CLP Hazardous Materials Transportation 2 — Questions and Answers
Question 1: When is a driver NOT required to have a hazardous materials endorsement (HME) on their CDL?
- When transporting any quantity of Class 8 corrosives
- When transporting small quantities of hazmat that do not require placards (Correct answer)
- When driving a vehicle weighing over 26,001 lbs with hazmat cargo
- When transporting hazmat in a combination vehicle
Correct answer: When transporting small quantities of hazmat that do not require placards
The HME is required when transporting quantities of hazmat that require placards; small, non-placardable quantities may not require the endorsement.
Question 2: Which of the following is classified as a Division 1.1 explosive?
- Blasting agents
- Mass explosion hazard explosives (dynamite) (Correct answer)
- Detonating cord
- Black powder propellants
Correct answer: Mass explosion hazard explosives (dynamite)
Division 1.1 covers materials with a mass explosion hazard, such as dynamite, meaning a single item exploding could cause the entire load to detonate simultaneously.
Question 3: What does the four-digit identification number on a hazmat placard or orange panel represent?
- The weight of the cargo in pounds
- The UN/NA identification number that identifies the specific hazardous material (Correct answer)
- The driver's permit number for hazmat transport
- The DOT-assigned route number for hazmat vehicles
Correct answer: The UN/NA identification number that identifies the specific hazardous material
The four-digit UN/NA number (e.g., UN 1203 for gasoline) uniquely identifies the hazardous substance and allows emergency responders to look it up in the ERG.
Question 4: A driver transporting hazardous materials should NOT park within how many feet of a bridge, tunnel, or building in a populated area unless necessary for operations?
- 100 feet
- 200 feet
- 300 feet (Correct answer)
- 500 feet
Correct answer: 300 feet
Federal regulations require hazmat vehicles to remain at least 300 feet from bridges, tunnels, or buildings in populated areas when parked, to limit risk in case of an incident.
Question 5: Which of the following materials requires the driver to stop before crossing railroad tracks regardless of other traffic conditions?
- Any cargo weighing over 10,000 lbs
- Any vehicle transporting placardable quantities of hazardous materials (Correct answer)
- Any vehicle with a GVWR over 26,001 lbs
- Any refrigerated trailer unit
Correct answer: Any vehicle transporting placardable quantities of hazardous materials
Vehicles carrying placardable amounts of hazardous materials must always stop 15–50 feet before railroad crossings, look and listen, and proceed only when safe.
Question 6: What action should a driver take if they discover a hazardous materials leak in their load during a trip?
- Continue to the destination and report on arrival
- Pull safely off the road, keep people away, call for help, and do not touch or move the material (Correct answer)
- Cover the leaking container with a tarp and proceed
- Transfer the leaking material to another container immediately
Correct answer: Pull safely off the road, keep people away, call for help, and do not touch or move the material
In a hazmat leak, the driver must stop safely, isolate the area, notify authorities, and avoid contact with the material until qualified responders arrive.
Question 7: Which hazard class covers compressed gases such as propane and oxygen?
- Class 1
- Class 2 (Correct answer)
- Class 4
- Class 6
Correct answer: Class 2
Class 2 is for gases, which includes compressed gases (Division 2.1 flammable gases, Division 2.2 non-flammable compressed gases, and Division 2.3 poisonous gases).
CLP Hazardous Materials Transportation 2
When is a driver NOT required to have a hazardous materials endorsement (HME) on their CDL?