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Arizona HazMat CDL Practice Test

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

Updated: August 2026

What's on the Arizona 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 Arizona 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 Arizona costs $25 (Arizona Motor Vehicle Division (MVD) / Arizona Department of Transportation (ADOT) fee schedule, June 2026).

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Arizona 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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About the HazMat Test in Arizona

The HazMat endorsement test is required in Arizona 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 Arizona 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 Arizona.

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

Arizona HazMat endorsement facts

Arizona CDL facts, each with its official source
FactValueSource
CDL, Class C (new or transfer from another state)$12.5Arizona law requires a Class C CDL to carry either a passenger endorsement or the HMEazdot.gov
Knowledge test feeNo separate charge — you pay the fee for the class of licence before testingazdot.gov
Endorsement fee (doubles/triples, tank, HazMat, passenger)$10School bus endorsement: no fee. Charged per endorsement, on the permit and on the licenceazdot.gov
HazMat (H) endorsement fee charged by MVD$10Separate from the TSA threat-assessment fee, which is paid to TSAazdot.gov
HME at CDL renewal$10Includes the required HazMat knowledge testazdot.gov
Replacement / duplicate CDL$12Also charged when a medical restriction has to be added to your credentialazdot.gov
How MVD takes paymentCash, check or money order payable to Motor Vehicle Division; cards at some officesazdot.gov
Knowledge test pass mark80 percent on each testazdot.gov
Knowledge test retake waitNext business dayapps.azdot.gov
Where and when knowledge tests are givenAny Arizona MVD office, 7:30 a.m.–3:00 p.m., no appointment necessaryazdot.gov
HazMat knowledge test attempts (renewal)Unlimited attempts, no more than one per dayazdot.gov
HazMat on a permitThe HME is never issued on a commercial learner permitA Class C permit must instead carry a passenger endorsementazdot.gov
Minimum age18 for an intrastate-only Arizona CDL; 21 for interstate driving and placarded hazmatazdot.gov
Minimum age in statuteA.R.S. § 28-3153(A)(3): no Class A, B or C licence under 21 except an intrastate-restricted licence from age 18azleg.gov
English proficiencyArizona statute bars a Class A, B or C licence for an applicant who fails to demonstrate proficiency in English as determined by the departmentazleg.gov
Arizona domicileArizona must be your state of domicile — no Class A, B or C licence otherwiseazdot.gov
Proof of statusProof of U.S. citizenship or lawful permanent residency for any Arizona CDL or CLPMVD also accepts an unexpired foreign passport (not Canada or Mexico) with an I-94 showing H-2A, H-2B or E-2apps.azdot.gov
Documentation ruleLegal presence plus proof Arizona is your home state — A.R.S. 28-3153(D) and 49 CFR 383.71apps.azdot.gov
Medical certificate renewalEvery 24 months or sooner; lapse suspends and revokes CDL privilegesazdot.gov
Entry-Level Driver TrainingRequired before the skills test for a first Class A or B CDL, a Class B→A upgrade, and a first S, P or H endorsementTheory, range and road curriculum from an FMCSA-registered providerazdot.gov
CDL validityUp to 8 years; renew up to six months earlyazdot.gov
Where to goMVD publishes locations for MVD offices, CDL test tracks, third parties, training schools and ports of entryazdot.gov
Study materialArizona Commercial Driver License Manual, revised 08/2026apps.azdot.gov
Licensing agencyArizona Department of Transportation (ADOT), Motor Vehicle Division (MVD)Knowledge tests at any MVD office; road/skills tests at a CDL officeazdot.gov
When Arizona makes you take the HazMat testOriginal CDL, adding H to an existing CDL, CDL renewal, and transferring an out-of-state CDL while keeping HThe federal three-year retest rule is an employer obligation, not an MVD oneazdot.gov
HazMat knowledge testQuestions come from the Hazardous Materials section of the Arizona Commercial Driver License Manualazdot.gov
Order of the HazMat processWritten tests first — the TSA threat assessment starts only after MVD qualifies youazdot.gov
HazMat Background Check Authorization formMVD issues it after you pass the written tests; you present it at a TSA-authorized fingerprint siteazdot.gov
Where to apply for the HMEAny MVD office processes new HME applicationsazdot.gov
How long TSA approval takesUp to 45 days per MVD; TSA itself says one to eight weeksazdot.gov
STA validity and warningValid up to five years from approval; MVD notifies you 60 days before the STA expires, not before the licence expiresazdot.gov
CDL while you wait for TSAYou may take a CDL without the HME until approval arrives — no extra fee to exchange it, because the endorsement fee is already paidazdot.gov
Renewing the HMETake the HME knowledge test at MVD and apply to TSA at least 60 days before the current STA expires; MVD validates the HME without a second office visitazdot.gov
Legal basis for the background checkU.S. PATRIOT Act § 1012, Safe Explosives Act §§ 1121-1123, A.R.S. § 28-3103(A)(2) and 49 CFR 1572azdot.gov
Class C CDL ruleArizona law requires a Class C CDL to carry either the HME or a passenger endorsementazdot.gov
TSA application formatTSA does not accept handwritten HME applications — apply online or by phoneazdot.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 Arizona

  1. Complete ELDT from a certified provider (required for a first-time H endorsement) and apply for the CDL with HME at an MVD office — new HME applications are processed at any MVD office. Source
  2. Pass the hazardous materials knowledge test — a new test is required of every original and renewal applicant, and the questions come from the Hazardous Materials section of the Arizona CDL manual. The H endorsement can never sit on a commercial learner permit. Source
  3. Only after MVD confirms you passed all required CDL and HME written tests does the TSA Security Threat Assessment begin — MVD hands you a HazMat Background Check Authorization form for the TSA-authorized fingerprint site. Source
  4. Enrol with TSA online or through the HazMat Call Center (TSA does not accept handwritten HME applications) and pay TSA’s fee. Approval can take up to 45 days — TSA itself says one to eight weeks. Source
  5. Finish the road/skills tests. You may take a CDL without the HME in the meantime; because the $10.00 endorsement fee is already paid, exchanging it for the HazMat-endorsed CDL costs nothing extra. Source
  6. Return to an MVD office once the STA approval email arrives so the HME is added to your credential. The STA is good for five years and MVD warns you 60 days before it expires — not before your licence expires. Source

As of September 2, 2026, verified against Arizona Department of Transportation (ADOT), Motor Vehicle Division (MVD).

Arizona CDL questions

What score do I need on the Arizona CDL knowledge test, and where do I take it?
At least 80 percent on each knowledge test. Testing is walk-in at any Arizona MVD office between 7:30 a.m. and 3:00 p.m. — no appointment necessary — and you take all applicable tests during the same visit. If you fail, you wait until the next business day to retake. Source
What does Arizona require for a HazMat (H) endorsement?
ELDT from a certified provider for a first-time H, a CDL application at any MVD office, and the HazMat knowledge test (a new test at every original application and every renewal, drawn from the Hazardous Materials section of the Arizona CDL manual). Only after MVD confirms you passed does the TSA Security Threat Assessment begin — MVD gives you a HazMat Background Check Authorization form for the fingerprint site. MVD charges $10.00 for the endorsement; TSA charges its own fee. Approval may take up to 45 days, the STA lasts five years, and the endorsement can never sit on a learner permit. Source
How old do you have to be to get a CDL in Arizona?
MVD sets the minimum at 18, but a driver under 21 can only hold an intrastate CDL valid inside Arizona and may not transport hazardous materials. Arizona statute (A.R.S. § 28-3153(A)(3)) puts it the other way round: no Class A, B or C licence under 21, except one restricted to intrastate driving from age 18. Source

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