25 realistic Hazardous Materials practice questions for South Carolina CDL applicants. Required for: Drivers transporting placarded hazardous materials. Official test: 30 questions, 24 correct to pass.
Question 1 of 25 · Shipping Papers
What information must a HazMat driver have on the bills of lading?
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A.
Total quantity by weight or volume
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B.
Number and type of packages
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C.
Shipping name and hazard class
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D.
All of the above
Correct answer: D.
All of these must be included for HazMat shipments.
Question 2 of 25 · Parking
When parking HazMat overnight, you should:
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A.
Park near homes
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B.
Choose well-lit, safe areas away from people and buildings
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C.
Park on the shoulder of any road
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D.
Park in residential areas
Correct answer: B.
Use safe, well-lit parking areas away from people and buildings.
Question 3 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 4 of 25 · Emergencies
Which of these is the best advice if you have a HazMat leak?
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A.
Continue to the destination
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B.
Stop, secure the area, communicate the danger, get help
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C.
Try to repair it yourself
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D.
Cover the leak
Correct answer: B.
Stop, secure, communicate, and get qualified help. Don't try to handle leaks yourself.
Question 5 of 25 · HazMat Basics
Which HazMat is most dangerous if released into the environment?
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A.
Class 7 radioactive
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B.
Class 4 flammable solid
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C.
All HazMat are dangerous and require precaution
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D.
Class 9 miscellaneous
Correct answer: C.
Treat every HazMat shipment as dangerous and follow all rules.
Question 6 of 25 · Security
Which is true about HazMat training?
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A.
Drivers must be retrained every 3 years
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B.
Training is optional
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C.
Only new drivers need training
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D.
Training is the same as for non-HazMat
Correct answer: A.
HazMat training is required every three years, including security awareness.
Question 7 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 8 of 25 · HazMat Basics
How many hazard classes are there?
Correct answer: C.
There are nine UN hazard classes used for HazMat transportation.
Question 9 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 10 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.
Question 11 of 25 · Emergency Equipment
Which type of fire is most likely to occur with HazMat?
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A.
Tire fires
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B.
Electrical fires
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C.
Engine compartment fires
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D.
All of the above
Correct answer: D.
Any of these can occur — pre-trip and en-route inspections reduce risk.
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 · 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 14 of 25 · Loading
Which of the following must NEVER be transported with a HazMat shipment?
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A.
Routine cargo
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B.
Other foods
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C.
Class A or B explosives without segregation tables
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D.
Pet food
Correct answer: C.
Explosives have strict segregation rules. Always consult the segregation table.
Question 15 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 16 of 25 · Tank Operations
What does the term "outage" mean in HazMat tank operations?
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A.
Loss of electrical power
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B.
Empty space left in a tank to allow for liquid expansion
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C.
Out-of-service tank
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D.
A leak in the tank
Correct answer: B.
Outage is the empty space left for liquid expansion due to temperature changes.
Question 17 of 25 · Emergency Equipment
Are flares allowed when stopped near a HazMat leak?
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A.
Yes, always use flares
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B.
No, do not use flares near a HazMat leak — use reflective triangles
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C.
Only with permission
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D.
Only at night
Correct answer: B.
Open flames are dangerous near leaks. Use reflective triangles instead.
Question 18 of 25 · Hours of Service
Drivers transporting hazardous materials must keep a written record of duty status because:
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A.
It's a federal regulation for HazMat operations
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B.
Insurance requires it
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C.
It looks professional
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D.
Drivers don't need to keep records
Correct answer: A.
Federal hours-of-service rules apply to HazMat drivers as to other CMV drivers.
Question 19 of 25 · Shipping Papers
Where do you find a list of names of hazardous wastes?
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A.
EPA Hazardous Waste Manifest
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B.
Driver manual
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C.
Local newspaper
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D.
CDL handbook
Correct answer: A.
Hazardous waste appears on the EPA hazardous waste manifest, signed by both shipper and driver.
Question 20 of 25 · Parking
When can a HazMat shipment be left unattended?
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A.
Whenever the driver leaves the vehicle
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B.
Only in safe locations such as a carrier facility
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C.
Anywhere with a sign
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D.
Only on private roads
Correct answer: B.
HazMat must be attended unless parked at a carrier facility or other approved location.
Question 21 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 22 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 23 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 24 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 25 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.
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 South Carolina Department of Motor Vehicles administers this knowledge test as part of its commercial driver license program. To earn the HazMat Endorsement (H) on your South Carolina CDL, you need to score at least 24 out of 30 on the official version.
Topics covered on this practice test
- HazMat Basics: 4 questions
- Loading: 4 questions
- Shipping Papers: 3 questions
- Parking: 2 questions
- HazMat Driving: 2 questions
- Emergencies: 2 questions
- Security: 2 questions
- Emergency Equipment: 2 questions
- Rail Crossings: 1 question
- Placards: 1 question
- Tank Operations: 1 question
- Hours of Service: 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 South Carolina 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.