OSHA 10 Construction Practice Test 2026: Test d’entraînement 2

1. Question 1 sur 25

   At what height must workers on a scaffold be protected from falls?

   • AMore than 4 feet above a lower level
   • BMore than 10 feet above a lower level
   • CMore than 6 feet above a lower level
   • DMore than 20 feet above a lower level
   Voir la réponse

   Réponse: B. More than 10 feet above a lower level

   Under 1926.451(g)(1), fall protection is required on scaffolds more than 10 feet above a lower level.

2. Question 2 sur 25

   When must a competent person inspect a scaffold for visible defects?

   • AOnly when it is first built
   • BOnce a year
   • CBefore each work shift
   • DOnce a month
   Voir la réponse

   Réponse: C. Before each work shift

   Scaffolds and their components must be inspected by a competent person before each shift and after any occurrence that could affect structural integrity.

3. Question 3 sur 25

   How much load must a scaffold be able to support?

   • AIts own weight and 4 times the maximum intended load
   • BTwice its own weight, but no extra load
   • CHalf the maximum intended load, for safety
   • DExactly the maximum intended load, and no more
   Voir la réponse

   Réponse: A. Its own weight and 4 times the maximum intended load

   Each scaffold and component must support its own weight and at least 4 times the maximum intended load.

4. Question 4 sur 25

   Who may erect, move or dismantle a scaffold?

   • AAnyone, as long as they wear a harness
   • BTrained workers supervised by a competent person
   • CAny worker who needs to use it that day
   • DOnly the owner of the site
   Voir la réponse

   Réponse: B. Trained workers supervised by a competent person

   Scaffolds must be erected, moved, dismantled or altered only under the supervision and direction of a competent person.

5. Question 5 sur 25

   Can you use concrete blocks or loose bricks to support a scaffold?

   • AYes, if the blocks are brand new
   • BYes, for short jobs only
   • CYes, if the ground is level
   • DNo, unstable objects must not be used
   Voir la réponse

   Réponse: D. No, unstable objects must not be used

   Scaffolds need firm footing, such as base plates and mud sills. Unstable objects like loose bricks can crumble.

6. Question 6 sur 25

   A portable ladder is used to reach an upper landing. How far must its side rails extend above the landing?

   • AAt least 3 feet
   • BThey should stop at the landing
   • CAt least 6 inches
   • DAt least 1 foot
   Voir la réponse

   Réponse: A. At least 3 feet

   Under 1926.1053(b)(1), side rails must extend at least 3 feet above the upper landing surface.

7. Question 7 sur 25

   At what angle should a non-self-supporting ladder be set?

   • AAbout 1/2 of the working length out from the wall
   • BAbout 1/4 of the working length out from the wall (4 to 1)
   • CStraight up, flat against the wall
   • DAlways 2 feet out, whatever the length
   Voir la réponse

   Réponse: B. About 1/4 of the working length out from the wall (4 to 1)

   The horizontal distance from the top support to the foot should be about one-quarter of the working length.

8. Question 8 sur 25

   Can you stand on the top step of a stepladder?

   • AYes, if someone holds the ladder at the bottom
   • BNo, the top or top step must not be used as a step
   • CYes, for short tasks of a few minutes
   • DYes, if the ladder is new and in good shape
   Voir la réponse

   Réponse: B. No, the top or top step must not be used as a step

   OSHA forbids using the top or top step of a stepladder as a step.

9. Question 9 sur 25

   How should you face when climbing up or down a ladder?

   • AAway from the ladder
   • BIt does not matter
   • CToward the ladder
   • DSideways
   Voir la réponse

   Réponse: C. Toward the ladder

   When going up or down a ladder, the user must face the ladder.

10. Question 10 sur 25

    How many hands must you use to grasp the ladder while climbing?

    • AExactly two at all times
    • BNone, if the ladder is tied off
    • CAt least one
    • DNone, if you are carrying tools
    Voir la réponse

    Réponse: C. At least one

    Each worker must use at least one hand to grasp the ladder when moving up or down. Do not carry loads that could make you lose balance.

11. Question 11 sur 25

    What must happen to a ladder with a broken rung?

    • ATag it "Do Not Use" and take it out of service
    • BLeave it for someone else to deal with
    • CSkip over the broken rung
    • DKeep using it, but carefully
    Voir la réponse

    Réponse: A. Tag it "Do Not Use" and take it out of service

    Defective ladders must be tagged or marked and withdrawn from service until repaired.

12. Question 12 sur 25

    What kind of ladder must you use where you could contact exposed energized electrical equipment?

    • AA steel ladder
    • BAn aluminum ladder
    • CAny ladder, if you wear gloves
    • DOne with nonconductive side rails
    Voir la réponse

    Réponse: D. One with nonconductive side rails

    Ladders must have nonconductive side rails if the worker or ladder could contact exposed energized electrical equipment.

13. Question 13 sur 25

    At what break in elevation must a stairway or ladder be provided at access points?

    • A6 feet or more
    • B6 inches or more
    • C19 inches or more
    • D36 inches or more
    Voir la réponse

    Réponse: C. 19 inches or more

    Under 1926.1051(a), a stairway or ladder is required at points of access where there is a break in elevation of 19 inches or more.

14. Question 14 sur 25

    What does a ground-fault circuit interrupter (GFCI) do?

    • AIt stores power for use later
    • BIt changes the voltage from 120 to 240 volts
    • CIt cuts power fast when current leaks to ground
    • DIt makes power tools run faster and cooler
    Voir la réponse

    Réponse: C. It cuts power fast when current leaks to ground

    GFCIs detect ground faults and cut power fast. 1926.404(b)(1) requires GFCIs or an assured equipment grounding conductor program on construction sites.

15. Question 15 sur 25

    You find an extension cord with cracked insulation. What should you do?

    • ABury it so no one trips on it
    • BUse it only in dry weather
    • CRemove it from service and report it
    • DWrap it in tape and keep using it
    Voir la réponse

    Réponse: C. Remove it from service and report it

    Damaged cords can expose live wires. Take them out of service until repaired or replaced.

16. Question 16 sur 25

    How should you treat overhead power lines on a job site?

    • AIgnore them if they are high up
    • BTouch them with a wooden pole to check if they are live
    • CAssume they are dead unless they spark
    • DAssume they are energized and keep a safe distance
    Voir la réponse

    Réponse: D. Assume they are energized and keep a safe distance

    Contact with overhead lines is a leading cause of electrocution. Always assume lines are live.

17. Question 17 sur 25

    Under OSHA's crane rules, what is the minimum clearance from power lines up to 50 kV?

    • A50 feet
    • B2 feet
    • C10 feet
    • D5 feet
    Voir la réponse

    Réponse: C. 10 feet

    Table A of 1926.1408 lists a 10-foot minimum clearance for voltages up to 50 kV. Higher voltages need more distance.

18. Question 18 sur 25

    Before working on electrical equipment, what must be done?

    • ATurn the tool off at its own switch only
    • BWear rubber boots and work on it while it is still live
    • CThe circuit must be de-energized and locked or tagged out
    • DAsk a coworker to stand by the breaker panel
    Voir la réponse

    Réponse: C. The circuit must be de-energized and locked or tagged out

    Locking out and tagging the circuit stops someone from switching it on while you work.

19. Question 19 sur 25

    Why is using electric tools in wet conditions dangerous?

    • AWater makes it easier for current to flow through your body
    • BWater is only a problem for battery-powered tools
    • CWater makes tools too quiet to hear when running
    • DWater makes tools rust and stop working at once
    Voir la réponse

    Réponse: A. Water makes it easier for current to flow through your body

    Wet conditions raise the risk of shock. Use GFCI protection and tools rated for the conditions.

20. Question 20 sur 25

    What should you wear when working near moving vehicles or traffic?

    • AHeadphones to block out traffic noise
    • BDark clothing so you blend in
    • CHigh-visibility clothing, such as a vest
    • DLoose clothing for comfort
    Voir la réponse

    Réponse: C. High-visibility clothing, such as a vest

    High-visibility garments help drivers and operators see you.

21. Question 21 sur 25

    A crane is lifting a load. Where should you never stand?

    • AOutside the swing radius
    • BUnder the suspended load
    • CBehind a barricade
    • DIn the break area
    Voir la réponse

    Réponse: B. Under the suspended load

    Loads can slip or fall. Stay out from under suspended loads and outside barricaded swing areas.

22. Question 22 sur 25

    A vehicle on site has an obstructed view to the rear. What must it have before backing up?

    • AA loud radio in the cab
    • BA working reverse alarm, or an observer
    • CNothing, if the driver backs up slowly
    • DA warning sticker on the bumper
    Voir la réponse

    Réponse: B. A working reverse alarm, or an observer

    Under 1926.601(b)(4), vehicles with an obstructed rear view need a reverse alarm audible above surrounding noise, or an observer.

23. Question 23 sur 25

    How can you keep tools and materials from falling on workers below?

    • AThrow tools down to the ground instead of carrying them down the ladder
    • BShout a warning to people below after something falls
    • CUse toeboards, screens or tool lanyards, and keep materials away from edges
    • DStack materials at the edge so they are easy to reach
    Voir la réponse

    Réponse: C. Use toeboards, screens or tool lanyards, and keep materials away from edges

    Falling objects are a major struck-by hazard. Prevent them falling and protect people below.

24. Question 24 sur 25

    When must workers wear hard hats?

    • AWhen there is a danger of head injury
    • BOnly on their first day of work
    • COnly when it is raining
    • DOnly when an inspector is on site
    Voir la réponse

    Réponse: A. When there is a danger of head injury

    Under 1926.100(a), protective helmets are required wherever there is a possible danger of head injury.

25. Question 25 sur 25

    When is eye or face protection required?

    • AWhen flying particles or chemicals could injure the eyes or face
    • BOnly for supervisors and site visitors
    • COnly when welding or cutting at night under work lights
    • DOnly when the sun is very bright outside
    Voir la réponse

    Réponse: A. When flying particles or chemicals could injure the eyes or face

    Under 1926.102, employers must provide eye and face protection when operations present a potential eye or face injury.

Clavier : 1–4 pour répondre, Entrée pour la question suivante.

L’examen réel : No public OSHA exam bank. The authorized trainer or online provider runs the course and issues the DOL card.