. A physically marked exclusion zone or barricade that keeps uninvolved workers out of the debris fall area
• C. A requirement that any uninvolved worker simply wear a hard hat while passing directly through the debris fall area
• D. No additional measures beyond what already exists, since the equipment operator can see the general area

89. A worker is operating a piece of powered mobile equipment with a known blind spot directly behind it, on a site where foot traffic is common. What combination of practices best reduces struck-by risk in this situation?

• A. Using a backup alarm along with a spotter or clear visual confirmation before moving in the blind spot direction
• B. Increasing the vehicle's travel speed so the equipment spends less total time moving through the work area
• C. Relying only on the vehicle's factory mirrors, on the assumption that they cover the full blind spot behind the machine
• D. Requiring pedestrians on foot to listen for the engine sound before they cross behind the equipment

90. A flagger is directing traffic around a road construction zone adjacent to active lanes of travel. What type of clothing is this worker required to wear to reduce struck-by risk from passing vehicles?

• A. Standard dark-colored work clothing, chosen for contrast against the light-colored pavement surface
• B. Insulated clothing rated for electrical protection near energized conductors on the roadway
• C. High-visibility apparel designed to make the worker easily seen by drivers
• D. Waterproof clothing intended only to protect the flagger against rain and weather, nothing else

91. A mobile crane is lifting and swinging steel beams into place on an active site. What should ground workers do regarding the crane's swing radius while the lift is underway?

• A. Stay within the swing radius but keep facing the load directly at all times during the lift
• B. Position themselves directly under the suspended load to help the rigger guide it into place by hand signals
• C. Stay clear of the crane's swing radius and the area beneath the suspended load while it is moving
• D. Assume distance from the swing radius only matters for lifts that exceed a certain load weight

92. Workers are performing tasks at height on a platform above an area where other crew members walk and work below. What control most directly reduces the risk of a dropped tool striking someone below?

• A. Posting a sign at ground level that simply warns passersby of the overhead work taking place
• B. Requiring everyone walking below the platform to wear steel-toe boots for the rest of the shift
• C. Scheduling all of the ground-level work for a different day, with no other change to the platform itself
• D. Toe boards, tool tethers, or debris netting that keep tools and materials from falling off the platform

93. A worker needs to walk behind a parked dump truck to retrieve a tool just as the driver starts the engine and prepares to back up. What should the worker do?

• A. Stay out of the area behind the truck and make sure the driver sees them before approaching, since the space behind large vehicles is often a blind spot
• B. Quickly grab the tool from behind the truck and step away again before the driver has finished starting the engine and shifts the vehicle into reverse gear
• C. Knock once on the truck's side panel so the driver has some indication that a worker is standing somewhere nearby
• D. Walk behind the truck to retrieve the tool as long as they move quickly enough to beat the vehicle

94. Masonry work is being performed several stories up on a building facade, with a public sidewalk directly below. What should be installed to protect people below from falling debris?

• A. Nothing extra is needed on the sidewalk as long as the masons up on the facade work carefully
• B. A single caution sign posted at the base of the building, near the entrance closest to the sidewalk
• C. An overhead protective structure or debris netting, along with barricading the sidewalk area below
• D. Hard hats handed out to pedestrians walking past the building on the public sidewalk below

95. A crew is performing utility work along the shoulder of an active roadway. What measures help protect workers from being struck by passing traffic?

• A. High-visibility apparel and proper traffic control, such as cones, signs, and flaggers where needed
• B. Working only at night on the theory that there is less glare for drivers to contend with then
• C. Relying on drivers to notice the orange traffic barrels lining the shoulder entirely on their own
• D. Positioning a single worker to watch for oncoming cars without putting any of the other listed controls in place

96. A carpenter using a pneumatic nail gun keeps a finger resting on the trigger while repositioning the tool between shots on a framing crew. What hazard does this habit create?

• A. No hazard exists at all, since the tool's contact safety tip is designed to prevent the gun from firing unless it is pressed firmly against a piece of wood
• B. This particular hazard only exists on older nail gun models with a worn or poorly maintained trigger mechanism
• C. This habit only matters if the nail gun happens to already be disconnected from its compressed air supply hose
• D. Keeping a finger on the trigger risks an unintended discharge if the tool contacts something, such as another worker, while being repositioned

97. Concrete blocks are stacked on site without being cross-tied or banded, reaching a height taller than the workers walking past them. What is the concern with this storage method?

• A. There is no concern at all as long as the block stack is resting on reasonably level ground
• B. Stack height only becomes a concern for materials that are being stored inside a building
• C. The concern with the tall stack only applies if the concrete blocks themselves happen to be wet
• D. An unstable, un-cross-tied stack can topple and strike workers walking nearby

98. Forecasted high winds are expected to pick up during the afternoon on a site with loose sheet materials and scaffolding partially assembled. What should the crew do in response?

• A. Secure or remove loose materials and evaluate whether work at height should be suspended as winds increase
• B. Wait until the wind is already blowing strongly before the crew takes any action at all
• C. Continue work exactly as scheduled, since wind rarely affects material that is already stored on the ground
• D. Assume that only the workers on the ground need to take any precautions as the wind picks up

99. A backhoe is operating on site with its cab and boom rotating through a wide arc as it excavates. A ground worker walks close behind the machine to reach a tool cart. What is the hazard in this situation?

• A. There is no hazard here as long as the worker stays positioned directly behind the backhoe's tracks rather than its cab
• B. The machine's rotating superstructure can swing into the space behind it, striking anyone standing in that arc
• C. The swing hazard only exists during the moments when the backhoe's bucket is actively cutting into the ground
• D. Ground workers near a backhoe are only ever at risk from the bucket, not the rest of the machine

100. A worker on an elevated platform is using a wrench to tighten bolts, with coworkers passing on the ground below. What is a simple way to reduce the risk of the wrench striking someone below if it's dropped?

• A. Working faster so the wrench spends less total time actually in the worker's hand overhead
• B. Attaching the tool to a tool lanyard or tether so it can't fall freely if dropped
• C. Warning coworkers below once at the very start of the shift and never mentioning the hazard again
• D. Choosing a lighter wrench so a drop would cause less force if it struck someone below