HazMat Hazardous Materials (HazMat) Endorsement Theory 4 — Questions and Answers
Question 1: What is a 'Division 1.1' explosive?
- An explosive with a minor blast hazard
- A mass explosion hazard explosive (Correct answer)
- An explosive that projects fragments only
- A fire hazard explosive with no blast
Correct answer: A mass explosion hazard explosive
Division 1.1 explosives are those that present a mass explosion hazard, meaning the entire load could detonate at once.
Question 2: When transporting hazardous materials, a driver is required to have a hazmat endorsement on their CDL for which situation?
- Only when carrying explosives
- Whenever transporting any quantity of a material requiring a placard (Correct answer)
- Only for loads exceeding 1,000 pounds of hazardous materials
- Only for interstate transport of hazardous materials
Correct answer: Whenever transporting any quantity of a material requiring a placard
A CDL with hazmat endorsement is required any time a driver transports a quantity of hazardous materials that requires placards.
Question 3: What background investigation is required to obtain a hazmat endorsement on a CDL?
- A state criminal background check only
- A TSA security threat assessment including an FBI fingerprint-based criminal history check (Correct answer)
- A credit check and financial background review
- A medical examination by a certified DOT physician
Correct answer: A TSA security threat assessment including an FBI fingerprint-based criminal history check
All hazmat endorsement applicants must pass a TSA security threat assessment, which includes an FBI fingerprint-based criminal history records check.
Question 4: What does 'CHEMTREC' provide to hazmat drivers and emergency responders?
- Insurance coverage for chemical spills
- 24-hour emergency chemical information and assistance (Correct answer)
- Hazmat route planning and mapping services
- CDL hazmat endorsement training courses
Correct answer: 24-hour emergency chemical information and assistance
CHEMTREC provides 24-hour emergency assistance and chemical safety information to emergency responders dealing with hazmat incidents.
Question 5: Which of the following materials requires the driver to have special written routes approved before transport?
- Class 3 flammable liquids in quantities over 1,000 gallons
- Highway route-controlled quantities of radioactive materials (Correct answer)
- Any hazardous materials load exceeding 10,000 pounds
- Division 6.1 poisons transported in bulk
Correct answer: Highway route-controlled quantities of radioactive materials
Drivers transporting highway route-controlled quantities of radioactive materials must follow a pre-approved, specific route.
Question 6: What action must a driver take if a tire on a vehicle carrying hazardous materials goes flat or catches fire?
- Continue driving at reduced speed to the nearest repair shop
- Stop, remove the tire, and continue on remaining tires
- Park, check the tire, and do not continue until the tire is safe and the load is secure (Correct answer)
- Alert the next vehicle using CB radio and continue driving
Correct answer: Park, check the tire, and do not continue until the tire is safe and the load is secure
If a tire fails on a hazmat vehicle, the driver must park safely and not continue until the tire situation is resolved and the hazmat load remains secure.
Question 7: What is the significance of the four-digit identification number displayed on a placard or orange panel?
- It identifies the truck's DOT inspection status
- It identifies the specific hazardous material being transported for emergency response purposes (Correct answer)
- It indicates the maximum weight of the cargo
- It shows the driver's hazmat certification level
Correct answer: It identifies the specific hazardous material being transported for emergency response purposes
The four-digit ID number identifies the specific hazardous material, allowing emergency responders to look up proper response procedures in the ERG.
HazMat Hazardous Materials (HazMat) Endorsement Theory 4
What is a 'Division 1.1' explosive?