CDL Hazmat Endorsement Practice Test 2026: Test de práctica 4

1. Pregunta 1 de 15

   You stop near a vehicle carrying flammable liquid. What warning devices should you use?

   • AFusees placed behind the vehicle
   • BBurning flares set close to the truck
   • CReflective triangles or red electric lights
   • DOpen-flame lanterns on the road
   Ver respuesta

   Respuesta: C. Reflective triangles or red electric lights

   Never use burning flares or fusees near flammable cargo. Use reflective triangles or red electric lights.

2. Pregunta 2 de 15

   Which routes should placarded hazmat vehicles avoid when possible?

   • ACrowded areas, tunnels and narrow streets
   • BSigned truck routes and bypasses
   • CRoads with truck stops and rest areas
   • DInterstate highways and freeways
   Ver respuesta

   Respuesta: A. Crowded areas, tunnels and narrow streets

   Unless there is no practical choice, avoid heavily populated areas, crowds, tunnels and narrow streets.

3. Pregunta 3 de 15

   What must the carrier give a driver hauling Division 1.1, 1.2 or 1.3 explosives?

   • AOnly a road map and the delivery address
   • BNothing beyond the normal shipping papers
   • COnly a spare set of placards for the trip
   • DA written route plan, the rules, and emergency instructions
   Ver respuesta

   Respuesta: D. A written route plan, the rules, and emergency instructions

   Carriers must give the driver a written route plan, a copy of Part 397, and emergency procedures, and the driver signs for them.

4. Pregunta 4 de 15

   What special equipment must you carry when hauling chlorine in a cargo tank?

   • AA gas can and a hand pump
   • BAn approved gas mask and a leak kit
   • CSnow chains and extra cross-links
   • DA spare battery and jumper cables
   Ver respuesta

   Respuesta: B. An approved gas mask and a leak kit

   Drivers hauling chlorine must have an approved gas mask and an emergency kit for leaks.

5. Pregunta 5 de 15

   Which book helps emergency workers decide what to do with a hazmat spill?

   • AThe model CDL manual
   • BThe vehicle owner's manual
   • CThe driver's daily logbook
   • DThe Emergency Response Guidebook
   Ver respuesta

   Respuesta: D. The Emergency Response Guidebook

   The DOT Emergency Response Guidebook is used by firefighters and police. It is indexed by shipping name and ID number.

6. Pregunta 6 de 15

   You are in a hazmat crash. What should you do with the shipping papers?

   • ALeave them locked inside the trailer
   • BThrow them away to avoid confusion
   • CKeep them and give them to responders
   • DHide them in the cab to protect them
   Ver respuesta

   Respuesta: C. Keep them and give them to responders

   Emergency workers need the shipping papers to know what is in the load.

7. Pregunta 7 de 15

   After a hazmat crash or leak, where should you keep people?

   • AClose by to help
   • BDownwind of the spill
   • CInside the trailer
   • DFar away and upwind
   Ver respuesta

   Respuesta: D. Far away and upwind

   Keep people far away from the scene and upwind of the material.

8. Pregunta 8 de 15

   Material is leaking from a package. What should you NOT do?

   • ACall for help right away
   • BTouch or smell the material
   • CWarn others of the danger
   • DKeep people away from it
   Ver respuesta

   Respuesta: B. Touch or smell the material

   Never touch or smell leaking material. Find out what it is from the shipping papers and labels.

9. Pregunta 9 de 15

   Should a driver fight a hazmat fire?

   • ANot unless trained and equipped to do so
   • BYes, by opening the trailer to let smoke out
   • CYes, with any extinguisher
   • DYes, always with water
   Ver respuesta

   Respuesta: A. Not unless trained and equipped to do so

   Don't try to fight hazardous materials fires unless you have the right training and equipment.

10. Pregunta 10 de 15

    There may be a fire in your trailer. What should you do before opening the doors?

    • AOpen them quickly to check the load
    • BSpray water in through a small crack
    • CFeel the doors for heat; don't open if hot
    • DDrive faster so the wind cools it
    Ver respuesta

    Respuesta: C. Feel the doors for heat; don't open if hot

    Opening hot doors can feed a fire with air. Feel for heat first.

11. Pregunta 11 de 15

    After a crash, how far should explosives be moved from vehicles and occupied buildings?

    • AAt least 200 feet
    • BAt least 50 feet
    • CAt least 1 mile
    • DAt least 10 feet
    Ver respuesta

    Respuesta: A. At least 200 feet

    If it is safe to unload them, place explosives at least 200 feet from vehicles and occupied buildings.

12. Pregunta 12 de 15

    What is the phone number of the National Response Center?

    • A1-888-373-7888
    • B911 only
    • C1-800-424-9300
    • D1-800-424-8802
    Ver respuesta

    Respuesta: D. 1-800-424-8802

    The National Response Center, 1-800-424-8802, takes reports of hazmat spills and passes them to the right agencies.

13. Pregunta 13 de 15

    What is CHEMTREC?

    • AA type of placard used on tank trucks
    • BA hazard class for chemical waste
    • CA 24-hour hazmat emergency information center
    • DA brand of dry chemical fire extinguisher
    Ver respuesta

    Respuesta: C. A 24-hour hazmat emergency information center

    CHEMTREC is a 24-hour center that gives emergency workers technical information about hazardous materials.

14. Pregunta 14 de 15

    After a leak of radioactive material, when may the vehicle be used again?

    • ARight away, once the leaking package is removed
    • BAfter it is washed down with plenty of water
    • CAfter it is parked outside for at least 24 hours
    • DOnly after it is cleaned and checked with a meter
    Ver respuesta

    Respuesta: D. Only after it is cleaned and checked with a meter

    Notify your dispatcher. The vehicle may not be used until it is decontaminated and checked.

15. Pregunta 15 de 15

    Which of these is part of the driver's role at a hazmat emergency?

    • AKeeping people away and warning responders
    • BMoving leaking packages by hand
    • CDriving the vehicle away from the scene
    • DCleaning up the spill alone right away
    Ver respuesta

    Respuesta: A. Keeping people away and warning responders

    Keep people away, limit the spread only if you can do it safely, communicate the danger, and give information to responders.

Teclado: 1–4 para responder, Intro para la siguiente pregunta.

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