Hazardous Materials Hazmat Practice Test Flashcards
6 cards from real CDL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Hazardous Materials Hazmat Practice Test flashcards as text
Which document must be immediately accessible to emergency responders in the event of a hazardous materials incident?
Answer: Shipping papers describing the hazmat on board
Shipping papers (bill of lading, manifest, or shipping order) must list all hazardous materials and be placed where emergency responders can find them — in the cab on the driver's seat when the driver is out of the vehicle, or within reach when driving.
What does the hazardous materials placard number system tell emergency responders?
Answer: The four-digit UN/NA identification number that identifies the specific hazardous material
The four-digit UN (United Nations) or NA (North American) ID number displayed on placards or orange panels identifies the specific substance. Emergency responders use this number to look up response procedures in the ERG.
When must hazardous materials shipping papers be tagged with the word 'DANGEROUS'?
Answer: When two or more hazardous materials from different hazard classes are listed, the shipper may use DANGEROUS instead of listing each material separately, if the total quantity does not exceed 1,001 lb and certain other conditions are met
Shippers may use DANGEROUS as a consolidated description when multiple hazardous materials from different hazard classes are present and the total does not exceed 1,001 lb, subject to additional regulatory conditions. It is not required for all hazmat shipments.
Which class of hazardous materials requires special routing to AVOID tunnels whenever possible?
Answer: Class 1 Explosives and certain Class 2 gases, Class 3 flammables, and other classes as required by the Hazardous Materials Regulations
Explosives (Class 1) are generally prohibited in tunnels, and flammables, poisons, and certain gases also have tunnel routing restrictions because a fire or explosion underground is catastrophic. Restrictions are not limited to corrosives or radioactive materials.
How far must a driver park from a tunnel, bridge, or building while transporting certain hazardous materials and waiting for traffic to clear?
Answer: 300 feet from the nearest rail of a railroad crossing, bridge, or tunnel entrance
When carrying hazardous materials, a driver must not park within 300 feet of a bridge, tunnel, or building while awaiting traffic clearance. This distance limits damage in the event of a hazmat incident.
What is the primary purpose of the Emergency Response Guidebook (ERG)?
Answer: To help emergency responders quickly identify hazardous materials and take initial safety actions during the first 30 minutes of an incident
The ERG provides emergency responders with immediate guidance on isolation distances, protective actions, fire response, and first aid for the first critical phase of a hazmat incident. It is not a driver checklist, route guide, or certification record.