Missouri HazMat Test (MO) 2026

4.8 out of 5 (187 votes)
80% Passing score
20 Questions
4 Mistakes allowed
If you're aiming to add the HazMat endorsement to your commercial driver's license in Missouri, our Missouri HazMat practice test is an invaluable resource. This Missouri drivers license practice test offers a thorough review of all the essential topics you'll need to master. From identification and handling to transportation and emergency procedures, every aspect of HazMat safety is covered comprehensively. The practice permit test also delves into placarding and TSA security requirements, ensuring that you're well-prepared for any scenario you might encounter on the road. One of the key features of our Missouri permit practice test is its similarity to the real permit test. The questions you'll find here closely mimic those on the actual test, both in format and content. This similarity helps you get accustomed to the types of questions you'll face, making the actual test day less daunting. Additionally, you can take the DMV practice test as many times as you need. This repeated exposure not only builds confidence but also solidifies your understanding of the material, ensuring you're ready for the next step in your CDL journey. The Missouri permit test practice includes a mix of real-life driving scenarios. These scenarios are designed to help you apply what you've learned in practical situations, enhancing your overall safety and preparedness. It's not just about passing the written test; it's about becoming a safer, more informed driver. Each Missouri DMV HazMat test comprises 20 multiple-choice questions, with a passing requirement of 16 correct answers. This rigorous testing ensures that you have a solid grasp of the material before you hit the road. You'll also learn the importance of having immediate access to emergency response information while driving, a crucial element in handling accidents and emergencies effectively. Prepare thoroughly with our Missouri CDL HazMat test, and you'll be well on your way to securing your HazMat endorsement. Whether it's your first attempt or you're retaking it to improve your score, our MO HazMat practice test is here to guide you every step of the way.
FREE CDL Practice Test App
Pass your Missouri CDL Hazardous Materials test with the NextDoorDriving app. Real questions and answers—100% free and ad-free.
Download on the App Store

Sample Missouri HazMat Test Questions

Question 1

Which highway shipment may qualify for an exception from the shipper's certification requirement?

  1. A A shipment that is missing a required RQ marking
  2. B A shipment carried in a correctly placarded vehicle
  3. C A shipment containing improperly packaged hazardous material
  4. D A non-waste hazardous material transported by the shipper as a private carrier without reshipment or transfer

Correct answer: D – A non-waste hazardous material transported by the shipper as a private carrier without reshipment or transfer

Federal hazardous materials regulations generally require the offeror's certification on the shipping paper. Except for hazardous waste, certification is not required when the shipper transports the material by motor vehicle as a private carrier, unless it will be reshipped or transferred between carriers. A separate exception covers certain shipments in a cargo tank supplied by the carrier. Placarding does not replace certification when certification is otherwise required.

Source: 49 CFR § 172.204(a), (b)(1) – Shipper’s certification

Question 2

While hazardous materials are being loaded or unloaded, which group is covered by the no-smoking rule?

  1. A Class 1, Class 2, Class 4, and Class 7
  2. B Division 2.1, Class 3, Class 4, and Class 7
  3. C Class 1, Division 2.1, Class 3, Class 4, and Class 5
  4. D Class 2, Class 3, Class 4, and Class 5

Correct answer: C – Class 1, Division 2.1, Class 3, Class 4, and Class 5

Federal regulations prohibit smoking on or about a motor vehicle while loading or unloading Class 1 explosives, Division 2.1 flammable gases, Class 3 flammable liquids, Class 4 flammable solids, or Class 5 oxidizing materials. Fire must be kept away, and nearby persons must also be prevented from smoking or carrying an open flame. Division 2.1 is specified rather than all of Class 2.

Source: Missouri Commercial Driver License Manual — § 9.4.1, “General Loading Requirements”, 49 CFR § 177.834(c)–(d) – General requirements

Question 3

Which sequence correctly shows the basic description of a hazardous material on a shipping paper?

  1. A Proper shipping name, hazard class, identification number, packing group
  2. B Hazard class, identification number, proper shipping name, packing group
  3. C Identification number, proper shipping name, hazard class, packing group
  4. D Packing group, proper shipping name, identification number, hazard class

Correct answer: C – Identification number, proper shipping name, hazard class, packing group

Federal hazardous-materials regulations require the identification number first, followed by the proper shipping name and hazard class or division. The packing group follows when one is assigned. A packing group is written in Roman numerals and may be preceded by “PG.”

Source: 49 CFR § 172.202(a)–(b) — Description of hazardous material on shipping papers

Question 4

What is the main purpose of hazardous-material placards on a vehicle?

  1. A To communicate the cargo’s hazards
  2. B To keep the material inside its container
  3. C To show the exact quantity being transported
  4. D To replace the shipping paper

Correct answer: A – To communicate the cargo’s hazards

Placards are hazard-communication devices, not containment equipment or quantity records. They help drivers, emergency personnel, and others recognize the general hazard presented by the cargo. Missouri’s CDL manual groups placards with shipping papers, package markings, labels, and emergency-response information used to communicate risk.

Source: Missouri Commercial Driver License Manual — § 9.1.2, “Communicate the Risk”

Question 5

Unless you have verified all special cargo-heater requirements, which materials should not be loaded in a cargo space equipped with a heater or heater-air conditioner unit?

  1. A Class 1, Division 2.1, and Class 5
  2. B Class 1, Division 2.2, and Class 3
  3. C Division 2.1, Class 4, and Class 5
  4. D Class 1, Division 2.1, and Class 3

Correct answer: D – Class 1, Division 2.1, and Class 3

Special cargo-heater requirements apply to Class 1 explosives, Division 2.1 flammable gases, and Class 3 flammable liquids. Federal rules require a heater to be disabled for Class 1 cargo and impose specific conditions on combustion heaters used with Division 2.1 or Class 3 materials. Missouri guidance tells drivers not to load these materials in heated cargo space unless they understand the applicable requirements.

Source: Missouri Commercial Driver License Manual — § 9.4, “Cargo Heater Rules”, 49 CFR § 177.834(l) — General requirements

Question 6

What does a “+” in Column 1 of the Hazardous Materials Table indicate?

  1. A The listed proper shipping name, hazard class, and packing group must be used even if the material does not meet that hazard-class definition
  2. B The shipping name is used only for international transportation
  3. C The shipping name may be used only for domestic transportation
  4. D The entry is a generic shipping name requiring a technical name

Correct answer: A – The listed proper shipping name, hazard class, and packing group must be used even if the material does not meet that hazard-class definition

The plus sign fixes the proper shipping name, hazard class, and packing group shown in the table for that material. Those entries must be used even when the material does not meet the stated hazard-class definition. Other Column 1 symbols have different meanings, including “G” for a generic shipping name.

Source: Missouri Commercial Driver License Manual — § 9.2.3, “The Hazardous Materials Table”, 49 CFR § 172.101(b)(1) — Purpose and use of hazardous materials table

More Missouri CDL Practice Tests
Other CDL Endorsements