HazMat Ultimate CDL Hazardous Materials (HazMat) Endorsement 5 — Questions and Answers
Question 1: When transporting Division 2.3 (Poison Gas) materials, what additional requirement applies to the vehicle?
- The vehicle must have a fire suppression system
- The vehicle must display POISON GAS placards even in small quantities (Correct answer)
- The vehicle must be escorted by a police vehicle
- The vehicle must travel only at night
Correct answer: The vehicle must display POISON GAS placards even in small quantities
Division 2.3 Poison Gas materials require placards regardless of quantity because of their extreme toxicity risk.
Question 2: What is the purpose of the four-digit ID number displayed on hazmat placards or orange panels?
- To identify the carrier's license number
- To identify the specific hazardous material for emergency responders (Correct answer)
- To indicate the weight of the hazmat shipment
- To show the DOT inspection sticker number
Correct answer: To identify the specific hazardous material for emergency responders
The four-digit UN/NA identification number allows emergency responders to quickly identify the specific material and look up response information in the ERG.
Question 3: How must a driver handle a hazmat shipping paper when they leave the truck unattended?
- Lock it in the cab
- Leave it on the driver's seat or in a door pouch, visible from outside (Correct answer)
- Take it with them
- Place it in the engine compartment
Correct answer: Leave it on the driver's seat or in a door pouch, visible from outside
When the driver is out of the cab, shipping papers must be in a pouch on the driver's door or on the driver's seat so emergency responders can find them quickly.
Question 4: What is the maximum time a placarded hazmat vehicle may be parked on or within 5 feet of a public road?
- No time limit as long as it has emergency triangles
- Only as long as necessary for loading/unloading (Correct answer)
- Up to 4 hours with flashers on
- Up to 8 hours if attended
Correct answer: Only as long as necessary for loading/unloading
Placarded hazmat vehicles may only be parked on or near a public road for the time necessary for operations — they should not be left unattended on or near roadways.
Question 5: You see a cargo tank marked with an 'MC 306' designation. What type of product is this tank most commonly used to transport?
- Compressed gases
- Gasoline and petroleum products (Correct answer)
- Corrosive acids
- Radioactive waste
Correct answer: Gasoline and petroleum products
MC 306 (DOT 406) cargo tanks are elliptical-shaped aluminum tanks commonly used to transport petroleum products like gasoline and diesel.
Question 6: Which of the following materials would be classified as a 'Poison by Inhalation' (PIH) hazard?
- Diesel fuel
- Chlorine gas (Correct answer)
- Wet cement
- Motor oil
Correct answer: Chlorine gas
Chlorine gas is a classic Poison Inhalation Hazard (PIH) material because inhaling it can cause serious injury or death even in small quantities.
Question 7: If you are involved in a hazmat accident, which number should you call to report to the National Response Center?
- 1-800-424-8802 (Correct answer)
- 1-888-DOT-SAFE
- 911 only
- 1-800-HazMat-1
Correct answer: 1-800-424-8802
Incidents involving hazardous materials must be reported to the National Response Center at 1-800-424-8802.
HazMat Ultimate CDL Hazardous Materials (HazMat) Endorsement 5
When transporting Division 2.3 (Poison Gas) materials, what additional requirement applies to the vehicle?