Question 1 of 20
Hazardous materials are products that:
Correct. Hazardous materials (hazmat) are products that pose a risk to health, safety, or property during transportation. Hazmat regulations are codified in 49 CFR.
Wyoming Hazmat CDL Practice Test
This is a free 20-question practice test for the Hazmat portion of the Wyoming Commercial Driver's License knowledge exam. Questions are pulled from a pool of 68 drawn from the AAMVA CDL Manual, which is the source document the Wyoming Department of Transportation Driver Services uses to write its actual exam.
How it works: Click an answer. The correct choice highlights in green, and you'll see a short explanation. Aim for 85% or better before you sit for the real test in Wyoming.
Question 2 of 20
The shipping paper for hazmat must include:
Correct. A complete shipping paper includes proper shipping name, hazard class or division, UN/NA ID number, packing group (where applicable), total quantity and unit, and a 24-hour emergency contact.
Question 3 of 20
When you stop at a railroad crossing in a placarded hazmat vehicle, you must stop:
Correct. Placarded hazmat vehicles must stop at every railroad crossing 15 to 50 feet from the nearest rail. Look and listen for trains.
Question 4 of 20
Class 1.1, 1.2, or 1.3 explosives must be parked:
Correct. Division 1.1, 1.2, and 1.3 explosives, and Division 2.3 or 6.1 PIH cargo, must have an attended-vehicle (qualified person within 100 feet, awake, able to see the vehicle).
Question 5 of 20
Hazard Class 1 is:
Correct. Class 1 covers explosives, divided into divisions 1.1 through 1.6 by mass-explosion and projection hazard.
Question 6 of 20
You discover a leak in a Class 3 (flammable liquid) shipment. You should:
Correct. Stop in a safe location, secure the area, call 911, and notify your dispatcher. Do not transfer cargo by the side of the road.
Question 7 of 20
Inhalation hazard placards (Division 6.1 PIH or Division 2.3) require:
Correct. PIH (Poison Inhalation Hazard) materials require a primary hazard-class placard plus an "INHALATION HAZARD" subsidiary placard.
Question 8 of 20
When you transport Division 1.1 or 1.2 explosives, you must have a written route plan:
Correct. A written route plan is required for transporting Division 1.1 or 1.2 explosives. The driver must follow it unless there is an emergency.
Question 9 of 20
A hazmat driver must complete which special training?
Correct. PHMSA requires general awareness, function-specific, safety, security awareness, and in-depth security training (when a security plan applies). Carriers document and re-train every three years.
Question 10 of 20
When loading a vehicle with hazardous materials, you should:
Correct. Set the parking brake, chock wheels of cargo tank vehicles, and shut off the engine before loading or unloading flammables.
Question 11 of 20
When transporting hazmat, you must check the cargo every:
Correct. Federal cargo securement: check at the start, then every 150 miles or 3 hours of driving, plus every change of duty status.
Question 12 of 20
Who is responsible for proper hazmat packaging and labeling?
Correct. The shipper packages, labels, and certifies the materials. The carrier and driver verify and refuse non-compliant shipments.
Question 13 of 20
A driver's responsibilities for hazmat include:
Correct. The driver verifies the shipment, placards if required, carries the documentation, follows routes and parking rules, and handles incidents per training.
Question 14 of 20
A driver may not carry hazmat aboard a vehicle without:
Correct. Hauling placardable hazmat requires the H endorsement, which includes a TSA Threat Assessment background check.
Question 15 of 20
The 24-hour emergency response phone number on the shipping paper:
Correct. The 24-hour emergency contact must be a person knowledgeable about the materials, available 24/7. Many shippers contract CHEMTREC or similar.
Question 16 of 20
How many hazard classes are there?
Correct. There are nine hazard classes: 1 explosives, 2 gases, 3 flammable liquids, 4 flammable solids, 5 oxidizers and organic peroxides, 6 toxic and infectious, 7 radioactive, 8 corrosive, 9 miscellaneous.
Question 17 of 20
The shipper must certify on the shipping paper that:
Correct. The shipper signs a certification that the shipment is properly described, packaged, marked, labeled, and complies with HMR.
Question 18 of 20
A hazmat carrier with hazmat cargo must conduct security awareness training:
Correct. PHMSA requires re-training every three years, including security awareness and the carrier's in-depth security plan if applicable.
Question 19 of 20
The Hazardous Materials Table (HMT) lists:
Correct. The HMT in 49 CFR §172.101 lists every hazardous material with its proper shipping name, hazard class, identification number, packing group, label requirements, and special provisions.
Question 20 of 20
Bulk packaging of certain corrosives requires:
Correct. Bulk packaging of corrosives, like other hazmat, requires shipping name on the sides and ID-number marking on each side and end.
About the Wyoming Hazmat exam
Most states administer 30 Hazmat questions and require 80% to pass. The exam covers hazard classes, the shipping paper, placards and labels, loading and unloading, driving and parking rules, emergency response, and the Emergency Response Guidebook (ERG).
The Wyoming Department of Transportation Driver Services follows the federal CDL standards established by FMCSA. To earn the Hazmat credential, you must answer at least 80% of the questions correctly. Many candidates score lower the first time because the test pulls from a large pool — refreshing this page will give you a different mix of questions, drawn from the same authoritative source.
Want more practice? Try the full Hazmat question bank or browse all Wyoming CDL practice tests.