Texas CDL Hazardous Materials Practice Test

The Texas CDL Hazardous Materials test is a multiple-choice knowledge test you take for your commercial learner's permit. Texas Department of Public Safety (DPS), Driver License Division 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 Texas 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.

Texas CDL permit facts

What	What Texas says	Source
Hazardous Materials pass mark	80%	Official page
CLP fee	$25 (expires 180 days from issue)	Official page
CLP validity	180 days, or until your Texas driver license expires, whichever is first	Official page
CLP holding period	Hold the CLP at least 14 days before the skills test	Official page
Knowledge test retest rule	After a failed test, your application stays active for 90 days. After 90 days or three failed attempts, whichever comes first, you must submit a new application, pay fees again and retest	Official page
Test languages	All CDL and CLP knowledge exams are English only since June 1, 2026. Spanish tests are no longer offered and interpreters are not allowed. Skills tests are English only. Drivers who cannot show enough English are not eligible for a Texas CDL or CLP.	Official page

20 question Hazardous Materials practice test

1. Who do the hazmat regulations aim to protect?
1. A. Only the driver
2. B. Only the cargo owner
3. C. Only the road surface
4. D. You, people around you, and the environment
Show answer
Answer: D. You, people around you, and the environment
The regulations protect you, those around you, and the environment.
From the official CDL manual, section 9.1.1 Contain the Material.
2. 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.
3. Where can you find other materials you must keep apart?
1. A. The tire chart
2. B. The weather report
3. C. The fuel log
4. D. The Segregation Table for Hazardous Materials
Show answer
Answer: D. The Segregation Table for Hazardous Materials
The regulations name other materials to keep apart in the Segregation Table.
From the official CDL manual, section 9.4.1.
4. How many different hazard classes are there?
1. A. Five
2. B. Seven
3. C. Nine
4. D. Twelve
Show answer
Answer: C. Nine
The manual says there are nine different hazard classes.
From the official CDL manual, section 9.3.1 Definitions.
5. Who pays for cleanup of roads and ditches after a leak from your vehicle?
1. A. The state
2. B. The carrier
3. C. The shipper's customer
4. D. The local fire department
Show answer
Answer: B. The carrier
The carrier pays for the cleanup of contaminated parking lots, roadways, and drainage ditches.
From the official CDL manual, section 9.7.3 Fires.
6. You are fueling a truck that carries hazardous materials. Who must be at the nozzle?
1. A. No one, if the nozzle locks open
2. B. Someone, controlling the fuel flow, at all times
3. C. Only the shipper
Show answer
Answer: B. Someone, controlling the fuel flow, at all times
Someone must always be at the nozzle, controlling fuel flow.
From the official CDL manual, section 9.6.7.
7. A shipping paper for hazardous materials must include what for each hazardous material?
1. A. A photo of the package
2. B. The price of the material
3. C. A proper shipping description
4. D. The driver's signature
Show answer
Answer: C. A proper shipping description
The shipping paper must include a proper shipping description for each hazardous material.
From the official CDL manual, section 9.3.4 The Shipping Paper.
8. What must you do with your engine before you load or unload explosives?
1. A. Leave it idling for air
2. B. Run it at high idle
3. C. Keep it on for the heater
4. D. Turn it off
Show answer
Answer: D. Turn it off
Turn your engine off before loading or unloading any explosives.
From the official CDL manual, section 9.4.1 Class 1 (Explosives) Materials.
9. Which name goes with Division 1.1?
1. A. Projection Hazard
2. B. Mass Explosion
3. C. Fire Hazard
4. D. Minor Explosion
Show answer
Answer: B. Mass Explosion
Table 9.1 lists Division 1.1 as Mass Explosion.
From the official CDL manual, section 9.3.1 Definitions.
10. Where must emergency response information be kept?
1. A. In the same place as the shipping paper
2. B. In the glove box only
3. C. In the sleeper berth
Show answer
Answer: A. In the same place as the shipping paper
Emergency response information must be kept in the same location as the shipping paper.
From the official CDL manual, section 9.6.10.
11. Your vehicle had a Division 6.1 poison leak. What must happen before you use it again?
1. A. It must be checked for stray poison
2. B. It must be painted
3. C. It must be weighed
4. D. It must be refueled
Show answer
Answer: A. It must be checked for stray poison
The vehicle must be checked for stray poison before being used again.
From the official CDL manual, section 9.7.4 Responses to Specific Hazards.
12. How many lists should you check for a material's name before you transport it?
1. A. One
2. B. Two
3. C. Five
4. D. Three
Show answer
Answer: D. Three
The manual says to look for the material's name on three lists.
From the official CDL manual, section 9.3.3 Lists of Regulated Products.
13. 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.
14. Who must warn drivers and others about the hazards of a material?
1. A. The shipper
2. B. The dispatcher
3. C. The receiver
4. D. The weigh station
Show answer
Answer: A. The shipper
Shippers must warn drivers and others about the hazards.
From the official CDL manual, section 9.1.2 Communicate the Risk.
15. A package has a transport index of 10.1 to 20.0. What is the minimum distance to undeveloped film for over 12 hours?
1. A. 12 feet
2. B. 16 feet
3. C. 22 feet
4. D. 29 feet
Show answer
Answer: C. 22 feet
For 10.1 to 20.0, the over 12 hours column is 22 ft.
From the official CDL manual, section 9.7.5 Required Notification (Table 9.7A).
16. What is the highest total transport index allowed for all packages in one vehicle?
1. A. 10
2. B. 50
3. C. 100
4. D. 25
Show answer
Answer: B. 50
The total transport index of all packages in a single vehicle must not exceed 50.
From the official CDL manual, section 9.4.1 Class 7 (Radioactive) Materials.
17. When may you try to limit the spread of leaking hazardous material?
1. A. Only if you can safely do so
2. B. Always, before you call anyone
3. C. Only after the cargo is gone
4. D. Never, under any condition
Show answer
Answer: A. Only if you can safely do so
The manual says to limit the spread only if you can safely do so.
From the official CDL manual, section 9.7.2 Crashes/Incidents.
18. What must you do to get a hazmat endorsement on your CDL?
1. A. Work for a shipper for one year
2. B. Get a letter from your carrier
3. C. Pass a written test about hazardous materials
4. D. Pass only a road test in an empty truck
Show answer
Answer: C. Pass a written test about hazardous materials
You must pass a written test about transporting hazardous materials.
From the official CDL manual, section 9.1.3 Assure Safe Drivers and Equipment.
19. Which bulk package does NOT need to show the owner's name or shipping name?
1. A. An intermediate bulk container (IBC)
2. B. A portable tank
3. C. A cargo tank
Show answer
Answer: A. An intermediate bulk container (IBC)
IBCs are bulk packages, but they are not required to have the owner's name or shipping name.
From the official CDL manual, section 9.5.1.
20. You may let someone else watch your parked explosives vehicle only on whose property?
1. A. The shipper's, carrier's, or consignee's
2. B. A truck stop owner's
3. C. A public rest area's
4. D. A friend's home
Show answer
Answer: A. The shipper's, carrier's, or consignee's
Someone else may watch only on the shipper's, carrier's, or consignee's property.
From the official CDL manual, section 9.6.1 Parking with Division 1.1, 1.2, or 1.3 Explosives.

Texas CDL Hazardous Materials questions

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

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

Is the Texas 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. Texas uses its own handbook: https://www.dps.texas.gov/internetforms/Forms/DL-7C.pdf

How much does a CDL permit cost in Texas?

CLP fee: $25 (expires 180 days from issue).

What languages is the Texas CDL knowledge test offered in?

All CDL and CLP knowledge exams are English only since June 1, 2026. Spanish tests are no longer offered and interpreters are not allowed. Skills tests are English only. Drivers who cannot show enough English are not eligible for a Texas CDL or CLP.

Sources

https://www.dps.texas.gov/internetforms/Forms/DL-7C.pdf
https://www.dps.texas.gov/section/driver-license/driver-license-fees
https://www.dps.texas.gov/section/driver-license/how-do-i-apply-commercial-driver-license
Manual sections used in this test: 9.1.1 Contain the Material; 9.1.2 Communicate the Risk; 9.1.3 Assure Safe Drivers and Equipment; 9.3.1 Definitions; 9.3.3 Lists of Regulated Products; 9.3.4 The Shipping Paper; 9.4.1; 9.4.1 Class 1 (Explosives) Materials; 9.4.1 Class 7 (Radioactive) Materials; 9.5.1; 9.6.1 Parking with Division 1.1, 1.2, or 1.3 Explosives; 9.6.10; 9.6.7; 9.7.2 Crashes/Incidents; 9.7.3 Fires; 9.7.4 Responses to Specific Hazards; 9.7.5 Required Notification; 9.7.5 Required Notification (Table 9.7A)

Hazardous Materials practice test in nearby states