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Question 1 of 50
1. Question
Which of the following materials would require placarding as a Division 6.1 (Toxic) material?
CorrectIncorrectHint
Division 6.1 materials are specifically toxic substances that present a hazard through ingestion, inhalation, or skin contact. Ethylene oxide is a common example requiring special handling and placarding
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Question 2 of 50
2. Question
What is the proper shipping name for a solution containing 35% hydrogen peroxide?
CorrectIncorrectHint
Hydrogen peroxide solutions have specific naming requirements based on concentration. Solutions over 8% must be named as “hydrogen peroxide, stabilized” when a stabilizer is present
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Question 3 of 50
3. Question
How many copies of the shipping paper must be kept in the vehicle while transporting hazardous materials?
CorrectIncorrectHint
You must keep at least two copies of shipping papers for HM – one in the cab and one in an exterior location accessible to emergency responders
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Question 4 of 50
4. Question
You are transporting 900 lbs of acetone (Division 3) and 300 lbs of acetone cyanohydrin (Division 6.1). Neither amount individually meets the 1,001 lb threshold for placarding. What is the correct placarding action?
CorrectIncorrectHint
When transporting multiple hazardous materials in the same vehicle, their weights can be combined to determine if the total exceeds 1,001 lbs, requiring placarding for all materials present
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Question 5 of 50
5. Question
You are transporting Class 3 flammable liquids and need to make an overnight stop. What is the proper parking procedure for loading/unloading operations?
CorrectIncorrectHint
Class 3 flammable liquid transport requires careful parking considerations – ventilation away from ignition sources is critical for safety during overnight stops
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Question 6 of 50
6. Question
You notice a small leak from a 55-gallon drum of sodium hydroxide (caustic soda) solution while unloading. The spill is about 2 feet in diameter. What is the appropriate immediate action?
CorrectIncorrectHint
For corrosive material spills, immediate containment followed by controlled neutralization is the proper response sequence. Always prioritize containing the spread before attempting treatment
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Question 7 of 50
7. Question
While stopped at a truck stop, you notice someone unfamiliar taking photos of your placarded vehicle. What should be your immediate response?
CorrectIncorrectHint
Follow established security protocols – document suspicious activity and report it rather than taking direct action that could compromise safety
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Question 8 of 50
8. Question
You are transporting a mixed load containing 600 lbs of dry ice (Division 2.2) and 450 lbs of a Division 4.3 material (dangerous when wet). The vehicle will remain unattended for 8 hours at a temperature of 85°F. What additional precautions are required?
CorrectIncorrectHint
When transporting Division 2.2 materials (especially dry ice) in warm temperatures, consider increased ventilation to prevent oxygen displacement from rapid sublimation, especially when combined with moisture-sensitive materials
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Question 9 of 50
9. Question
You receive a shipping paper with the entry: “Paint, epoxy, flammable (UN1866), PG II, 250 lbs.” What additional information must be verified on this entry?
CorrectIncorrectHint
Drivers must perform comprehensive verification of hazardous materials shipping papers, including matching UN numbers to proper shipping names, confirming hazard classifications, checking weights, and ensuring emergency information is available
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Question 10 of 50
10. Question
You are transporting a tank load of Class 3 flammable liquids and need to descend a steep grade. Which procedure should you follow?
CorrectIncorrectHint
For hazardous materials transport on steep grades, use a combination of proper gear selection, engine braking, and controlled use of auxiliary braking systems while avoiding continuous brake application
Ready for more practice? This practice test continues your preparation with additional questions covering emergency response and hazmat driving. Each question is designed to mirror the difficulty and format of the actual CDL written test.
What This Practice Test Covers
This practice test focuses on:
- emergency response and hazmat driving
- Real-world CDL scenarios
- Questions formatted like the actual DMV test
- Detailed explanations for each answer
Each question helps you build the knowledge and confidence needed for test day. Practice makes perfect — take as many attempts as you need.