25 realistic Hazardous Materials practice questions for Michigan CDL applicants. Required for: Drivers transporting placarded hazardous materials. Official test: 30 questions, 24 correct to pass.
Question 1 of 25 · Shipping Papers
Which is true regarding HazMat shipping papers tabs?
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A.
They must be tabbed or be the first paper
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B.
They are filed alphabetically only
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C.
They are not required to be visible
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D.
They must be in a sealed envelope
Correct answer: A.
HazMat papers must be the top paper or tabbed to be readily identifiable.
Question 2 of 25 · Loading
Which of these can never be hauled with explosives?
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A.
Cyanides or other toxic substances
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B.
Building materials
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C.
Foodstuffs
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D.
Newspapers
Correct answer: A.
Cyanides, certain other poisons, and other incompatible substances cannot be loaded with explosives.
Question 3 of 25 · Rail Crossings
What is the maximum stopping distance allowed for HazMat vehicles approaching a railroad crossing?
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A.
Stop within 15-50 feet of the nearest rail and not closer than 15 feet
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B.
Stop on the tracks
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C.
Stop only when train is approaching
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D.
No stop required
Correct answer: A.
HazMat vehicles must stop 15 to 50 feet from the nearest rail before crossing.
Question 4 of 25 · CDL Rules
What does the letter "H" represent on a CDL?
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A.
Hazardous materials endorsement
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B.
Heavy vehicle endorsement
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C.
Highway driving endorsement
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D.
Hauling endorsement
Correct answer: A.
The H endorsement allows a CDL holder to transport placarded hazardous materials.
Question 5 of 25 · Placards
How are placards different from labels?
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A.
Labels go on packages; placards go on vehicles
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B.
Placards go on packages and labels go on vehicles
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C.
They are the same
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D.
Labels are only required outside the U.S.
Correct answer: A.
Labels mark individual packages; placards identify HazMat on vehicles.
Question 6 of 25 · Loading
What does the term "marking" refer to?
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A.
Marking the shipper's name on the package
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B.
Putting the proper shipping name and ID number on the package
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C.
Marking the truck's plates
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D.
Marking the route on a map
Correct answer: B.
Marking includes the proper shipping name and the four-digit ID number on the package.
Question 7 of 25 · Emergencies
Drivers must report HazMat incidents to:
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A.
The local newspaper
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B.
Carrier and law enforcement, then the National Response Center
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C.
No one — drivers are not responsible
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D.
The shipper only
Correct answer: B.
Notify your carrier and local responders, then call the National Response Center if reportable.
Question 8 of 25 · HazMat Driving
When transporting HazMat over long distances, drivers should:
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A.
Stay alert, take rest breaks, and inspect the load regularly
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B.
Drive at maximum speed limit
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C.
Skip rest stops to save time
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D.
Avoid highways
Correct answer: A.
Stay alert with regular rest breaks; inspect cargo at every stop.
Question 9 of 25 · HazMat Basics
Which is the goal of HazMat regulations?
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A.
To make HazMat transport safer for everyone
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B.
To allow easy transport of HazMat
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C.
To increase shipping costs
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D.
To require more inspections
Correct answer: A.
HazMat rules contain risk to public safety, property, and the environment.
Question 10 of 25 · Placards
Placards are warning signs placed on:
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A.
Drivers' shirts
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B.
The outside of vehicles transporting HazMat
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C.
The shipping papers only
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D.
Inside the cab
Correct answer: B.
Diamond-shaped placards on the four sides of the vehicle warn others of hazardous cargo.
Question 11 of 25 · Emergencies
When a HazMat package leaks, you should:
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A.
Move it to a safe area
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B.
Secure the area and call for help
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C.
Continue the trip
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D.
Place it in the trailer's rear
Correct answer: B.
Don't move leaking packages. Secure the area and contact qualified responders.
Question 12 of 25 · Parking
When is parking allowed for HazMat vehicles?
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A.
On highway shoulders for any reason
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B.
In safe locations away from open flames, heat sources, and people
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C.
Anywhere is fine
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D.
Only at truck stops
Correct answer: B.
Park away from people, fires, ignition sources, and within sight when possible.
Question 13 of 25 · Emergencies
When must drivers inform the carrier and emergency responders during a HazMat emergency?
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A.
As soon as it's safe to do so
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B.
When they reach the destination
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C.
Only after the cargo is unloaded
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D.
Only if asked
Correct answer: A.
Notify carrier and authorities immediately as soon as you can safely do so.
Question 14 of 25 · Loading
You should turn off your engine when:
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A.
Loading or unloading flammable liquids
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B.
Driving on a hill
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C.
Inspecting brakes
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D.
Refueling on the highway
Correct answer: A.
Turn off the engine when loading or unloading flammable liquids to reduce ignition risk.
Question 15 of 25 · Loading
When loading or unloading HazMat:
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A.
Set the parking brake
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B.
Be sure the cargo is properly braced
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C.
Stay close to the vehicle
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D.
All of the above
Correct answer: D.
Keep the brakes set, secure cargo, and remain on alert during loading and unloading.
Question 16 of 25 · Security
Which of these is part of the carrier's security plan?
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A.
Personnel security
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B.
Unauthorized access prevention
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C.
En-route security
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D.
All of the above
Correct answer: D.
Carrier security plans cover personnel checks, access controls, and en-route security.
Question 17 of 25 · HazMat Driving
What should a driver do before transporting any HazMat shipment?
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A.
Inspect the placards and shipping papers
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B.
Inspect the vehicle and cargo
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C.
Plan the route
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D.
All of the above
Correct answer: D.
Verify all paperwork, vehicle, cargo, and route before HazMat transport.
Question 18 of 25 · Loading
What is "compatibility group letter"?
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A.
A code that tells which explosives can be loaded together
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B.
A type of placard
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C.
A type of vehicle
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D.
A type of safety vest
Correct answer: A.
Letters such as "A," "B," etc., classify explosives that can be transported together.
Question 19 of 25 · Placards
When must placards be displayed?
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A.
Before the vehicle is loaded
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B.
Once the HazMat is loaded and secured before driving
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C.
After the trip ends
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D.
Only at weigh stations
Correct answer: B.
Drivers must placard once HazMat is loaded and verify before moving the vehicle.
Question 20 of 25 · Loading
What is "containment"?
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A.
Putting HazMat in proper packaging
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B.
A type of placard
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C.
Stopping leaks during transport
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D.
Containing fumes inside the trailer
Correct answer: A.
Containment means using packaging that meets DOT specifications for the material being shipped.
Question 21 of 25 · Emergencies
What is the first thing you should do if your HazMat load catches fire?
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A.
Pull over, away from buildings or vehicles, then call 911
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B.
Drive to the nearest hospital
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C.
Continue to destination
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D.
Try to put it out with snow
Correct answer: A.
Stop in a safe place, away from people and buildings, then notify emergency services.
Question 22 of 25 · Placards
What does "subsidiary hazard class" mean?
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A.
A secondary hazard a material poses
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B.
A backup placard
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C.
A small package
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D.
A vehicle accessory
Correct answer: A.
Some materials have a primary and a subsidiary hazard class for additional risks.
Question 23 of 25 · Placards
Which of these placards has a yellow background?
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A.
Flammable solids
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B.
Oxidizers
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C.
Corrosives
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D.
Radioactive
Correct answer: B.
Yellow background placards typically indicate oxidizers.
Question 24 of 25 · Placards
How many sides of a HazMat vehicle must be placarded?
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A.
One
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B.
Two
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C.
Three
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D.
Four
Correct answer: D.
Placards must be displayed on all four sides of the vehicle.
Question 25 of 25 · Shipping Papers
How can a driver determine the hazard class of a material?
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A.
Read the shipping paper or check the Hazardous Materials Table
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B.
Smell the package
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C.
Open the container
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D.
Ask other drivers
Correct answer: A.
The hazard class appears on shipping papers; the Hazardous Materials Table is the master reference.
About the Hazardous Materials Test
The Hazardous Materials (HazMat) test covers the rules for transporting materials that pose a risk to health, safety, and property. Topics include the hazardous materials table, shipping papers, marking, labeling, placarding, loading and unloading, bulk packaging, driving and parking rules, communications, emergencies, and hazardous materials regulations enforced by the U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration. A federal Transportation Security Administration (TSA) background check is also required.
The Michigan Secretary of State — Driver Services administers this knowledge test as part of its commercial driver license program. To earn the HazMat Endorsement (H) on your Michigan CDL, you need to score at least 24 out of 30 on the official version.
Topics covered on this practice test
- Loading: 6 questions
- Placards: 6 questions
- Emergencies: 4 questions
- Shipping Papers: 2 questions
- HazMat Driving: 2 questions
- Rail Crossings: 1 question
- CDL Rules: 1 question
- HazMat Basics: 1 question
- Parking: 1 question
- Security: 1 question
How to use this practice test
- Read each question carefully. CDL questions are written precisely — small wording differences matter.
- Click "Show Answers & Explanations" only after answering every question. Don't peek mid-test.
- Read the explanation for every question, even ones you got right. The reasoning is more important than the answer.
- Repeat the test until you score 100%. The questions are deterministic per state, so you can track your improvement over multiple sessions.
- Move on to the other endorsement tests for Michigan until you're ready for the official exam.
Tips specific to the Hazardous Materials test
HazMat is the longest knowledge test (30 questions) and adds a Transportation Security Administration (TSA) background check. Most candidates struggle with placard colors, the segregation table, shipping paper requirements, and emergency response procedures. Use the official Emergency Response Guidebook (ERG) alongside this practice set.