OSHA 10 Construction Practice Test 2026: الاختبار التدريبي 3

1. السؤال 1 من 30

   In general, at what depth must a trench have a protective system to prevent cave-ins?

   • A20 feet or deeper, in any type of soil
   • B10 feet or deeper, in any type of soil
   • C5 feet or deeper, unless in stable rock
   • D2 feet or deeper, in any type of soil
   أظهر الإجابة

   الإجابة: C. 5 feet or deeper, unless in stable rock

   Under 1926.652(a)(1), protective systems are required for excavations 5 feet or deeper, except in stable rock. Shallower trenches need one if a competent person sees signs of a cave-in.

2. السؤال 2 من 30

   For excavations deeper than 20 feet, who must design the protective system?

   • AThe property owner
   • BAny worker with an OSHA 10 card
   • CA registered professional engineer
   • DThe excavator operator
   أظهر الإجابة

   الإجابة: C. A registered professional engineer

   Sloping, benching and support systems for excavations over 20 feet deep must be designed by a registered professional engineer.

3. السؤال 3 من 30

   Which are the three main ways to protect workers in a trench from a cave-in?

   • ALadders, ropes and harnesses
   • BSloping, shoring and shielding
   • CSigns, cones and tape
   • DFans, lights and pumps
   أظهر الإجابة

   الإجابة: B. Sloping, shoring and shielding

   OSHA says to slope or bench the walls, shore them with supports, or shield workers with trench boxes.

4. السؤال 4 من 30

   In a trench 4 feet or deeper, how far may a worker have to travel to reach a ladder, stairway or ramp?

   • AAs far as needed
   • BNo more than 50 feet
   • CNo more than 25 feet
   • DNo more than 100 feet
   أظهر الإجابة

   الإجابة: C. No more than 25 feet

   Under 1926.651(c)(2), a safe means of egress must be within 25 feet of lateral travel in trenches 4 feet or more deep.

5. السؤال 5 من 30

   How far from the edge of an excavation must spoil piles and equipment be kept?

   • AThey can be placed right at the edge
   • BAt least 1 foot
   • CAt least 2 feet
   • DAt least 6 inches
   أظهر الإجابة

   الإجابة: C. At least 2 feet

   Under 1926.651(j)(2), materials and equipment must be at least 2 feet from the edge, or held back by retaining devices.

6. السؤال 6 من 30

   Who must inspect an excavation daily, before work starts and after rain?

   • AA competent person
   • BA city building inspector
   • CAny worker on site
   • DThe truck driver
   أظهر الإجابة

   الإجابة: A. A competent person

   Daily inspections of excavations, adjacent areas and protective systems must be made by a competent person.

7. السؤال 7 من 30

   A competent person finds a hazard in a trench. What must happen?

   • AWorkers must get out until it is made safe
   • BThe hazard is noted for next week
   • CWorkers keep going but work faster
   • DOnly new workers leave the trench
   أظهر الإجابة

   الإجابة: A. Workers must get out until it is made safe

   Under 1926.651(k)(2), exposed employees must be removed until the necessary precautions make the area safe.

8. السؤال 8 من 30

   When must the air in an excavation be tested before workers go in?

   • ANever, because trenches are open to the air
   • BOnly in the hot summer months
   • COnly when there is a bad smell coming from the trench
   • DWhen it is over 4 feet deep and bad air could be present
   أظهر الإجابة

   الإجابة: D. When it is over 4 feet deep and bad air could be present

   Under 1926.651(g)(1), testing is required before entry into such excavations deeper than 4 feet.

9. السؤال 9 من 30

   What must be done before digging begins?

   • AUse a pickaxe to feel for lines
   • BLook for pipes after hitting one
   • CNothing; just dig slowly
   • DLocate underground utilities (call 811)
   أظهر الإجابة

   الإجابة: D. Locate underground utilities (call 811)

   Under 1926.651(b), underground installations must be located before an excavation is opened. In the U.S., 811 is the call-before-you-dig number.

10. السؤال 10 من 30

    According to OSHA, what poses the greatest risk to workers' lives in trenching?

    • ASunburn
    • BCave-ins
    • CNoise from equipment
    • DMuddy boots
    أظهر الإجابة

    الإجابة: B. Cave-ins

    Cave-ins can bury and crush workers in seconds, which is why protective systems are required.

11. السؤال 11 من 30

    Why must guards stay in place on machines with moving parts?

    • AThey keep the machine warm in cold weather
    • BThey stop body parts and clothing getting caught
    • CThey make the machine look neat and finished
    • DThey make the machine run more quietly
    أظهر الإجابة

    الإجابة: B. They stop body parts and clothing getting caught

    Missing guards can lead to amputations and deaths. Never remove or bypass a guard.

12. السؤال 12 من 30

    How can you avoid being caught between moving equipment and a fixed object?

    • AStand close so the operator can see you
    • BWalk behind it while it backs up
    • CLean on the equipment to steady it
    • DNever stand between them
    أظهر الإجابة

    الإجابة: D. Never stand between them

    Being pinned between equipment and a wall or other object is a common caught-between death.

13. السؤال 13 من 30

    Who must provide PPE such as hard hats and safety glasses when OSHA standards require them?

    • AThe employer
    • BThe worker
    • CThe general public
    • DThe equipment rental company
    أظهر الإجابة

    الإجابة: A. The employer

    Under 1926.95, protective equipment must be provided, used and maintained wherever hazards make it necessary.

14. السؤال 14 من 30

    Before wearing a tight-fitting respirator, what do you need?

    • ANothing, any size will do
    • BOnly a quick look in the mirror
    • CA beard to help the seal
    • DA medical evaluation and a fit test
    أظهر الإجابة

    الإجابة: D. A medical evaluation and a fit test

    OSHA's respiratory protection rules require medical evaluation and fit testing before using tight-fitting respirators.

15. السؤال 15 من 30

    What is OSHA's permissible noise exposure limit in construction for an 8-hour day?

    • A120 dBA
    • B90 dBA
    • C60 dBA
    • D75 dBA
    أظهر الإجابة

    الإجابة: B. 90 dBA

    Table D-2 in 1926.52 sets 90 dBA for an 8-hour duration. Above the limit, controls and hearing protection are needed.

16. السؤال 16 من 30

    What is OSHA's permissible exposure limit for respirable crystalline silica in construction?

    • A50 micrograms per cubic meter (8-hour average)
    • B500 micrograms per cubic meter (8-hour average)
    • CThere is no exposure limit for silica
    • D5 milligrams per cubic meter (8-hour average)
    أظهر الإجابة

    الإجابة: A. 50 micrograms per cubic meter (8-hour average)

    The silica standard for construction, 1926.1153, sets a PEL of 50 µg/m³ as an 8-hour time-weighted average.

17. السؤال 17 من 30

    Which controls help reduce silica dust when cutting concrete?

    • AA leaf blower to blow the dust away from you
    • BWater spray or a vacuum dust collector on the tool
    • CDry sweeping the area every hour
    • DCutting faster so that less dust is made
    أظهر الإجابة

    الإجابة: B. Water spray or a vacuum dust collector on the tool

    Water and local vacuum extraction capture dust at the source. Dry sweeping and compressed air spread it.

18. السؤال 18 من 30

    What three things does OSHA's heat illness campaign remind workers they need?

    • ARadios, lights and alarms
    • BGloves, boots and helmets
    • CCoffee, music and snacks
    • DWater, rest and shade
    أظهر الإجابة

    الإجابة: D. Water, rest and shade

    Drinking water often, resting and getting into the shade help prevent heat illness.

19. السؤال 19 من 30

    Which information must appear on a HazCom shipping label for a hazardous chemical?

    • AThe name of the worker who will use it, the job site, the date and the supervisor
    • BOnly the price, the bar code, the store name, the date of sale and the batch number
    • CProduct identifier, signal word, hazard statements, pictograms, precautionary statements and supplier information
    • DOnly the product name, the date it was made, the batch number and the color
    أظهر الإجابة

    الإجابة: C. Product identifier, signal word, hazard statements, pictograms, precautionary statements and supplier information

    OSHA's Hazard Communication Standard lists these six label elements.

20. السؤال 20 من 30

    How many sections does a safety data sheet (SDS) have under OSHA's Hazard Communication Standard?

    • A16
    • B10
    • C25
    • D4
    أظهر الإجابة

    الإجابة: A. 16

    SDSs use a standard 16-section format, so information is always in the same place.

21. السؤال 21 من 30

    Which two signal words are used on HazCom labels?

    • A"Poison" and "Safe"
    • B"Caution" and "Notice"
    • C"Stop" and "Go"
    • D"Danger" and "Warning"
    أظهر الإجابة

    الإجابة: D. "Danger" and "Warning"

    "Danger" is used for more severe hazards and "Warning" for less severe hazards.

22. السؤال 22 من 30

    Is this environment pictogram required on labels under OSHA's Hazard Communication Standard?

    • AYes, but only on gas cylinders
    • BYes, on every label
    • CYes, but only for food products
    • DNo, it is non-mandatory under OSHA
    أظهر الإجابة

    الإجابة: D. No, it is non-mandatory under OSHA

    The GHS has nine pictograms, but OSHA lists the environment pictogram (aquatic toxicity) as non-mandatory.

23. السؤال 23 من 30

    What hazard does this pictogram show on a HazCom label?

    • AOxidizers
    • BCarcinogens
    • CFlammables
    • DCorrosives
    أظهر الإجابة

    الإجابة: C. Flammables

    The flame pictogram covers flammables, pyrophorics, self-heating materials and more.

24. السؤال 24 من 30

    What does this pictogram warn about on a HazCom label?

    • AHarm to fish and aquatic life
    • BMild skin irritation after contact
    • CAcute toxicity that can be fatal or toxic
    • DGas stored under pressure
    أظهر الإجابة

    الإجابة: C. Acute toxicity that can be fatal or toxic

    The skull and crossbones means the chemical can be fatal or toxic, even in small amounts.

25. السؤال 25 من 30

    Which hazards does this pictogram cover under HazCom?

    • AMild skin and eye irritation only
    • BExplosives and organic peroxides
    • CGases stored under pressure in cylinders
    • DCarcinogens, sensitizers and organ toxicity
    أظهر الإجابة

    الإجابة: D. Carcinogens, sensitizers and organ toxicity

    The health hazard pictogram is for serious health effects, often long-term.

26. السؤال 26 من 30

    What does this pictogram warn about?

    • ASkin burns, eye damage and metal corrosion
    • BHarmful effects on fish and water life
    • CFlammable gases and liquids
    • DGases stored under pressure
    أظهر الإجابة

    الإجابة: A. Skin burns, eye damage and metal corrosion

    The corrosion pictogram covers skin corrosion and burns, eye damage and corrosion of metals.

27. السؤال 27 من 30

    Which hazard does this pictogram cover?

    • AIrritants and skin sensitizers
    • BExplosion hazards
    • CCancer-causing chemicals
    • DFatal poisoning
    أظهر الإجابة

    الإجابة: A. Irritants and skin sensitizers

    The exclamation mark is used for less severe hazards, such as skin and eye irritation.

28. السؤال 28 من 30

    What does this pictogram on a cylinder mean?

    • AThe contents are frozen food
    • BThe contents are always toxic
    • CThe cylinder is empty
    • DThe contents are a gas under pressure
    أظهر الإجابة

    الإجابة: D. The contents are a gas under pressure

    The gas cylinder pictogram covers gases under pressure and chemicals under pressure.

29. السؤال 29 من 30

    What does this pictogram mean?

    • AAn oxidizer that can make a fire worse
    • BAn explosive that can blow up
    • CA chemical that is safe near heat
    • DA flammable liquid that burns easily
    أظهر الإجابة

    الإجابة: A. An oxidizer that can make a fire worse

    Oxidizers give off oxygen. Keep them away from fuels and other combustible materials.

30. السؤال 30 من 30

    Which hazards does this pictogram cover?

    • ACarcinogens
    • BCorrosives and acids
    • CExplosives and organic peroxides
    • DIrritants and sensitizers
    أظهر الإجابة

    الإجابة: C. Explosives and organic peroxides

    The exploding bomb shows a risk of explosion or violent reaction.

لوحة المفاتيح: 1–4 للإجابة، وEnter للسؤال التالي.

الاختبار الحقيقي: No public OSHA exam bank. The authorized trainer or online provider runs the course and issues the DOL card.