CTS Hazardous Materials Transportation & Compliance 1 — Questions and Answers
Question 1: Which U.S. federal agency has primary authority over the safe transportation of hazardous materials by highway, rail, air, and water?
- OSHA
- PHMSA (Pipeline and Hazardous Materials Safety Administration) (Correct answer)
- EPA
- FMCSA
Correct answer: PHMSA (Pipeline and Hazardous Materials Safety Administration)
PHMSA, a division of the U.S. Department of Transportation, is the primary agency responsible for issuing and enforcing regulations governing hazardous materials transportation.
Question 2: How many hazard classes does the DOT use to categorize hazardous materials under 49 CFR?
- 7
- 9 (Correct answer)
- 11
- 6
Correct answer: 9
The DOT recognizes 9 hazard classes, ranging from Class 1 (Explosives) through Class 9 (Miscellaneous Dangerous Goods).
Question 3: What does a UN identification number displayed on a hazmat placard or orange panel identify?
- The carrier's assigned route number
- The specific hazardous material or group of materials (Correct answer)
- The shipper's account code with the carrier
- The emergency response team contact code
Correct answer: The specific hazardous material or group of materials
UN identification numbers (e.g., UN1203 for gasoline) identify the specific substance or group of hazardous materials, enabling responders to look up proper emergency procedures.
Question 4: Flammable liquids with a flash point at or below 60°C (140°F) are categorized under which DOT hazard class?
- Class 2
- Class 3 (Correct answer)
- Class 4
- Class 5
Correct answer: Class 3
Class 3 covers flammable liquids, defined as liquids with a flash point of not more than 60°C (140°F) or any material in a liquid phase with a flash point at or above 37.8°C (100°F).
Question 5: What is the minimum required dimension for each side of a DOT hazmat placard displayed on a transport vehicle?
- 6 inches (152 mm)
- 9.84 inches (250 mm) (Correct answer)
- 12 inches (305 mm)
- 15 inches (381 mm)
Correct answer: 9.84 inches (250 mm)
Per 49 CFR 172.519, placards must be at least 250 mm (9.84 inches) on each side to ensure visibility from a safe distance.
Question 6: What does the designation 'forbidden' mean when applied to a hazardous material under DOT regulations?
- The material requires a special DOT permit before transport
- The material may not be offered or accepted for transportation under any circumstances (Correct answer)
- The material must be transported by air freight only
- The material requires a HAZMAT endorsement on the driver's CDL
Correct answer: The material may not be offered or accepted for transportation under any circumstances
'Forbidden' materials, such as certain explosive compounds, are so dangerous that no mode of transportation is permitted for them under any regulatory provision.
Question 7: Which packing group indicates the highest level of danger for a hazardous material under DOT regulations?
- Packing Group III
- Packing Group II
- Packing Group I (Correct answer)
- Packing Group IV
Correct answer: Packing Group I
Packing Group I (PG I) represents materials posing the greatest danger and requires the most stringent packaging standards, while PG III is the least dangerous of the three groups.
CTS Hazardous Materials Transportation & Compliance 1
Which U.S. federal agency has primary authority over the safe transportation of hazardous materials by highway, rail, air, and water?