Missouri CDL Hazmat flashcards
Missouri CDL Hazmat · Build recall with a focused review session.
33 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Hazard class 3
- Flammable and combustible liquids, such as gasoline and diesel fuel. Placards for this class are red and show a flame symbol.
- UN identification number
- A four-digit number assigned to a specific hazardous material, shown on shipping papers, orange panels, and some placards. It lets responders identify the exact product.
- Placard threshold
- Placards are required when 1,001 pounds or more aggregate gross weight of a hazard class is loaded, or for any quantity of certain high-hazard materials.
- Shipping paper order
- The basic description lists the proper shipping name, hazard class, and packing group, in that order, followed by the UN number and total quantity.
- Emergency response information
- Written information that must accompany every hazmat shipment, giving the hazards, protective actions, and a monitored emergency phone number for responders.
- DANGEROUS placard
- A placard used when a vehicle carries two or more hazard classes that each require placarding, and the aggregate weight is 1,001 pounds or more.
- EMPTY placard
- A placard used on a tank that has been emptied of a hazardous material but not purged, warning that residual material may still be present.
- INHALATION HAZARD placard
- Required for toxic materials that are hazardous by inhalation, such as Packing Group I hazard zone A or B materials. Responders must use extreme caution.
- Cargo tank outage
- The empty space left in a tank so liquid can expand with temperature changes. Overfilling a tank can cause it to rupture or overflow.
- Segregation rule
- Certain hazard classes must not be loaded together because mixing or leaking can cause fire, explosion, or toxic gas. Cyanides and acids are a classic example.
- Railroad crossing stop
- A vehicle carrying Division 1.1, 1.2, or 1.3 explosives must stop at all railroad crossings and check for an approaching train before crossing.
- BLEVE
- Boiling liquid expanding vapor explosion. A tank of liquefied gas heated by fire can rupture violently, so evacuate a wide area and stay upwind.
- ERG guide number
- A number in the Emergency Response Guidebook that gives initial isolation distances, evacuation guidance, and firefighting precautions for a material.
- National Response Center
- The federal point of contact for reporting hazardous materials releases, reached at 1-800-424-8802. Carriers and drivers report qualifying incidents there.
- Attendance rule
- A vehicle carrying hazardous materials must be attended by a qualified person at all times, except when parked at a secure facility under limited regulatory exceptions.
- Smoking distance
- No smoking or lit smoking device is allowed within 25 feet of a vehicle carrying explosives, oxidizers, or flammable materials.
- Parking distance
- A hazmat vehicle must not be parked within 5 feet of the traveled portion of a public roadway, and never within 300 feet of an open fire.
- Hazmat endorsement test
- A knowledge test added to a Class A, B, or C CDL covering regulations, loading, placarding, and emergency response. It requires a TSA security threat assessment.
- TSA threat assessment
- A security check required for a hazmat endorsement. Certain criminal convictions or controlled-substance felonies can disqualify an applicant.
- Fire extinguisher minimum
- A vehicle carrying hazardous materials must carry at least a 10 BC-rated fire extinguisher, and the driver must know how to use it.
- Label versus placard
- Labels are four-inch square hazard warnings placed on packages. Placards are 10 3/4-inch square warnings placed on the vehicle.
- Corrosive handling
- Division 8 corrosives burn skin and corrode metal. A leak can weaken a tank or container, so report damage and avoid contact.
- Water-reactive materials
- Division 4.3 materials react with water to release heat or flammable gas. Never use water on a spill or fire involving them.
- Organic peroxide risk
- Division 5.2 materials can decompose violently if temperature control fails. Monitor temperature and act immediately if control is lost.
- Radioactive load rule
- Division 7 materials must be kept away from people and never loaded with food or animal feed. Do not smoke near radioactive packages.
- Damaged package rule
- A driver must refuse to load or transport a package that is leaking, damaged, or improperly marked, and must report it to the shipper and carrier.
- Security awareness
- Training that helps drivers recognize and report suspicious behavior, unauthorized access, and unusual questions about the cargo, without confronting anyone.
- Out-of-service order
- An enforcement action that stops a vehicle from moving until a hazmat defect, such as a missing placard or bad paperwork, is corrected.
- Placard placement
- Placards go on both sides and both ends of the vehicle, are placed on point, and must be readable from the direction they face.
- Orange panel
- A panel showing the four-digit UN number, required on tank vehicles and bulk packages so responders can identify the material quickly.
- Incident reporting
- A hazmat release must be reported to the carrier and, when required, to the National Response Center. The driver must follow the carrier's emergency plan.
- Cell phone rule
- A CMV driver, including a hazmat driver, must not use a hand-held mobile phone or send text messages while driving.
- Proper shipping name
- The official name of a hazardous material as listed in the regulations. It must appear on the shipping paper and on package markings.