OSHA 10 Practice Test.
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1. 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 doctrine, which only applies to general contractors
- C. State-plan preemption, which removes federal OSHA authority
- D. The Hazard Communication Standard, which covers only chemical hazards
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Answer: A
When no specific standard covers a recognized hazard, OSHA can still enforce safety through the General Duty Clause, which obligates every employer to keep the workplace free of hazards likely to cause death or serious physical harm; the other choices describe narrower or unrelated legal mechanisms that would not fill this particular gap.2. A crew includes several workers whose primary language is not English. What does OSHA require regarding their safety training?
- A. Training is only required for supervisors, not for the workers themselves
- B. Training may be given only in English if written materials are also provided
- C. Training and instructions must be presented in a language and vocabulary the workers can understand
- D. Workers must arrange for their own translation before attending training
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Answer: C
Safety training is only effective if workers actually comprehend it, so OSHA requires that instruction be delivered in a language and at a vocabulary level the employees understand; shifting that burden onto the worker or limiting the requirement to supervisors would leave the workers who most need protection unable to recognize hazards.3. 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. A recordable incident, which only affects how the injury is logged later
- B. A jurisdictional dispute, which must be resolved by the state labor board first
- C. An imminent danger situation, in which the worker may refuse the task under specific legal conditions
- D. A minor hazard, which the worker must complete while filing a complaint afterward
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Answer: C
When a hazard poses a real and immediate threat of death or serious harm and there's no time to get it corrected through standard OSHA procedures, this qualifies as an imminent danger, and the worker may have grounds to refuse the task; the other terms describe unrelated recordkeeping or jurisdictional concepts that don't grant a right to refuse work.4. 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, but only for employers working on federal government contracts
- B. Yes, only employers with 50 or more employees are covered
- C. No, OSHA coverage depends solely on annual company revenue
- D. No, OSHA coverage generally extends to nearly all private-sector employers regardless of size
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Answer: D
OSHA's protections generally apply broadly across private-sector workplaces without a minimum employee-count exemption, so a small contractor is just as covered as a large one; tying coverage to headcount, revenue, or federal contract status misstates how broadly the law was designed to reach.5. 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 imminent danger provision
- B. The recordkeeping requirement for injuries
- C. The worker's right to know about chemical hazards through labels and safety data sheets
- D. The multi-employer doctrine
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Answer: C
OSHA's hazard communication principle gives workers the right to know what chemicals they may be exposed to through container labeling and safety data sheets, along with training on associated hazards, rather than learning safety practices informally by copying coworkers; the other options describe separate rights unrelated to chemical hazard information.6. 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. 39 to 45 inches
- B. 24 to 30 inches
- C. 48 to 60 inches
- D. 30 to 36 inches
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Answer: A
Standard guardrail top rails are generally required to sit between 39 and 45 inches above the working surface, a height chosen to catch a falling worker at roughly waist level; a rail set lower or much higher would fail to reliably stop a fall or would interfere with normal work movement.7. 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 ladder, a spotter, and a hand signal system
- B. An anchorage point, a full-body harness, and a connecting device such as a lanyard
- C. A hard hat, safety glasses, and steel-toe boots
- D. A guardrail, a toe board, and a warning line
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Answer: B
A personal fall arrest system depends on three linked components: a secure anchorage capable of holding the load, a full-body harness worn by the worker, and a connecting device like a lanyard or self-retracting lifeline joining the two; if any one piece is missing or inadequate, the whole system fails to arrest a fall, and the other listed items are unrelated PPE or separate fall-protection methods rather than components of this specific system.8. 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 only needs to hold the static weight of the worker standing still
- B. It needs no engineering evaluation as long as it is bolted to any part of the structure
- C. It must simply be higher than the worker's head at all times
- D. 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
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Answer: D
Because a falling body generates forces far greater than its static weight, an anchor point must be engineered or verified to withstand the substantial arresting forces involved, per worker attached, or be part of a system designed by a qualified person; assuming any bolted point or mere elevation above the worker's head is adequate ignores the dynamic loading a real fall produces.9. 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. Carry tools in both hands to keep the ladder steady
- B. Climb quickly to minimize total time on the ladder
- C. Maintain three points of contact with the ladder at all times
- D. Face away from the ladder while descending for better visibility
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Answer: C
Keeping three points of contact, two hands and one foot, or two feet and one hand, at all times while climbing keeps the worker stable and able to catch themselves if they slip, which is why tools should be carried in a pouch or hoisted separately rather than held in the hands; facing away from the ladder or rushing the climb increases the chance of losing balance and falling.10. 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. 4 feet
- B. 15 feet
- C. 20 feet
- D. 10 feet
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Answer: D
Scaffold platforms generally require fall protection, such as guardrails or personal fall arrest systems, once workers are exposed to a fall of ten feet or more, a somewhat different threshold than the general construction fall-protection trigger; using a lower or much higher number would either be overly conservative or leave workers exposed on tall but unprotected platforms.11. 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. Leave the openings open only during daylight hours
- B. Cover the openings with material strong enough to support anticipated loads, or guard them with a standard railing
- C. Mark the openings with paint so workers can avoid stepping near them
- D. Post a sign warning of the hazard instead of physically protecting it
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Answer: B
Floor holes and skylights must be physically covered with material capable of supporting the loads that might be placed on them, or otherwise guarded with a standard railing, because a worker who steps onto an unmarked or thinly covered opening can fall straight through; paint markings and warning signs rely on workers noticing and remembering a hazard rather than physically preventing a fall.12. 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 hard hat rated for impact protection
- B. A single handrail installed only at the access ladder
- C. A safety net system positioned to catch a falling worker
- D. A warning line placed at the exact roof edge
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Answer: C
When conventional fall protection like guardrails is impractical, a properly rigged safety net system is a recognized method that arrests a fall after it happens by catching the worker before they hit a lower level; a hard hat protects against head impacts rather than falls, and a warning line or single handrail at the ladder does not provide coverage across an open roof area.13. 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. A verbal warning from the supervisor at the start of each shift
- B. A stairway, ladder, ramp, or similar means of access at that point
- C. A rope strung across the gap as a visual reminder
- D. Nothing extra, since workers can simply step down carefully
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Answer: B
When there's a substantial break in elevation along a route workers regularly travel, a proper means of access such as a stairway, ladder, or ramp is needed so workers aren't forced to jump or climb down an unprotected edge; relying on a rope reminder or verbal warning does nothing to physically support a safe transition between the two levels.14. 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 ground-fault circuit interrupters (GFCIs) on temporary receptacles
- B. Using only extension cords rated for indoor use
- C. Relying on workers to visually inspect cords before every single use as the sole protection
- D. Wrapping exposed wiring with electrical tape instead of replacing damaged cords
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Answer: A
Ground-fault circuit interrupters detect small current leaks and cut power fast enough to prevent a lethal shock, which is why they're a standard protection for temporary construction power; taping over damaged insulation or relying purely on visual inspection does nothing to stop current from reaching a worker once a fault actually occurs, and cord ratings for indoor use don't address ground-fault protection at all.15. 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. Use it only in dry weather conditions to reduce risk
- C. Wrap it once with tape and use it only for the remainder of the shift
- D. Remove it from service and have it repaired or replaced before further use
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Answer: D
Damaged cords with exposed conductors create a direct shock and arc-flash risk, so the correct response is to take the cord out of service until it's properly repaired or replaced rather than continuing to use it under any condition; temporary tape fixes or limiting use to dry weather don't restore the cord's insulation integrity and leave the underlying hazard in place.16. 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. Working quickly to minimize exposure time
- B. Wearing insulated gloves while the equipment remains energized
- C. Lockout/tagout, which de-energizes and secures the equipment before work begins
- D. Posting a verbal reminder to coworkers not to touch the equipment
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Answer: C
Lockout/tagout procedures isolate an energy source and physically lock it out, with a tag identifying who applied it, so the equipment cannot be unexpectedly re-energized or started while someone is working on it; verbal reminders and working quickly don't remove the actual risk of stored or restored energy, and insulated gloves address contact risk but not the underlying possibility of re-energization.17. 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. Repetitive stress injury
- B. Slips on wet office flooring
- C. Exposure to office noise levels
- D. Electrocution from contact with energized sources
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Answer: D
Electrocution from contact with power lines, damaged wiring, or energized equipment is one of construction's widely taught leading causes of worker deaths, alongside falls, struck-by, and caught-in/between hazards; the other listed items describe lower-severity or non-construction-specific concerns rather than one of these four leading fatality categories.18. 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. Wearing a hard hat rated for impact protection
- B. Switching to a longer extension cord so the outlet is farther away
- C. Ensuring the circuit is protected by a GFCI and keeping cords and connections out of the standing water
- D. Using the tool only during the middle of the day
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Answer: C
Water dramatically increases the risk of a lethal shock because it conducts electricity so readily, so the most direct protection is ensuring GFCI protection is in place and keeping cords, plugs, and connections away from the wet area entirely; a longer cord or a specific time of day does nothing to address the conductivity hazard, and a hard hat protects against impact, not electrical shock.19. 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 is not connected to a live circuit
- B. Treat unidentified wiring as energized until it has been properly tested and verified de-energized
- C. Test only with a coworker present, but proceed without verifying it's de-energized
- D. Cut into the wiring carefully at a slow pace to see if there's a reaction
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Answer: B
Because there is no reliable way to know the status of unlabeled wiring just by looking at it, the safest and standard approach is to treat it as energized until proper testing confirms otherwise, using appropriate test equipment before any work begins; assuming it's dead, having a coworker merely present, or cutting in slowly all leave the worker exposed to potential contact with live current.20. 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 provide hearing protection from nearby equipment noise
- B. To provide fall protection if the worker trips
- C. To protect the head from impact by falling objects such as tools or debris
- D. To shield the eyes from flying particles
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Answer: C
A hard hat's core function is to absorb and deflect the impact of objects falling from above, which is exactly the risk a worker faces when walking under an elevated work area; it does not provide hearing or eye protection, and it plays no role in preventing or arresting a fall.21. 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 once before starting to reverse
- B. Painting the back of the truck a bright color
- C. Restricting backing maneuvers to only the beginning of the shift
- D. Using a designated spotter with a clear line of sight and communication with the driver
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Answer: D
A trained spotter positioned with a clear view of the truck's path and reliable communication with the driver can actively watch for workers and stop the maneuver if someone enters the danger zone, addressing the driver's limited rear visibility directly; a single horn sound, a paint job, or limiting backing to certain times of day don't provide the ongoing, real-time awareness needed to prevent a strike.22. 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, not bystanders
- B. Workers within the swing radius can be struck or crushed by the rotating body or boom of the machine
- C. It only creates noise exposure, not a physical strike hazard
- D. It is a hazard only when the bucket is fully loaded
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Answer: B
The area a piece of equipment's body and boom sweep through as it rotates is a genuine strike and crush hazard for anyone standing inside that zone, regardless of whether the bucket is loaded, so barricading or otherwise keeping workers clear of the swing radius is essential; framing this as only a noise issue or an operator-only concern ignores the physical space the machine occupies as it turns.23. 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. A hard hat rated for impact from above
- B. Steel-toe boots
- C. Hearing protection
- D. Safety glasses or a face shield providing eye and face protection
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Answer: D
Flying metal fragments from cutting or grinding travel outward toward the worker's face and eyes, so safety glasses or a face shield are the PPE specifically designed to intercept those particles before they cause injury; boots, hard hats, and hearing protection all guard against different hazards and provide no defense against fragments flying at eye level.24. 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. Only move away once the load is directly overhead
- B. Approach the load to help guide it into position by hand
- C. Continue normal work as long as they are wearing a hard hat
- D. Stay clear of the area beneath and around the suspended load's travel path
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Answer: D
A suspended load can shift, swing, or drop unexpectedly due to rigging failure or crane movement, so workers should stay clear of the entire path the load will travel, not just the spot directly beneath it at any given moment; wearing a hard hat reduces injury severity but doesn't prevent being struck, and guiding a load by hand or waiting until it's already overhead both put workers directly in the danger zone.25. 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 has no effect on rigid steel or concrete loads
- B. Wind speed only affects worker comfort, not safety
- C. Wind only matters for lifts performed at night
- D. High winds can cause a suspended load to swing or spin unpredictably, increasing the risk it will strike nearby workers or structures
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Answer: D
As wind speed increases, a suspended load, even a heavy or rigid one, can catch enough force to swing, rotate, or drift off its intended path, creating a strike hazard for workers and nearby structures that wasn't present in calm conditions; assuming wind only affects comfort or that rigid loads are immune to wind ignores the real physical forces at play once a load is off the ground.26. 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. Requiring pedestrians to listen for the engine sound before crossing
- B. Relying only on the vehicle's mirrors, since they cover all blind spots
- C. Using a backup alarm along with a spotter or clear visual confirmation before moving in the blind spot direction
- D. Increasing the vehicle's speed so it spends less time in the area
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Answer: C
Combining an audible backup alarm with a spotter or direct visual confirmation addresses a mobile equipment blind spot from two directions at once, warning nearby workers and giving the operator active confirmation the path is clear, which mirrors alone typically cannot fully cover; increasing speed makes a strike more severe rather than less likely, and expecting pedestrians to identify equipment purely by engine sound is unreliable on a noisy site.27. 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. A competent person must reinspect the excavation for new hazards caused by the rain before work resumes
- B. Workers can enter as long as the walls appear dry on the surface
- C. Work can resume immediately since the protective system was already inspected once
- D. Only the trench box needs to be visually checked from a distance
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Answer: A
Rain and other events can rapidly change soil conditions and destabilize a trench that was previously safe, so a competent person needs to reinspect the excavation for new hazards like water accumulation or wall softening before anyone reenters; assuming a prior inspection still applies, checking only from a distance, or judging safety by whether the surface looks dry all overlook how quickly conditions can change underground after a storm.28. 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. It only matters for keeping the site visually organized
- B. It is only a concern if the spoil pile blocks a walkway
- C. Spoil piles have no effect on trench stability once the trench is shored
- D. Material piled too close to the edge adds weight that can increase the risk of a wall collapse
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Answer: D
Soil and debris piled close to a trench's edge add extra surcharge weight on top of the very wall that's supporting the excavation, which can push it past the point of failure and trigger a collapse, so keeping spoil set back a safe distance from the edge reduces that added stress; assuming the shoring system fully neutralizes this extra weight, or that the concern is purely about walkway clutter, misunderstands how surcharge loading contributes to cave-ins.29. Before workers enter a deep trench where hazardous gases could accumulate below grade, what atmospheric precaution should typically be taken?
- A. The atmosphere should be tested for oxygen levels and hazardous gases before entry
- B. A visual check for discoloration of the soil is sufficient
- C. None, since atmospheric hazards only occur in fully enclosed confined spaces
- D. Testing is only required if workers report feeling dizzy after entering
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Answer: A
Deeper trenches can accumulate low oxygen levels or hazardous gases from underground sources, so testing the atmosphere for oxygen content and toxic or flammable gases before workers enter is the correct precaution, rather than waiting for a worker to already show symptoms of exposure; a visual soil check cannot detect an invisible gas hazard, and assuming atmospheric risk is limited to fully enclosed spaces overlooks how gases can pool in an open trench as well.30. 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 machine should be shut down and locked out before any attempt to clear the jam
- C. The worker should use a long tool to avoid direct hand contact, while the machine keeps running
- D. The worker should ask a coworker to watch and warn them if the machine restarts
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Answer: B
Reaching into machinery with moving parts while it retains any potential to start or continue moving creates a serious caught-in hazard, so the correct step is to shut the machine down and lock it out so it cannot unexpectedly engage while a worker's hands or tools are inside it; timing a reach between cycles, relying on a coworker's warning, or using a tool while the machine still runs all leave the worker exposed to the machinery's motion.31. 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 health hazard, prevented by wearing a respirator
- B. An electrocution hazard only, prevented by GFCI protection
- C. A struck-by hazard, prevented by wearing a hard hat
- D. A caught-in hazard, prevented by properly locking out the equipment's energy source before entry
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Answer: D
A worker positioned inside equipment with a rotating component that could unexpectedly restart faces a classic caught-in hazard, where being pulled into or pinned by moving machinery is the primary risk, and the correct prevention is properly locking out the machine's energy source so it cannot restart while the worker is inside; a hard hat, GFCI protection, or a respirator each address a different hazard entirely and do nothing to stop the auger from moving.32. A worker is using a grinder that produces sparks and small chips flying toward their face. What PPE addresses this specific hazard?
- A. Eye and face protection, such as safety glasses or a face shield
- B. Steel-toe boots
- C. A respirator
- D. Hearing protection
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Answer: A
Sparks and flying chips travel toward the face and eyes during grinding, so eye and face protection is the PPE directly designed to block that specific hazard; boots protect the feet, a respirator addresses airborne contaminants, and hearing protection addresses noise, none of which stop particles from reaching the eyes.33. A worker operates a jackhammer for extended periods each day, generating sustained high noise levels near their ears. What type of PPE is specifically intended to protect against this exposure?
- A. Hearing protection, such as earplugs or earmuffs
- B. A hard hat with a face shield attachment
- C. A high-visibility vest
- D. Cut-resistant gloves
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Answer: A
Earplugs or earmuffs are specifically designed to reduce the level of sound reaching the inner ear, directly addressing the risk of noise-induced hearing damage from prolonged exposure to loud equipment like a jackhammer; a hard hat with a face shield, gloves, and a high-visibility vest each protect against entirely different hazards and provide no meaningful reduction in noise exposure.34. 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. A full-body harness
- D. Steel-toe boots
Show answer & explanation
Answer: C
A full-body harness distributes the force of a fall arrest across the shoulders, thighs, and torso, which is why it's required as the worker's connection point in a personal fall arrest system rather than a simple body belt, which concentrates arresting forces at the waist and can cause serious internal injury during a fall; the other listed items are unrelated PPE that play no role in fall arrest force distribution.35. A laborer will be moving heavy materials across a site where dropped tools and rolling debris are a common hazard to the feet. What PPE most directly protects against this hazard?
- A. Regular sneakers, since foot protection is only necessary in cold weather
- B. Protective footwear, such as steel-toe or composite-toe boots rated for impact and compression
- C. Knee pads, since they cushion the lower body during lifting
- D. A tool belt, to keep tools off the ground and out of the way
Show answer & explanation
Answer: B
Protective footwear such as steel-toe or composite-toe boots is specifically designed to guard the feet against impact from dropped objects and compression from rolling or heavy loads, which directly addresses the hazard described here; regular sneakers offer no such protection, knee pads guard a different part of the body, and a tool belt is an organizational item rather than protective equipment for the feet.36. A crew is cutting and grinding concrete on a regular basis without using water suppression or ventilation controls. What health hazard is this activity most likely to create over time?
- A. Increased risk of frostbite
- B. Increased risk of contact dermatitis only
- C. Exposure to respirable crystalline silica dust, which can cause serious lung disease
- D. Increased risk of carbon monoxide poisoning
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Answer: C
Cutting and grinding concrete releases fine silica-containing dust particles small enough to be inhaled deep into the lungs, and repeated exposure over time is linked to serious, irreversible lung disease, which is why water suppression and ventilation controls are used to reduce airborne dust; frostbite and carbon monoxide poisoning are unrelated to this activity, and while dust can irritate skin, the primary and most serious hazard here is respiratory.37. 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 only affects the ear that was closer to the noise source
- B. It is always temporary and fully reverses after a period of rest
- C. It has no connection to the duration of noise exposure
- D. It can be cumulative over time and permanent once it occurs
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Answer: D
Noise-induced hearing loss from repeated exposure to loud equipment builds up gradually and, once the damage to the inner ear occurs, it is generally permanent rather than something that resolves with rest, which is exactly why consistent hearing protection matters over a long career rather than only during especially loud tasks; assuming the damage always reverses, is limited to one ear, or is unrelated to how long exposure lasts all misunderstand how this type of hearing loss develops.38. A renovation crew working in an older building suspects that some pipe insulation and ceiling tiles may contain a hazardous fiber material commonly used decades ago. What is the recommended approach if this material is suspected?
- A. Remove the material quickly using standard tools to limit exposure time
- B. Avoid disturbing the material and have it properly tested and handled by trained personnel
- C. Continue work as planned since the material is likely inactive after so many years
- D. Cover the material with plastic sheeting and continue working on top of it
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Answer: B
Materials like old pipe insulation and ceiling tiles can contain asbestos, and disturbing suspected asbestos-containing material releases fibers that cause serious, irreversible lung disease when inhaled, so the correct response is to avoid disturbing it and have it properly tested and handled by personnel trained for that specific hazard; quickly removing it, assuming it's inactive with age, or simply covering it with plastic all risk releasing or trapping fibers without addressing the underlying exposure hazard.39. A worker spends most of the workday repeatedly bending, twisting, and lifting materials in an awkward posture to complete a task. Over time, what type of health issue is this pattern of movement most likely to contribute to?
- A. Respiratory illness from physical exertion
- B. Hearing loss from repeated motion
- C. Acute chemical burns
- D. Musculoskeletal disorders from repetitive strain and awkward posture
Show answer & explanation
Answer: D
Repeated bending, twisting, and lifting in awkward positions places cumulative stress on muscles, joints, and the spine, and over time this pattern is a well-recognized contributor to musculoskeletal disorders; it has no connection to chemical burns or hearing loss, and while heavy exertion can affect breathing in the moment, it does not by itself cause respiratory illness the way ergonomic strain contributes to musculoskeletal injury.40. 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 is protected from retaliation for filing a safety complaint or reporting a hazard
- B. The worker must first resolve the issue directly with the employer before OSHA can get involved
- C. The worker loses whistleblower protection if they file the complaint anonymously
- D. The worker can only be protected if the hazard has already caused an injury
Show answer & explanation
Answer: A
OSHA law prohibits employers from firing, demoting, or otherwise retaliating against workers for raising safety concerns or filing complaints, and this protection applies whether or not an injury has already occurred; requiring prior negotiation with the employer or proof of harm would undermine the purpose of encouraging early hazard reporting.41. 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. Access is limited to workers who were personally injured during that period
- B. Employees have the right to access their employer's injury and illness records upon request
- C. Only OSHA inspectors, not employees, are permitted to view these records
- D. They may only view records with written permission from the employer's insurance carrier
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Answer: B
Employees and their representatives have a right to see the injury and illness records their employer is required to keep, since transparency about workplace hazards helps workers make informed decisions; restricting access to only injured workers or requiring insurer approval would defeat that purpose.42. 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 has no duty to act since it did not create the hazard
- B. The general contractor can be held responsible for failing to correct a hazard it controls or should have detected
- C. Only the subcontractor that created the hazard can ever be held responsible
- D. Responsibility is decided only at the end of the project during final inspection
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Answer: B
On multi-employer worksites, a controlling contractor that has the authority to correct hazards can be held responsible for failing to address a hazard it knew about or should have discovered through reasonable inspection, even if a different employer's crew created it; assuming only the creating employer can ever be liable ignores the general contractor's oversight role.43. 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. 6 feet
- B. 10 feet
- C. 4 feet
- D. 15 feet
Show answer & explanation
Answer: A
In construction, fall protection is generally required once a worker is exposed to a fall of six feet or more to a lower level, which is a lower threshold than in general industry settings; choosing a taller trigger height would leave workers exposed at a height construction standards consider dangerous enough to require protection.44. 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 distance is irrelevant as long as the ladder is tied off at the top
- C. The base should touch the wall directly for maximum stability
- D. The base should be about one-quarter of the working ladder length away from the wall
Show answer & explanation
Answer: D
A commonly taught rule of thumb sets the ladder's base about one foot away from the wall for every four feet of height to the upper support point, producing a stable climbing angle; placing the base flush against the wall creates too steep an angle and risk of tipping backward, while a fixed two-foot distance ignores that the correct spacing scales with the ladder's length.45. 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
Show answer & explanation
Answer: B
A toe board is a low barrier installed along the base of an elevated platform's edge specifically to stop tools, debris, and materials from sliding or rolling off onto workers below, while the top rail and midrail are positioned higher to stop a falling person rather than small loose objects; a vertical support post simply holds the rail system up and provides no barrier function of its own.46. 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 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
- B. It only needs to be installed on one side of the roof
- C. It can be placed at any distance from the edge as long as it is brightly colored
- D. It replaces the need for any additional protection once installed, regardless of distance from the edge
Show answer & explanation
Answer: A
A warning line system is only effective when it is placed a sufficient distance back from the edge to give workers a real buffer, and any work performed between the line and the edge still needs additional protection like a monitor or personal fall arrest; treating the line alone as sufficient protection at any distance, or on only part of the roof, ignores the exposure that remains near the unprotected edge.47. 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 as close as needed to complete the lift efficiently, since most lines are insulated
- C. Clearance distance only matters when the crane is actually lifting a load
- D. Only maintain clearance if the lines appear to be sagging or damaged
Show answer & explanation
Answer: A
Overhead lines should always be treated as energized unless the utility has confirmed and verified de-energization, so crews maintain a substantial minimum clearance at all times the equipment is in the vicinity, not just during an active lift; assuming lines are insulated or that clearance only matters while lifting ignores how easily contact or arcing can occur with any part of the crane, including the boom while swinging or traveling.48. 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. An added layer of protection by isolating the internal wiring, without needing a separate grounding conductor
- B. Protection only when used with a GFCI, and no benefit otherwise
- C. The same protection as wearing rubber-soled boots, making boots unnecessary
- D. Complete immunity from any electrical hazard, eliminating the need for other precautions
Show answer & explanation
Answer: A
A double-insulated tool has two independent layers of insulation protecting the user from the internal live parts, which is why it doesn't rely on a grounding conductor the way a standard tool does; however, it isn't a substitute for other electrical safety practices, and none of the other options accurately describe how this specific protection works or its limits.49. 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. It can block required clear access to the panel needed for safe operation or emergency shutoff
- B. It is fine as long as the materials are non-flammable
- C. There is no concern as long as the panel door remains closed
- D. It is only a problem if the panel is labeled as high voltage
Show answer & explanation
Answer: A
Electrical panels need clear, unobstructed access so a worker can quickly reach a breaker to shut off power in an emergency or perform routine work safely, so stacking materials in front of one, even non-flammable items, creates a hazard by blocking that access; the panel being closed or unlabeled doesn't change the need for clear approach space at all times.50. 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. High-visibility apparel designed to make the worker easily seen by drivers
- B. Insulated clothing rated for electrical protection
- C. Standard dark-colored work clothing for visibility against the pavement
- D. Waterproof clothing to protect against weather only
Show answer & explanation
Answer: A
High-visibility apparel with reflective or fluorescent material is specifically designed to make a worker stand out to approaching drivers, especially in low light or at a distance, which directly reduces the chance of being struck by a passing vehicle; dark clothing does the opposite of what's needed, and insulated or waterproof clothing addresses different hazards entirely, not visibility to traffic.51. 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 trench
- B. Nothing extra, since a trench this size is considered shallow
- C. A warning sign posted at the entrance to the site
- D. A protective system such as sloping, shoring, or shielding, unless the trench is in stable rock
Show answer & explanation
Answer: D
Trenches at or beyond a certain depth threshold require a protective system like sloping the walls, installing shoring, or using a shield/trench box, unless the excavation is entirely in stable rock, because unsupported trench walls at that depth can collapse suddenly and bury a worker; treating a trench this deep as shallow or relying on a sign or a single ladder does nothing to prevent the walls themselves from caving in.52. 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
- B. No egress feature is required as long as the trench has a shoring system
- C. A rope thrown down from ground level when needed
- D. Ladders or ramps spaced so that workers never have to travel too far laterally to reach one
Show answer & explanation
Answer: D
In a trench of meaningful depth and length, ladders, ramps, or other exits need to be spaced along the trench so that no worker has to travel an excessive lateral distance to escape in an emergency, since a single distant exit or an improvised rope thrown down after the fact wastes critical time during a collapse or flooding event; having a shoring system addresses wall stability, not the separate need for a quick way out.53. 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 automatically adjusts to trenches of any depth without modification
- B. It protects workers inside the shielded area but does not necessarily prevent the surrounding soil from collapsing outside or above it
- C. It eliminates the need for any atmospheric testing inside the trench
- D. It removes the need for a competent person to inspect the excavation
Show answer & explanation
Answer: B
A trench box shields workers from being crushed by a collapse within its protected zone, but it doesn't stabilize or prevent soil movement outside or above the shield itself, so the box must be sized and positioned correctly and workers should still stay within its protection; assuming it eliminates the need for testing, inspection, or depth-specific setup misunderstands that shielding is one part of an overall protective approach, not a complete substitute for it.54. 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 C
- C. Class G
- D. There is no hard hat class rated for any electrical protection
Show answer & explanation
Answer: A
Hard hats are generally categorized by the level of electrical protection they provide, and the class intended for higher-voltage electrical work offers protection against contact with energized conductors, unlike the class designed mainly for general impact protection or the class made largely of conductive material with no electrical rating at all; assuming no hard hat class addresses electrical hazards overlooks that this is a specific, well-known design category.55. 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. Earplugs, since dust exposure is primarily an ear 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. An appropriate respirator selected for the specific airborne hazard
Show answer & explanation
Answer: D
When engineering controls alone don't fully control fine dust exposure, an appropriately selected respirator provides direct protection against inhaling the hazardous particles, matched to the specific contaminant and exposure level; a face shield or safety glasses protect the eyes and face from impact or splash but don't filter what a worker breathes in, and earplugs address noise, not airborne dust.56. A new worker asks who is responsible for paying for most required personal protective equipment on a construction site. What is generally true under OSHA's PPE requirements?
- A. PPE costs are always split evenly between employer and worker
- B. PPE is only provided free if the worker requests it in writing
- C. The employer must generally provide most required PPE at no cost to the employee
- D. The worker must always purchase their own PPE before starting work
Show answer & explanation
Answer: C
OSHA generally places the responsibility on employers to provide most required personal protective equipment at no cost to employees, recognizing that making workers pay for their own safety equipment could discourage its use or create financial barriers to compliance; splitting costs, requiring a written request first, or expecting workers to buy their own gear before starting all shift that basic protection burden onto the worker in a way the standard does not support.57. A worker will be handling materials with sharp edges throughout the day, including cutting wire mesh and moving jagged debris. What consideration should guide the choice of gloves for this task?
- A. Gloves are optional if the worker has experience handling sharp materials
- B. Any glove is acceptable as long as it fits snugly
- C. Gloves should be selected based on the specific hazard, such as choosing cut-resistant material for sharp-edged work
- D. Leather gloves are unnecessary if the worker also wears long sleeves
Show answer & explanation
Answer: C
Hand protection needs to match the actual hazard present, so a task involving sharp edges and jagged materials calls for gloves made of cut-resistant material rather than any general-purpose glove, since a poor match can still allow cuts or punctures through the material; assuming fit alone matters, that experience replaces the need for gloves, or that sleeves substitute for proper hand protection all ignore that the glove's material must suit the specific hazard.58. Workers are performing physically demanding tasks outdoors during a hot summer afternoon. What combination of practices most directly reduces their risk of heat-related illness?
- A. Wearing heavier clothing to help the body regulate temperature
- B. Frequent water breaks, access to shade or cooling, and gradual acclimatization to the heat
- C. Working through scheduled breaks to finish the task sooner
- D. Drinking cold beverages with caffeine to stay alert
Show answer & explanation
Answer: B
Preventing heat illness depends on giving the body what it needs to regulate temperature under exertion, regular hydration, opportunities to cool down in shade, and time for the body to adjust to working in heat, while skipping breaks, wearing heavier clothing, or relying on caffeinated drinks all work against the body's ability to cool itself and can make heat stress worse rather than better.59. A crew removing old paint from a bridge structure discovers the paint may have been applied decades ago. Why might this be a specific health concern beyond ordinary paint dust?
- A. Age has no effect on the health risk of paint dust
- B. Older paint may contain lead, which can cause serious health effects if inhaled or ingested as dust or fumes
- C. Older paint dust is a concern only for pregnant workers
- D. Older paint is only a fire hazard, not a health hazard
Show answer & explanation
Answer: B
Paint applied many decades ago may contain lead, and disturbing it during removal can release lead-containing dust or fumes that pose serious health risks if inhaled or ingested, which is why this task often requires special precautions and monitoring beyond routine painting work; treating the age of the paint as irrelevant, framing it purely as a fire hazard, or assuming the risk applies only to one group of workers all overlook the broader lead-exposure concern this situation raises for anyone disturbing the material.60. A worker needs to enter a below-grade vault to inspect equipment, and the space has only one small entry point with limited airflow. Before entry, what type of hazard specifically needs to be evaluated due to the space's characteristics?
- A. Only the risk of noise exposure from equipment inside
- B. Only the risk of falling objects from above
- C. Only the risk of electrical shock from nearby wiring
- D. The potential for a hazardous atmosphere, such as low oxygen or toxic gas buildup, due to limited airflow
Show answer & explanation
Answer: D
A confined space with limited airflow and restricted entry can develop a hazardous atmosphere, low oxygen, toxic gases, or even flammable vapors, that isn't necessarily obvious just by looking inside, which is why atmospheric evaluation before entry is critical, separate from other hazards like falling objects, shock, or noise that might also be present but aren't specific to this space's airflow characteristics.61. A worker is about to use a chemical product for the first time and wants to know what protective measures and hazards are associated with it. Where should they look for this information before starting the task?
- A. The container's color, which universally indicates the hazard level
- B. The product's Safety Data Sheet (SDS), which describes hazards and recommended precautions
- C. The manufacturer's general advertising materials
- D. A coworker's personal opinion based on past experience with a similar-looking product
Show answer & explanation
Answer: B
A Safety Data Sheet is specifically required to accompany hazardous chemical products and details the hazards, handling precautions, and PPE recommendations a worker needs before starting a task, making it the authoritative source of this information; advertising materials aren't designed to convey safety information, container color has no universal hazard meaning across products, and a coworker's informal impression of a similar-looking product isn't a reliable substitute for checking the actual product's documented hazards.
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Key facts: OSHA 10 exam
The OSHA 10 is administered by U.S. Department of Labor — OSHA Outreach Training Program, with a No exam — OSHA does not require a test for the completion card; any quiz pass/fail is at the individual trainer's discretion result.
This free OSHA 10 practice test has 61 original questions written to U.S. Department of Labor — OSHA Outreach Training Program's official content outline, last checked against it on August 9, 2026. Every question shows a worked explanation, and nothing here requires a signup.
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Official sources
Every exam fact on this page traces to a primary document published by the body that administers the exam.
- OSHA Outreach Training Program Requirements (Revised July 01, 2024; Effective October 01, 2024)U.S. Department of Labor — OSHA Outreach Training Programosha.gov
- OSHA Outreach Training Program — Construction Industry Procedures (Revised July 01, 2024; Effective October 01, 2024)U.S. Department of Labor — OSHA Outreach Training Programosha.gov
- OSHA Outreach Training Program FAQsU.S. Department of Labor — OSHA Outreach Training Programosha.gov
- Outreach Training ProgramU.S. Department of Labor — OSHA Outreach Training Programosha.gov
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Frequently asked questions
How many questions are on the OSHA 10 test?
There is no OSHA-required test for the 10-Hour Outreach course, so there is no set question count. Some trainers give an optional quiz to check understanding, but that is entirely at their discretion.
What score do I need to pass OSHA 10?
OSHA does not set a passing score for the 10-Hour Outreach course. Whether a student has successfully completed the class is left to the individual trainer's judgment, usually based on attendance and participation rather than a graded score.
What topics should I focus on when using OSHA 10 practice questions?
Since the course itself is graded on participation rather than a formal exam, practice questions are most useful for reinforcing the material trainers actually cover: the OSHA Focus Four Hazards, Introduction to OSHA, Health Hazards in Construction, and Personal Protective Equipment.
Is this OSHA 10 practice test free and does it require a signup?
Yes, the practice questions on this page are free to use and do not require creating an account. You can work through them as many times as you like while you prepare for your training session.
Do I need to study outside of class to complete OSHA 10 successfully?
Formal outside study is not required by OSHA, since the course has no mandatory exam. That said, reviewing key hazard topics beforehand can help you get more out of the required instructional hours and retain the material for the jobsite.
How is OSHA 10 different from studying for a licensing exam?
Unlike a licensing exam with a fixed question bank and passing score, OSHA 10 is a voluntary training program measured by instructional hours completed, not by test performance. Practice questions here are meant to build jobsite competence rather than to mimic a real exam.