CDL Hazardous Materials (Hazmat) Practice Test

Question 1

According to DOT regulations, which document must always accompany a hazardous materials shipment?

Accepted Answer

Shipping papers (manifest) describing the hazardous materials

Answer

A shipping paper (manifest) describing the hazardous materials must accompany every HazMat shipment. It must include the proper shipping name, hazard class, UN/NA identification number, packing group, and quantity. The driver must keep it within reach while driving and know where it is at all times.

Question 2

What is the purpose of placards on a vehicle transporting hazardous materials?

Accepted Answer

To warn others of the type of hazardous material being transported

Answer

Placards are diamond-shaped signs placed on all four sides of a vehicle to warn others of the hazardous materials being carried. They indicate the hazard class (e.g., flammable, explosive, poison) using standardized colors, symbols, and numbers, allowing emergency responders to identify the hazard quickly.

Question 3

A leaking package of hazardous materials is discovered in your cargo. What should you do?

Accepted Answer

Stop safely, keep others away, and contact emergency services without touching the package

Answer

You should not touch the leaking package. Stop at a safe location away from people, water, and ignition sources. Keep others away from the area. Contact emergency services and your dispatcher. Refer to the Emergency Response Guidebook (ERG) for the specific material. Never continue driving with a known leak.

Question 4

What does UN 1203 identify?

Accepted Answer

Gasoline

Answer

UN 1203 is the United Nations identification number for gasoline (motor fuel/petrol). UN numbers are four-digit codes assigned to specific hazardous materials or classes of hazardous materials to facilitate international transport. This number appears on placards and shipping papers.

Question 5

When is a HazMat endorsement required on a CDL?

Accepted Answer

When transporting materials in quantities requiring placarding or any select agent/toxin

Answer

A HazMat endorsement (H endorsement) is required whenever a driver transports hazardous materials in quantities that require placarding, OR any amount of a material listed as a select agent or toxin. Obtaining this endorsement requires passing a knowledge test and a TSA security threat assessment background check.

CDL Practice Test

CDL Practice Test

CDL Hazardous Materials (Hazmat) Practice Test