Wisconsin CDL Hazardous Materials Practice Test

The Wisconsin CDL Hazardous Materials test is a multiple-choice knowledge test you take for your commercial learner's permit. Wisconsin Department of Transportation, Division of Motor Vehicles (Wisconsin DMV) says you need 80% to pass (source).

Last updated Oct 7, 2026. FirstTry CDL is a CDL permit test prep site by Hive Asset Group, LLC.

By Scott Wilder, Editor

Last reviewed against the Wisconsin CDL manual on October 7, 2026

Scott Wilder on X | scottwilderhq.com

FirstTry CDL is a CDL permit test prep site by Hive Asset Group, LLC. It offers free exam-style practice tests built from the official CDL manual. FirstTry CDL is not affiliated with any DMV, FMCSA or government agency. Practice questions are exam-style questions built from the official CDL manual, not actual test questions.

Wisconsin CDL permit facts

What	What Wisconsin says	Source
Hazardous Materials pass mark	80%	Official page
Hazardous Materials test questions	30	Official page
CLP fee	$30, valid 180 days (Class A, B or C)	Official page
CLP holding period	Hold the CLP for 14 days before you take a skills test	Official page
Knowledge test retest rule	If you fail, you can retake no sooner than the next day. You may take the same test only five times in one year. After five tries you need special permission from DMV staff	Official page
Test languages	General knowledge, combination, air brakes, doubles and triples, passenger and tanker tests are offered in English, American Sign Language (video), Burmese, Croatian, Polish, Russian, Serbian and Spanish. The hazmat and school bus tests are English only. Translators and audio assist are not allowed on CDL tests.	Official page

20 question Hazardous Materials practice test

1. A placarded vehicle with no explosives is parked. How far must it be from an open fire?
1. A. At least 50 feet
2. B. At least 300 feet
3. C. At least 100 feet
4. D. At least 25 feet
Show answer
Answer: B. At least 300 feet
Do not park within 300 feet of an open fire.
From the official CDL manual, section 9.6.2.
2. A radioactive package has a total transport index of 5.1 to 10.0. How far must it be from people?
1. A. 1 foot
2. B. 2 feet
3. C. 3 feet
4. D. 4 feet
Show answer
Answer: C. 3 feet
Table 9.7B shows 3 ft for a transport index of 5.1 to 10.0.
From the official CDL manual, section 9.7.5 Required Notification (Table 9.7B).
3. When may you move an improperly placarded vehicle?
1. A. When the trip is short
2. B. At night only
3. C. When the shipper says it is OK
4. D. During an emergency, to protect life or property
Show answer
Answer: D. During an emergency, to protect life or property
Only in an emergency, to protect life or property.
From the official CDL manual, section 9.3.10 Placarding.
4. What must a driver do about the special hazmat transport rules?
1. A. Follow all of them
2. B. Follow them only on highways
3. C. Follow them only for large loads
4. D. Follow only the ones the shipper names
Show answer
Answer: A. Follow all of them
The driver follows all special rules about transporting hazardous materials.
From the official CDL manual, section 9.2.3.
5. What does the shipper's signed certification say?
1. A. The shipment was prepared following the regulations
2. B. The driver checked every package
3. C. The load is under 1,001 pounds
4. D. The vehicle has the right placards
Show answer
Answer: A. The shipment was prepared following the regulations
The shipper signs to say the shipment was prepared according to the regulations.
From the official CDL manual, section 9.3.4 The Shipping Paper.
6. Who uses the hazmat regulations to find the hazard class and packing group of a product?
1. A. The shipper
2. B. The receiver
3. C. The weigh station officer
4. D. The driver
Show answer
Answer: A. The shipper
The shipper uses the regulations to determine the product's hazard class, packing group, and more.
From the official CDL manual, section 9.2.1.
7. How close to the traveled part of the road may you NEVER park with Division 1.1 explosives?
1. A. Within one foot
2. B. Within five feet
3. C. Within 25 feet
4. D. Within 100 feet
Show answer
Answer: B. Within five feet
Never park within five feet of the traveled part of the road.
From the official CDL manual, section 9.6.1 Parking with Division 1.1, 1.2, or 1.3 Explosives.
8. You are about to load flammable liquids. When should your engine be off?
1. A. Only after the tank is half full
2. B. It can always stay on
3. C. Only when it is raining
4. D. Before loading or unloading starts
Show answer
Answer: D. Before loading or unloading starts
Turn off your engine before loading or unloading any flammable liquids.
From the official CDL manual, section 9.5.3.
9. Which event requires a phone report after a hazardous materials incident?
1. A. A major road is closed for one hour or more
2. B. A road is slow for 5 minutes
3. C. A lane is closed for 10 minutes
4. D. A truck stop runs out of fuel
Show answer
Answer: A. A major road is closed for one hour or more
A report is required if major transportation arteries or facilities are closed for one hour or more.
From the official CDL manual, section 9.7.5 Required Notification.
10. You carry a small amount of chlorine and are not placarded. At a railroad crossing, what must you do?
1. A. Slow down only
2. B. Stop only if a train is seen
3. C. Drive across
4. D. Stop, since any amount of chlorine requires a stop
Show answer
Answer: D. Stop, since any amount of chlorine requires a stop
You must stop if your vehicle carries any amount of chlorine.
From the official CDL manual, section 9.6.12 Stop before Railroad Crossings.
11. One tire on your hazmat truck is leaking. How far may you drive on it?
1. A. Only to the nearest safe place to fix it
2. B. To the next planned stop
3. C. To the delivery, if it is near
Show answer
Answer: A. Only to the nearest safe place to fix it
Do not drive on a leaking or flat tire except to the nearest safe place to fix it.
From the official CDL manual, section 9.6.9.
12. You load breakable corrosive liquid containers by hand. How do you load them?
1. A. Two at a time
2. B. Rolled across the floor
3. C. Thrown from the dock
4. D. One by one
Show answer
Answer: D. One by one
Load breakable containers of corrosive liquid one by one.
From the official CDL manual, section 9.4.1.
13. Where must you NOT load nitric acid?
1. A. Below other products
2. B. Above any other product
3. C. On the floor
4. D. Next to the wall
Show answer
Answer: B. Above any other product
Do not load nitric acid above any other product.
From the official CDL manual, section 9.4.1 Class 8 (Corrosive) Materials.
14. Besides a gas mask, what must a driver hauling chlorine in cargo tanks carry?
1. A. A spare tank
2. B. A flare kit
3. C. An emergency kit for leaks in the dome cover plate fittings
Show answer
Answer: C. An emergency kit for leaks in the dome cover plate fittings
The driver must also have an emergency kit for controlling leaks in dome cover plate fittings.
From the official CDL manual, section 9.6.11.
15. When may you move flammable compressed gas from one tank to another on a public road?
1. A. When fueling road construction or maintenance machinery
2. B. When the tanks are almost empty
3. C. When it is dark
4. D. When the weather is dry
Show answer
Answer: A. When fueling road construction or maintenance machinery
The exception is fueling machinery used in road construction or maintenance.
From the official CDL manual, section 9.7.4 Responses to Specific Hazards.
16. Which packages are often used for hazardous materials shipments?
1. A. Paper bags
2. B. Cylinders and drums
3. C. Plastic wrap
4. D. Cardboard envelopes
Show answer
Answer: B. Cylinders and drums
Cylinders and drums are often used for hazmat shipments.
From the official CDL manual, section 9.3.8 Recognizing Hazardous Materials.
17. Which party sends products from one place to another by truck, rail, vessel, or airplane?
1. A. The driver
2. B. The shipper
3. C. The inspector
4. D. The carrier
Show answer
Answer: B. The shipper
The manual says the shipper sends the products.
From the official CDL manual, section 9.2.1.
18. When may you accept the shipper's certification about packaging?
1. A. Only after you open every package
2. B. Never, the driver must repack it
3. C. Only if the load is under 1,001 pounds
4. D. Unless the package is clearly unsafe or breaks the rules
Show answer
Answer: D. Unless the package is clearly unsafe or breaks the rules
You may accept the certification unless the package is clearly unsafe or does not comply.
From the official CDL manual, section 9.3.6 Shipper's Certification.
19. Part of your vehicle was exposed to a corrosive liquid. What must be done?
1. A. Wipe it with a dry cloth
2. B. Leave it until the next trip
3. C. Wash it thoroughly with water
4. D. Cover it with a tarp
Show answer
Answer: C. Wash it thoroughly with water
Parts of the vehicle exposed to a corrosive liquid must be thoroughly washed with water.
From the official CDL manual, section 9.7.4 Responses to Specific Hazards.
20. Police arrive at a hazmat spill from your load. What must you give them?
1. A. The emergency response information
2. B. Only your driver's license
3. C. Only your trip log
4. D. Your placard table
Show answer
Answer: A. The emergency response information
The driver must give emergency response information to authorities at or investigating an incident.
From the official CDL manual, section 9.3.5 The Item Description.

Wisconsin CDL Hazardous Materials questions

What score do you need to pass the Wisconsin CDL Hazardous Materials test?

Wisconsin says you need 80% to pass the Hazardous Materials test.

Is the Wisconsin CDL Hazardous Materials test the same as other states?

The Hazardous Materials test is built on the same federal knowledge standards in every state, so the topics match the CDL manual. Wisconsin uses its own handbook: https://wisconsindot.gov/Documents/dmv/shared/bds356-cdl-manual.pdf

How much does a CDL permit cost in Wisconsin?

CLP fee: $30, valid 180 days (Class A, B or C).

What languages is the Wisconsin CDL knowledge test offered in?

General knowledge, combination, air brakes, doubles and triples, passenger and tanker tests are offered in English, American Sign Language (video), Burmese, Croatian, Polish, Russian, Serbian and Spanish. The hazmat and school bus tests are English only. Translators and audio assist are not allowed on CDL tests.

Sources

https://wisconsindot.gov/Pages/dmv/com-drv-vehs/rqts-for-cdl/cdl-requirements.aspx
https://wisconsindot.gov/Pages/dmv/vehicles/title-plates/dmv-fees.aspx
https://wisconsindot.gov/Pages/dmv/teen-driver/teen-hw-aply/knowledge.aspx
https://wisconsindot.gov/Documents/dmv/shared/bds356-cdl-manual.pdf
Manual sections used in this test: 9.2.1; 9.2.3; 9.3.10 Placarding; 9.3.4 The Shipping Paper; 9.3.5 The Item Description; 9.3.6 Shipper's Certification; 9.3.8 Recognizing Hazardous Materials; 9.4.1; 9.4.1 Class 8 (Corrosive) Materials; 9.5.3; 9.6.1 Parking with Division 1.1, 1.2, or 1.3 Explosives; 9.6.11; 9.6.12 Stop before Railroad Crossings; 9.6.2; 9.6.9; 9.7.4 Responses to Specific Hazards; 9.7.5 Required Notification; 9.7.5 Required Notification (Table 9.7B)

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