CDL Hazmat Endorsement Practice Test 2026: Teste prático 3

1. Pergunta 1 de 25

   When loading or unloading explosives or flammable liquids, what should you do with the engine?

   • ARun it to keep the cab warm
   • BLeave it running at a high idle
   • CTurn it off unless it runs a pump
   • DStart it every few minutes
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   Resposta: C. Turn it off unless it runs a pump

   Turn off the engine when loading or unloading explosives or flammable liquids, unless you need it to run a pump.

2. Pergunta 2 de 25

   What is the rule about cargo heaters when you carry explosives, flammable liquids or flammable gases?

   • AThey are required in winter
   • BThey are allowed if the load is small
   • CThey are generally not allowed
   • DThey must be on high
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   Resposta: C. They are generally not allowed

   Cargo heaters are generally banned for explosives, flammable liquids and flammable gases.

3. Pergunta 3 de 25

   What kind of cargo space must you use for explosives, flammable solids and oxidizers?

   • AAny space, as long as the load is tied
   • BAn open flatbed with the load hanging over
   • CA closed space, with no overhanging load
   • DThe driver's cab, where you can watch it
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   Resposta: C. A closed space, with no overhanging load

   These materials must be in a closed cargo space. Overhanging or tailgate loads are not allowed.

4. Pergunta 4 de 25

   What kind of floor lining is required when loading explosives?

   • ANo lining is ever needed
   • BA wet rubber mat
   • CA steel plate
   • DA lining with no steel or iron
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   Resposta: D. A lining with no steel or iron

   Floor linings for explosives must not contain steel or iron, which can make sparks.

5. Pergunta 5 de 25

   How must you handle explosives packages?

   • AThrow them gently onto the trailer
   • BStack them as high as possible
   • CNever drop, throw or roll them
   • DSlide them on sharp edges
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   Resposta: C. Never drop, throw or roll them

   Handle explosives carefully. Keep them away from sharp points and never drop, throw or roll them.

6. Pergunta 6 de 25

   Which combination may NOT carry Division 1.1 or 1.2 explosives?

   • AA van with closed doors
   • BA tractor with one semitrailer
   • CA triples combination
   • DA single straight truck
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   Resposta: C. A triples combination

   Division 1.1 or 1.2 explosives may not be carried in a triples combination.

7. Pergunta 7 de 25

   For radioactive materials, what is the most total transport index allowed on one vehicle?

   • A500
   • B100
   • C50
   • D10
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   Resposta: C. 50

   The total transport index of all radioactive packages on one vehicle must not be more than 50.

8. Pergunta 8 de 25

   Where must packages labeled POISON never be carried?

   • AIn the cab or sleeper, or with food
   • BOn a pallet with other freight
   • CIn a closed, locked trailer
   • DAt the front of the trailer
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   Resposta: A. In the cab or sleeper, or with food

   Never carry poison packages in the cab or sleeper, or in the same vehicle with foodstuffs.

9. Pergunta 9 de 25

   Where may nitric acid be loaded?

   • AAnywhere in the trailer
   • BNot above any other product
   • COnly on top of other products
   • DOnly in the cab
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   Resposta: B. Not above any other product

   Never load nitric acid above any other product.

10. Pergunta 10 de 25

    Which materials may not be loaded or stored with acids?

    • APaper
    • BCyanides
    • CCotton
    • DSand
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    Resposta: B. Cyanides

    Cyanides must not be loaded or stored with acids.

11. Pergunta 11 de 25

    How should you load glass carboys of corrosive liquid?

    • AUpright, one at a time
    • BOn their sides, stacked high
    • CSeveral at once by dropping them in
    • DUpside down
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    Resposta: A. Upright, one at a time

    Load corrosive carboys by hand, one by one, keeping them upright.

12. Pergunta 12 de 25

    A hazmat package is leaking at the dock. What should you do?

    • APut it in the cab to watch it
    • BLoad it at the back of the trailer
    • CDo not accept or transport it
    • DTape it and drive
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    Resposta: C. Do not accept or transport it

    Never transport leaking packages. Refuse them.

13. Pergunta 13 de 25

    On the segregation table, what does an X mean for two hazard classes?

    • AThey may not be loaded together
    • BThey may be loaded together
    • CThey must ride in the cab
    • DThey need extra placards
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    Resposta: A. They may not be loaded together

    An X means the materials may not be loaded on the same vehicle. An O means they must be separated so they cannot mix.

14. Pergunta 14 de 25

    A placarded vehicle comes to a railroad crossing. Where must it stop?

    • AIt does not need to stop at all
    • B15 to 50 feet from the nearest rail
    • CRight at the edge of the first rail
    • DAt least 100 feet from the tracks
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    Resposta: B. 15 to 50 feet from the nearest rail

    Placarded vehicles and certain hazmat cargo tanks must stop within 50 feet of, and not closer than 15 feet to, the tracks.

15. Pergunta 15 de 25

    What must you never do while driving across railroad tracks with a hazmat load?

    • AShift gears
    • BLook both ways
    • CUse a low gear
    • DKeep moving
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    Resposta: A. Shift gears

    Do not shift gears while crossing the tracks.

16. Pergunta 16 de 25

    When must a vehicle with Division 1.1, 1.2 or 1.3 explosives be attended?

    • AOnly when parked longer than one hour
    • BOnly on public roads
    • CAt all times
    • DOnly at night
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    Resposta: C. At all times

    A vehicle carrying these explosives must be attended at all times by the driver or another qualified person.

17. Pergunta 17 de 25

    Under the attendance rule, when is a hazmat vehicle attended?

    • AWhen the engine is running and the flashers are on, even if no one is near
    • BWhen you are awake in it (not in the sleeper) or within 100 feet with a clear view
    • CWhen the doors are locked and the alarm is set, even if you are inside a store
    • DWhen someone from the company is within 1 mile and can be reached by phone
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    Resposta: B. When you are awake in it (not in the sleeper) or within 100 feet with a clear view

    Attended means you are awake in the vehicle and not in the sleeper berth, or within 100 feet with the vehicle in clear view.

18. Pergunta 18 de 25

    How close to the traveled part of a road may you park a vehicle with Division 1.1, 1.2 or 1.3 explosives?

    • ARight on the road edge
    • BNo closer than 5 feet
    • C10 feet only at night
    • DNo closer than 1 mile
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    Resposta: B. No closer than 5 feet

    Do not park explosives vehicles on or within 5 feet of the traveled part of a road.

19. Pergunta 19 de 25

    Except for brief stops, how far must a vehicle with Division 1.1, 1.2 or 1.3 explosives park from bridges, tunnels and buildings?

    • AAt least 300 feet
    • BAt least 100 feet
    • CAt least 1,000 feet
    • DAt least 25 feet
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    Resposta: A. At least 300 feet

    These vehicles may not park within 300 feet of a bridge, tunnel, dwelling or place where people work or gather, except briefly.

20. Pergunta 20 de 25

    How close to an open fire may a placarded hazmat vehicle park?

    • ANo closer than 25 feet
    • BThere is no rule
    • CNo closer than 50 feet
    • DNo closer than 300 feet
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    Resposta: D. No closer than 300 feet

    Do not park a hazmat vehicle within 300 feet of an open fire.

21. Pergunta 21 de 25

    While fueling a hazmat vehicle, what must happen?

    • AThe driver waits inside the store
    • BEngine off, and someone at the nozzle
    • CEngine running, to keep power on
    • DThe tank is filled right to the top
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    Resposta: B. Engine off, and someone at the nozzle

    Turn off the engine, and a person must control the fueling at the point where the tank is filled.

22. Pergunta 22 de 25

    When must you check the tires on a hazmat vehicle?

    • AOnly when a tire looks low or flat
    • BOnly at the end of each trip
    • CAt the start of each trip and each time you park
    • DOnce a week, at the company yard
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    Resposta: C. At the start of each trip and each time you park

    Inspect each tire at the beginning of each trip and each time the vehicle is parked.

23. Pergunta 23 de 25

    You find an overheated tire on a hazmat vehicle. What must you do?

    • ALet some air out and keep on driving
    • BRemove it and move it a safe distance away
    • CDrive faster so air flow cools it
    • DSpray it with water and keep driving
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    Resposta: B. Remove it and move it a safe distance away

    An overheated tire must be removed right away and placed a safe distance away. Fix the cause before driving.

24. Pergunta 24 de 25

    A tire on your hazmat vehicle is flat. What may you do?

    • ADrive at normal speed until it overheats
    • BLet air out of the other tires
    • CDrive to your destination
    • DDrive only to the nearest safe place to fix it
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    Resposta: D. Drive only to the nearest safe place to fix it

    A flat or leaking tire must be fixed before driving, but you may drive to the nearest safe place to repair it.

25. Pergunta 25 de 25

    What size fire extinguisher must a placarded vehicle carry?

    • AOne rated 1 A or more
    • BOne rated 2 B:C or more
    • COne rated 10 B:C or more
    • DAny size at all
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    Resposta: C. One rated 10 B:C or more

    Power units of placarded vehicles must have a fire extinguisher rated 10 B:C or more.

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O exame real: Varies by state; usually 30 questions, with 24 correct needed (80%)