25 realistic Hazardous Materials practice questions for Arkansas CDL applicants. Required for: Drivers transporting placarded hazardous materials. Official test: 30 questions, 24 correct to pass.
Question 1 of 25 · HazMat Driving
When transporting Class 1 explosives, the driver must:
-
A.
Park anywhere convenient
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B.
Have a written route plan and follow it
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C.
Drive only at night
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D.
Drive only on local roads
Correct answer: B.
Drivers must have a route plan and avoid populated areas where possible.
Question 2 of 25 · CDL Rules
Drivers transporting HazMat must have:
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A.
Only a regular driver license
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B.
A valid CDL with HazMat endorsement and TSA security threat assessment
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C.
A passport
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D.
Physician's certification only
Correct answer: B.
A current CDL with HazMat endorsement (and TSA background check) is required.
Question 3 of 25 · HazMat Driving
Drivers transporting Division 1.1, 1.2, or 1.3 explosives may NOT:
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A.
Take a route that goes through tunnels prohibiting explosives
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B.
Refuel at any station
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C.
Travel during business hours
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D.
Cross any state line
Correct answer: A.
Avoid tunnels and routes prohibiting explosives. Use only approved routes.
Question 4 of 25 · Security
Which is true about HazMat security?
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A.
Drivers should keep doors locked when stopped
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B.
Drivers should never leave the vehicle unattended
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C.
Drivers must follow the carrier's security plan
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D.
All of the above
Correct answer: D.
All these practices reduce theft and tampering risk for HazMat.
Question 5 of 25 · Emergencies
What does "ERG" stand for?
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A.
Emergency Response Guide
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B.
Energy Regulations Guide
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C.
Environmental Resource Guide
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D.
Emissions Reduction Guide
Correct answer: A.
The DOT Emergency Response Guidebook contains response info for HazMat incidents.
Question 6 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 7 of 25 · Emergency Equipment
Which of the following is a sign of a tire fire?
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A.
Smoke from the tire
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B.
A loud noise
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C.
Vibration in the steering
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D.
All of the above
Correct answer: D.
Watch for smoke, noise, and vibration as warning signs of a tire fire.
Question 8 of 25 · HazMat Basics
What's the most important reason for these regulations?
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A.
Public safety
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B.
Protect the environment
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C.
Protect the carrier
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D.
All of the above
Correct answer: D.
Regulations protect people, property, and the environment.
Question 9 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.
Question 10 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 11 of 25 · Placards
Green placards usually indicate:
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A.
Compressed gases (non-flammable)
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B.
Explosives
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C.
Poisons
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D.
Corrosives
Correct answer: A.
Green placards usually indicate non-flammable compressed gases.
Question 12 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 13 of 25 · Placards
What does the placard table tell you?
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A.
Which placards are required for which materials and quantities
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B.
Vehicle dimensions
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C.
Highway routes
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D.
Loading dock procedures
Correct answer: A.
The placarding table sets the placard rules based on hazard class and amount.
Question 14 of 25 · Placards
Yellow placards generally indicate:
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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 materials
Correct answer: B.
Yellow placards usually indicate oxidizers.
Question 15 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 16 of 25 · Parking
Some HazMat vehicles cannot be parked within how many feet of a bridge, tunnel, or building?
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A.
100 feet
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B.
200 feet
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C.
300 feet
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D.
500 feet
Correct answer: C.
Class 1 (explosives) generally must not be parked within 300 feet of bridges, tunnels, or buildings.
Question 17 of 25 · HazMat Driving
When can drivers smoke around a HazMat vehicle?
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A.
While driving only
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B.
When parked at a truck stop
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C.
Never within 25 feet of certain materials
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D.
Whenever convenient
Correct answer: C.
Smoking is forbidden within 25 feet of HazMat including explosives, oxidizers, or flammables.
Question 18 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 19 of 25 · HazMat Driving
What is the speed limit when transporting HazMat through a tunnel?
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A.
Tunnel speed limit minus 10 mph
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B.
Posted limit
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C.
No speed limit applies to HazMat
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D.
Posted speed unless lower limit is posted for HazMat
Correct answer: D.
Follow posted limits; lower limits often apply specifically to HazMat in tunnels.
Question 20 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 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 · 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 23 of 25 · Shipping Papers
Which of these documents must accompany the HazMat?
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A.
Shipping papers
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B.
Hazard placards
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C.
Emergency response info
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D.
All of the above
Correct answer: D.
Shipping papers, placards, and emergency info must all accompany the load.
Question 24 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 25 of 25 · Security
Drivers should report any HazMat shipment that:
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A.
Appears to be tampered with
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B.
Has missing or damaged placards
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C.
Has a strong odor or evidence of leakage
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D.
All of the above
Correct answer: D.
Always report any sign of tampering, damaged placards, or leak evidence.
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 Arkansas Office of Driver Services administers this knowledge test as part of its commercial driver license program. To earn the HazMat Endorsement (H) on your Arkansas CDL, you need to score at least 24 out of 30 on the official version.
Topics covered on this practice test
- Placards: 6 questions
- HazMat Driving: 5 questions
- Shipping Papers: 3 questions
- Security: 2 questions
- Emergencies: 2 questions
- HazMat Basics: 2 questions
- Parking: 2 questions
- CDL Rules: 1 question
- Emergency Equipment: 1 question
- Loading: 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 Arkansas 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.