Commercial Driving Hazardous Materials 2 — Questions and Answers
Question 1: When transporting hazardous materials, at what minimum distance must you park from a tunnel or bridge?
- 100 feet
- 200 feet
- 300 feet (Correct answer)
- 500 feet
Correct answer: 300 feet
Federal regulations require that vehicles carrying hazardous materials park at least 300 feet away from bridges, tunnels, or buildings unless actively loading or unloading.
Question 2: If you discover a hazardous materials leak while en route, what is the correct first action?
- Continue to the nearest repair shop at reduced speed
- Drive to the delivery destination and report upon arrival
- Pull off the road safely, keep people away, and report immediately (Correct answer)
- Cover the leak with a tarp and proceed cautiously
Correct answer: Pull off the road safely, keep people away, and report immediately
A leaking hazmat shipment requires immediately stopping the vehicle in a safe location, preventing others from approaching, and notifying emergency responders.
Question 3: What is the Emergency Response Guidebook (ERG) used for?
- Filing accident reports with the DOT
- Identifying hazardous materials and providing emergency response guidance (Correct answer)
- Calculating the correct placard class for a shipment
- Documenting the driver's hours of service
Correct answer: Identifying hazardous materials and providing emergency response guidance
The ERG helps emergency responders quickly identify hazardous materials involved in an incident and guides initial protective actions during the first 30 minutes of a response.
Question 4: Who must certify on the shipping papers that a hazardous materials shipment is properly described and safe for transport?
- The driver
- The carrier's safety officer
- The shipper (Correct answer)
- A DOT-certified inspector
Correct answer: The shipper
The shipper must sign the hazardous materials certification statement, verifying the materials are correctly classified, packaged, marked, and labeled.
Question 5: Which hazard class includes poisonous and toxic materials?
- Class 4
- Class 5
- Class 6 (Correct answer)
- Class 7
Correct answer: Class 6
Class 6 covers poisonous (toxic) materials and infectious substances that can cause serious harm or death through inhalation, ingestion, or skin contact.
Question 6: When must you stop at a railroad crossing while transporting hazardous materials?
- Only when the crossing lights are flashing
- Only when carrying Class 1 explosives
- Always, before any railroad crossing (Correct answer)
- Only when visibility is poor
Correct answer: Always, before any railroad crossing
Drivers transporting hazardous materials are required by federal regulation to stop at all railroad crossings, regardless of whether any signals are activated.
Question 7: What does a Class 8 hazardous materials placard indicate?
- The cargo is flammable
- The cargo is corrosive (Correct answer)
- The cargo is explosive
- The cargo is radioactive
Correct answer: The cargo is corrosive
Class 8 identifies corrosive materials, which can chemically damage living tissue or metals, such as sulfuric acid and sodium hydroxide.
Commercial Driving Hazardous Materials 2
When transporting hazardous materials, at what minimum distance must you park from a tunnel or bridge?