Mississippi CDL HazMat Endorsement Test flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

HazMat endorsement requirement

A CDL with an H endorsement is required to operate a vehicle carrying a placarded quantity of hazardous materials; an N endorsement is required for tank vehicles.

Hazardous material definition

A substance or material that the Secretary of Transportation determines is capable of posing an unreasonable risk to health, safety, and property when transported in commerce.

49 CFR Parts 171-180

The Hazardous Materials Regulations: Part 171 general, 172 communications, 173 shippers, 177 highway, 178 packagings, 180 continuing packaging qualification.

Shipper vs carrier duties

Shippers classify, package, mark, label, and prepare shipping papers; carriers are responsible for vehicle condition, loading, placarding, and en route operation.

HazMat employee training

HazMat employees must receive general awareness, function-specific, safety, and security awareness training, with recurrent training at least every three years.

Basic shipping description

The shipping paper must show the proper shipping name, hazard class or division, UN/NA identification number, and packing group when assigned, plus quantity and package count.

Emergency response telephone

The shipping paper must list an emergency response telephone number that is monitored at all times during transport and answered by a person with knowledge of the material.

Placard thresholds

Table 1 materials require placards in any quantity; Table 2 materials require placards when the aggregate gross weight is 1,001 pounds or more.

DANGEROUS placard use

The DANGEROUS placard may be used for Table 2 materials when two or more categories are present and the aggregate weight is 1,001 pounds or more.

Empty packaging residue

For empty packagings that previously contained hazardous materials, the shipping paper may state 'Residue: last contained' followed by the proper shipping name and hazard class.

Cargo segregation rule

Cyanides and acids must not be loaded together; oxidizers must be separated from flammables; consult the segregation table in 49 CFR 177.848.

Cargo tank outage

A cargo tank may not be filled beyond its marked capacity; vapor space (outage) must be maintained to allow for expansion of the liquid.

Loading and unloading safety

When loading or unloading a placarded vehicle, shut off the engine, set the brakes, chock the wheels, and prohibit smoking or open flames within 25 feet.

Cargo securement working load

Cargo must be secured with tiedowns whose aggregate working load limit is at least 50 percent of the cargo weight for highway transport.

Railroad crossing stop

A placarded vehicle must stop within 50 feet but not less than 15 feet from the nearest rail, look both ways, and proceed only when safe.

Fueling a placarded vehicle

The engine must be shut off before fueling a placarded vehicle, and smoking is prohibited within 25 feet of the vehicle during fueling.

Unattended placarded vehicle

A placarded vehicle may not be left unattended unless it is secured against movement and the parking area is safe; the driver may need to remain within 100 feet.

Tunnel restrictions

Placarded vehicles carrying certain hazardous materials may be prohibited from entering tunnels; drivers must obey posted signs and designated hazmat routes.

National Response Center

Hazardous materials incidents involving a fatality, hospitalization, evacuation, or specified damage must be reported immediately to the National Response Center at 1-800-424-8802.

DOT Form 5800.1

The carrier must submit a written hazardous materials incident report on DOT Form 5800.1 within 30 days of the incident.

Security awareness

Drivers must recognize suspicious behavior, secure the vehicle and cargo, and report suspicious activity to the carrier and appropriate authorities.

Class 2 divisions

Class 2 gases are divided into 2.1 flammable gas, 2.2 nonflammable non-toxic gas, and 2.3 toxic gas; Division 2.3 materials are toxic-by-inhalation.

Class 3 flammable liquid

A flammable liquid has a flash point not more than 60 degrees C (140 degrees F); packing groups I, II, and III reflect flash point and boiling point.

Class 4 divisions

Class 4 flammable solids are divided into 4.1 flammable solid, 4.2 spontaneously combustible, and 4.3 dangerous when wet.

Class 8 corrosives

Class 8 corrosives cause full-thickness destruction of skin or corrode steel or aluminum; packing groups reflect the degree of hazard.

Class 9 miscellaneous

Class 9 covers materials that present a hazard during transport but do not fit another class, such as lithium batteries and dry ice.

Cargo tank specification

A cargo tank is a bulk packaging attached to a motor vehicle; its specification plate identifies the authorized materials, capacity, and construction.

TIH materials

Division 2.3 and Division 6.1 toxic-by-inhalation materials require special handling, routing, and attendance; some require a written route plan.

Bulk package marking

Bulk packages must display the UN/NA identification number on each side and each end, and the number must also be displayed on the vehicle.

Bridge weight limits

Bridges may impose weight limits or hazardous materials restrictions; drivers must obey posted limits and may not exceed the bridge's rated capacity.

Stall on crossing

If a vehicle stalls on a railroad crossing, the driver must evacuate, warn others, move away from the vehicle, and call for help.

TSA security threat assessment

An H endorsement applicant must complete a TSA security threat assessment including fingerprint-based criminal history checks and terrorism database checks before endorsement.