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Alabama HazMat CDL Practice Test

Practice for your HazMat CDL exam with questions based on the official Alabama CDL handbook

Updated: August 2026

What's on the Alabama HazMat CDL test

Answering from memory beats re-reading — retrieval practice roughly doubles what you remember a week later. These free questions are modeled on the official HazMat CDL knowledge test.

Questions
30
To pass
24/30 correct (80%)
Updated
June 2026
100% free

The Alabama CDL HazMat test follows the AAMVA standard used by most states: 30 questions, with 24 correct answers (80%) needed to pass. A CDL learner's permit in Alabama costs $36.25 (Alabama Law Enforcement Agency (ALEA) - Driver License Division fee schedule, June 2026).

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Alabama HazMat CDL Practice Test

  1. The shippers package hazardous materials, they must certify that this was done according to the regulations. The only exception is when:

    • The driver is given a sealed cargo compartment
    • The shipper is a private carrier carrying his or her own product
    • The shipment is a hazardous waste

    When companies send out dangerous goods, they must follow rules to pack them safely. The only time they don't have to is if the company is moving its own products and not selling the service.

  2. How many hazard classes are there?

    • 3
    • 9
    • 10

    There are 9 different types of dangers or hazard classes that truck drivers need to know about when they are carrying goods. These classes help them understand what kind of special care or rules they need to follow to keep the roads safe.

  3. Apart from the shipping papers and the packages, what other two locations must display the hazardous material identification number?

    • on the front bumper and on the inside of the cab door.
    • on the exhaust system and on a decal on the dashboard.
    • on the driver’s door and on the steering column.
    • on all bulk packaging and on the cargo tanks.

    Beyond shipping papers and packages, the hazardous material identification number is also required to be shown on cargo tanks and on all bulk packaging.

  4. A driver places placards on their vehicle in order to:

    • to show the vehicle’s maximum legal weight.
    • to advertise the company hauling the load.
    • to communicate risk.
    • to indicate the driver’s route and destination.

    Placards are exterior signs on a vehicle that alert others to the presence of hazardous materials and indicate the hazard class of the load.

  5. Why is the shipper required to sign the shipping paper?

    • To confirm the carrier has inspected and approved the shipment for transport
    • To certify that it has prepared the shipment in accordance with regulations
    • To confirm the carrier has received payment for transporting the shipment

    The shipping paper has to contain the shipper’s certification, signed by the shipper, confirming the shipment was prepared in compliance with the applicable regulations.

  6. Carriers must provide each driver who hauls Division 1.1, 1.2, or 1.3 materials with:

    • a written list of emergency response phone numbers for local fire departments.
    • a copy of FMCSR Part 397.
    • a copy of the shipper’s facility address and receiving hours.

    Carriers are required to give drivers transporting explosives a copy of 49 CFR 397, “Transportation of Hazardous Materials; Driving and Parking Rules.” This part includes rules on hazardous materials routing, including factors to consider when selecting an appropriate route.

  7. Hazardous material identification numbers must be shown on portable tanks, cargo tanks, and other bulk packages. Regulations require black ______ numbers.

    • 75 mm
    • 125 mm
    • 100 mm

    Hazardous material identification numbers must appear on portable tanks, cargo tanks, and other bulk packaging. The rules specify black 100 mm (3.9 inch) numbers on orange panels, placards, or on a white diamond-shaped background when placards are not required.

  8. Helium is classified as a Class ____ hazardous material.

    • 2
    • 9
    • 1

    A hazardous material’s class indicates the type of risk it presents. There are nine hazard classes in total. Class 2 covers gases, including flammable gases (2.1) like propane, non-flammable gases (2.2) like helium, and toxic gases (2.3) such as compressed fluorine.

  9. Who must select the safest route when transporting placarded radioactive materials?

    • The state highway department
    • The receiver/consignee
    • The carrier

    If placarded radioactive materials have to be transported, the carrier is responsible for choosing the safest route. Once the route is selected, the carrier must inform the driver about the radioactive materials and provide the driver with the planned route.

  10. With most hazardous materials, you may park within 5 feet of the road briefly. If your work requires it. The materials that are the exception and do not allow parking this close to the road are?

    • Acids and poisons
    • Corrosives and oxidizers
    • Explosives 1.1 thru 1.3

    When it comes to parking near the road with hazardous materials, you usually can if it's quick and needed for work. But, don't do this with very explosive materials (like fireworks or dynamite), flammable stuff (like gasoline or propane), because it's too dangerous.

  11. A truck as hazardous material, when can it be moved without the placards on the truck?

    • Never
    • When the shipper says it's ok
    • To protect life or property

    If a truck is carrying dangerous materials, it usually must have special signs (placards) on it to show that it is hazardous. However, there is one exception to this rule. The truck can be moved without these signs only if it is necessary to protect people's lives or to prevent property from being damaged. This means safety is the top priority, and in an emergency situation, the truck can be moved even without the placards.

  12. Which option lists a required criterion for a package to qualify as non-bulk packaging?

    • A water capacity of 454 kg (1,000 pounds) or less if it is used as a receptacle for a gas
    • A maximum net mass of 400 kg (882 pounds) or less and a maximum capacity of 450 L (119 gallons) or less if it is used as a receptacle for a solid
    • A maximum capacity of 450 L (119 gallons) or less if it is used as a receptacle for a liquid
    • All of the above

    Non-bulk packaging must meet defined limits when used as a container for solids, liquids, or gases. It qualifies as non-bulk if it is: 450 L (119 gallons) or less for liquids; 400 kg (882 pounds) or less and 450 L (119 gallons) or less for solids; and 454 kg (1,000 pounds) or less for gases.

  13. If you are transporting Division 1.2 or 1.3 materials, what is the minimum distance you must park from a bridge, tunnel, or building?

    • 300 feet
    • 150 feet
    • 250 feet
    • 50 feet

    With a load of Division 1.2 or 1.3 explosives, you are required to park no closer than 300 feet from any bridge, tunnel, or other structure.

  14. Under what circumstances may a shipper shorten (abbreviate) the proper shipping name or hazardous material identification number on a shipping paper?

    • Only if regulations specifically authorize the shipper to do it
    • Only when the shipment is moving by highway within the same state
    • Only when the material is non-flammable and low hazard

    A shipper is not allowed to abbreviate a hazardous material’s identification number, hazard class, or proper shipping name unless the regulations explicitly permit that abbreviation. Abbreviations can interfere with correct identification and create safety risks.

  15. You must stop before a railroad crossing if your vehicle is transporting _______ of chlorine.

    • at least 100 gallons
    • any amount
    • more than 110 gallons

    If you are transporting any quantity of chlorine gas, you are required to stop at every railroad crossing and use extra caution before crossing. A train collision could cause a chlorine release, which is very dangerous because chlorine gas is poisonous. (If chlorine is being hauled in cargo tanks, a gas mask must be available in the cab.) Chlorine is also a strong oxidizer and can react with flammables to start fires, which may spread corrosive or toxic gases.

  16. You may allow another person to watch your vehicle only when it is…

    • parked at a public rest area while you take a break.
    • being watched by any licensed driver.
    • on the property of the shipper, carrier, or receiver.

    You may let someone else watch your vehicle only when you are on the property of the shipper, carrier, or consignee/receiver, since those parties understand the hazards and how to handle them.

  17. Which hazard class covers both flammable gases and non-flammable gases?

    • 2
    • 4
    • 9

    A material’s hazard class indicates the type of risk it presents. There are nine hazard classes. Hazard Class 2 is for gases, including flammable gases (2.1) like propane, non-flammable gases (2.2) like helium, and toxic gases (2.3) such as compressed fluorine.

  18. If you think there may be a cargo fire in your trailer and the cargo doors feel hot, what should you do?

    • crack the doors slightly to let heat and smoke escape.
    • leave the doors closed.
    • swing the doors fully open to ventilate the trailer.

    Hot cargo doors make it more likely a fire is burning inside. Opening the doors would add oxygen and can intensify the fire. Keeping the doors shut limits oxygen, so the fire may only smolder until firefighters arrive.

  19. By law, how regularly must employees involved in transporting hazardous materials be tested?

    • Within 90 days of hire and then every 3 years
    • Within 90 days of hire and then every 6 months
    • At least every 5 years

    People who transport dangerous stuff must be tested within 90 days of starting their job and then every 3 years to make sure they know how to handle these materials safely.

  20. Symbol column, the letter "G" stands for?

    • Identifies the proper shipping name for which one or more technical names of the hazardous material must be entered in parentheses, along with the basic description
    • Identifies the proper shipping name
    • Gases

    The letter "G" means you need to write the hazardous material's specific name next to its general name when shipping it.

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All Alabama CDL tests

The Alabama HazMat test is one section of the Alabama CDL knowledge exam. For the full set — general knowledge questions, every endorsement section, and Alabama’s permit requirements in one place — go to the Alabama CDL permit practice test.

More free CDL practice tests

About the HazMat Test in Alabama

The HazMat endorsement test is required in Alabama for drivers who transport hazardous materials. It covers placarding, labeling, loading procedures, emergency response, and compliance with federal hazmat regulations. A TSA background check is also required.

The HazMat test is part of the CDL written exam administered by the Alabama Department of Motor Vehicles. You must pass this test along with the other required written tests to receive your Commercial Learner's Permit (CLP) in Alabama.

Our practice questions are built from the official Alabama CDL handbook and federal FMCSA regulations. Each question includes a detailed explanation to help you understand the material, not just memorize answers.

Alabama HazMat endorsement facts

Alabama CDL facts, each with its official source
FactValueSource
CDL testing fee$25No checks acceptedalea.gov
Endorsements a CLP can carryPassenger (P), school bus (S) and tank vehicle (N) onlyHazMat and doubles/triples are added to the CDL, never to the CLPalea.gov
Entry-Level Driver TrainingRequired for anyone obtaining a CDL for the first timeProviders are listed on the FMCSA Training Provider Registryalea.gov
Minimum age18 for a restricted Class A or B CDL; 21 for an unrestricted Class A or B, and for Class CALEA Administrative Code chapter 760-X-1, Table 2 (revised 6/14/26)admincode.legislature.state.al.us
Non-U.S. citizensMust be in permanent legal status in the United States and domiciled in Alabamaalea.gov
DOT medical certificationAccepted only by electronic submission from the medical examinerPaper cards and online uploads are no longer accepted (National Registry II)effective June 23, 2025alea.gov
Self-certificationEvery Class A, B or C CDL holder certifies the type of commercial operation (online at alabamadl.alea.gov)alea.gov
Online CDL accountView or update your DOT medical card and self-certification at alabamadl.alea.gov (“Commercial Drivers” tab)alea.gov
Knowledge and skills test appointmentsBook online — Driver License › Online Services › Schedule DL Appointment lists the offices that offer online schedulingalea.gov
CDL testing officesCDL Headquarters 334.676.7394; CDL district offices are listed on the Driver License pagealea.gov
Licensing agencyAlabama Law Enforcement Agency (ALEA), Driver License Divisionalea.gov
TSA background checkRequired when obtaining or transferring a hazardous materials endorsementalea.gov
HazMat knowledge testA special written examination on recognizing, handling and transporting hazardous materialsRequired for any class (A, B or C) that hauls placarded hazmatalea.gov
If TSA finds a security threatTSA notifies you and the state denies the endorsementThe check covers criminal, immigration and FBI recordsalea.gov
Class C CDLCovers vehicles placarded for hazardous materials (or built for 16+ passengers) that are not Class A or Balea.gov
X endorsementTanker/Hazardous Materials combinedalea.gov
TSA security threat assessment fee (federal)$85.25Non-refundable; paid to TSA, not the stateeffective January 1, 2025tsa.gov
TSA reduced fee (valid TWIC holders, where the state accepts it)$41tsa.gov
TSA clearance validity5 yearstsa.gov
When to enroll with TSAAt least 60 days before you need the endorsementTSA says some applications take more than 45 daystsa.gov

How to add the HazMat endorsement in Alabama

  1. If you are not a U.S. citizen, you must be in permanent legal status and domiciled in Alabama — ALEA checks this for every CDL and CLP applicant. Source
  2. Pass the hazardous materials written examination at an ALEA CDL office ($25 testing fee). The H endorsement can be added to a Class A, B or C CDL, but never to a learner permit. Source
  3. Complete the TSA security threat assessment — ALEA requires the background check whenever you obtain or transfer a hazardous materials endorsement. Source
  4. TSA reviews criminal, immigration and FBI records; if it finds you a security threat it notifies you and Alabama denies the endorsement. Source
  5. Check that your DOT medical card and self-certification show correctly at alabamadl.alea.gov (“Commercial Drivers” tab) before you apply for the endorsement. Source

As of September 2, 2026, verified against Alabama Law Enforcement Agency (ALEA), Driver License Division.

Alabama CDL questions

How do I submit my DOT medical card to ALEA?
You don’t — since June 23, 2025 ALEA accepts DOT medical certifications only by electronic submission from the medical examiner (National Registry II); paper cards and online uploads are no longer accepted. Check that the card and your self-certification show correctly at alabamadl.alea.gov under “Commercial Drivers”; if the information is missing, ALEA removes CDL privileges 45 days after its notice. Source
What does Alabama require for a hazmat (H) endorsement?
A TSA security threat assessment (background check) whenever you obtain or transfer the endorsement, plus a special written hazmat examination at an ALEA CDL office ($25 testing fee). The H endorsement can go on a Class A, B or C CDL but never on a learner permit — only P, S and N can be added to a CLP. ALEA lists no separate endorsement fee; TSA’s fee is paid to TSA. Source
How old do you have to be to get a CDL in Alabama?
ALEA’s administrative code (chapter 760-X-1, Table 2) sets 18 as the minimum age for a restricted Class A or B CDL and 21 for an unrestricted Class A or B — and for Class C, the class that covers placarded hazmat and 16-plus-passenger vehicles. Source

What to study for the Alabama HazMat test

  • The regulations, shipping papers and marking/labeling[49 CFR 383.121]

    The hazardous materials table, shipping-paper requirements, package marking and labeling, preparation rules, ORM-D, and how to report a hazmat incident.

  • Loading, handling and segregation[49 CFR 383.121]

    Forbidden materials and packages, loading and unloading rules, keeping incompatible materials apart, carrying hazmat on a passenger-carrying bus, attending and parking a loaded vehicle, and safe havens.

  • Placards — when a load needs one[49 CFR 172.504]

    A placard is the diamond-shaped hazard-class sign a vehicle must display on each side and each end once it carries a placardable quantity. Most hazard classes require placards at any quantity; the lower-hazard "Table 2" materials only need them once the load passes 1,001 pounds aggregate (bulk packagings excepted).

  • Emergency response[49 CFR 383.121]

    What to do in different kinds of accidents, precautions around fire and while fueling or smoking, and the extra rules that apply to Class 1.1 and 1.2 explosives.

  • The nine hazard classes[49 CFR 173.2]

    Class 1 Explosives · Class 2 Gases (2.1 flammable, 2.2 non-flammable compressed, 2.3 poisonous) · Class 3 Flammable and combustible liquids · Class 4 Flammable solids, spontaneously combustible materials, dangerous-when-wet materials · Class 5 Oxidizers and organic peroxides · Class 6 Poisonous (toxic) materials and infectious substances · Class 7 Radioactive materials · Class 8 Corrosives · Class 9 Miscellaneous hazardous materials.

HazMat test questions, explained

Why does the same product sometimes need a placard and sometimes not?[49 CFR 172.504]
Placarding is triggered by quantity and hazard-class table, not by the product’s name. A vehicle carrying any amount of most hazard classes needs placards; a load of the lower-hazard "Table 2" materials only needs them once it passes 1,001 pounds aggregate. That is why a van with a few cases of a flammable product may run unplacarded while a bulk tank of the same product must display placards on every side.
Why is there no skills/driving test for the HazMat endorsement?[49 CFR 383.141]
The H endorsement tests knowledge, not driving skill — you already proved you can operate the vehicle class when you earned the underlying CDL. What HazMat adds on top of the knowledge test is a security layer: the Transportation Security Administration has to clear you with a fingerprint-based background check before a state can issue the endorsement, which is why HazMat can take longer than any other endorsement even though the test itself is one sitting.
Why do I need training before the test if it is knowledge-only?
Entry-level driver training for a first HazMat endorsement is theory instruction — there is no behind-the-wheel component — covering the same regulation areas the knowledge test draws from: basic and operational hazmat requirements, loading and unloading, bulk packages, and emergency response. It exists so you have already studied the material once with a registered provider before you sit the test, not to teach a separate driving skill.
Can I get the exact Alabama HazMat test answers?
No honest source can hand you the exact test: Alabama’s knowledge test draws its questions from a randomized pool, so the exact set and order are not fixed page to page. The fastest real path is understanding why each answer is correct, not memorizing a fixed list. Try the free HazMat practice test below — every question ships with an explained answer.

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