HazMat Hazardous Materials (HazMat) Endorsement Operations 5 — Questions and Answers
Question 1: What is the primary purpose of the 'compatibility' rules for transporting hazardous materials?
- To reduce the total weight of hazardous cargo
- To prevent dangerous chemical reactions between different materials in the same vehicle (Correct answer)
- To simplify placarding requirements for mixed loads
- To standardize the placement of packages in the trailer
Correct answer: To prevent dangerous chemical reactions between different materials in the same vehicle
Compatibility rules are designed to prevent hazardous reactions such as fire, explosion, or toxic gas release when different materials are transported together.
Question 2: Which of the following best describes a 'bulk packaging' for hazardous materials?
- Any package weighing more than 100 lbs
- A single container with a capacity of 119 gallons or more for liquids (Correct answer)
- Any package transported on a flatbed trailer
- A package containing more than 10 individual units
Correct answer: A single container with a capacity of 119 gallons or more for liquids
Bulk packaging for liquids is a single container with a capacity of 119 gallons (450 liters) or more, such as a tank truck.
Question 3: If a HazMat driver is involved in an accident resulting in a spill, which organization must be notified?
- The EPA regional office only
- The National Response Center (NRC) (Correct answer)
- The state department of transportation only
- OSHA district office
Correct answer: The National Response Center (NRC)
Spills of hazardous materials that meet reporting thresholds must be reported to the National Response Center at 1-800-424-8802.
Question 4: What type of hazardous material is classified under Class 4, Division 4.2?
- Flammable solids
- Spontaneously combustible materials (Correct answer)
- Dangerous-when-wet materials
- Oxidizing solids
Correct answer: Spontaneously combustible materials
Division 4.2 covers pyrophoric materials and self-heating materials that are spontaneously combustible.
Question 5: How must a driver handle shipping papers when stopped and out of the vehicle during a HazMat transport?
- Lock them in the glove compartment
- Keep them in a pouch on the driver's door or on the driver's seat in plain sight (Correct answer)
- Store them with the cargo in the trailer
- Hand them to a supervisor at each stop
Correct answer: Keep them in a pouch on the driver's door or on the driver's seat in plain sight
When the driver is out of the cab, shipping papers must be in a pouch on the driver's door or left on the seat so emergency responders can find them immediately.
Question 6: Which hazard class placard must ALWAYS be displayed regardless of quantity?
- Class 3 — Flammable Liquids
- Class 9 — Miscellaneous Hazardous Materials
- Class 7 — Radioactive Materials (when the transport index requires it) and Class 1 — Explosives (Correct answer)
- Class 8 — Corrosives
Correct answer: Class 7 — Radioactive Materials (when the transport index requires it) and Class 1 — Explosives
Certain materials such as explosives (Class 1) and radioactive materials (Class 7, when applicable) must always be placarded regardless of quantity.
Question 7: What does the term 'proper shipping name' refer to on a HazMat shipping paper?
- The trade name of the product as sold by the manufacturer
- The standardized name listed in the Hazardous Materials Table (49 CFR 172.101) for identifying the material (Correct answer)
- The name assigned by the shipper for internal tracking
- The chemical formula of the hazardous material
Correct answer: The standardized name listed in the Hazardous Materials Table (49 CFR 172.101) for identifying the material
The proper shipping name is the standardized name from the Hazardous Materials Table in 49 CFR 172.101, which must be used on shipping papers, marks, and labels.
HazMat Hazardous Materials (HazMat) Endorsement Operations 5
What is the primary purpose of the 'compatibility' rules for transporting hazardous materials?