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CDL Hazmat Endorsement practice test

This free CDL hazardous materials endorsement practice test covers the knowledge test you take on top of your CDL, with original questions written from the federal knowledge requirements in 49 CFR Part 383.

  • Multiple-choice knowledge test
  • 80% to pass (49 CFR 383.135)
  • item count set by your state
Start 20 free questions What’s inside
  • No signup to start
  • Every answer includes a source note
  • Updated October 22, 2026

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Driving & Licenses · Exam prep

CDL Hazmat Endorsement practice test: how the exam works and how to prepare

Original practice questions on the hazardous materials endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions. The real CDL Hazmat Endorsement test at a glance: Multiple-choice knowledge test, 80% to pass (49 CFR 383.135), item count set by your state. Use these free CDL Hazmat Endorsement practice questions to learn the format and read the explanation and source note behind every answer.

80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

  • Learn the hazardous materials topics in the order your state manual teaches them
  • Use the free 20 first, then work the full bank by topic and retest what you missed
  • Read every explanation, including why the wrong options fail
  • Check your state's CDL manual for local numbers and rules before test day
Official format

The real test at a glance

What it takes to pass the CDL Hazmat Endorsement test

80% to pass · question count set by your state

Quick Summary: The official CDL Hazmat Endorsement knowledge test requires a minimum passing score of 80%. Format: Multiple-choice knowledge test. Sourced directly from official state testing blueprints.
  • Multiple-choice knowledge test
  • 80% to pass (49 CFR 383.135)
  • item count set by your state

80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

150
practice questions
20
free, no signup
80%
published threshold
50
questions per simulation

Topic coverage

Topics covered in this bank

150 original questions mapped to the listed source topics. Bars show how many questions each topic gets.

Original practice questions on the hazardous materials endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions.

View full topic blueprint & drills →

Drill down by official testing module:

Loading segregation22Shipping papers20Placarding20Emergencies notification20Driving parking routes18Marking labeling16

From the question bank

Try 3 more real questions

Answer in your head, then check. Every explanation cites the official source.

  1. Q1Hazmat basics

    Where are the Hazardous Materials Regulations found?

    1. AIn parts 1 to 50 of title 40 of the Code of Federal Regulations
    2. BIn parts 171 to 180 of title 49 of the Code of Federal Regulations
    3. CIn parts 380 to 399 of title 49 of the Code of Federal Regulations
    4. DIn the state motor vehicle code of each state
    Show answer

    B. In parts 171 to 180 of title 49 of the Code of Federal Regulations The common reference for these regulations is 49 CFR 171 to 180. Parts 1 to 50 of title 40 deal with other subject matter, parts 380 to 399 of title 49 cover motor carrier safety, and state codes do not hold these federal rules, so look in 49 CFR 171 to 180 for the hazmat regulations.

  2. Q2Hazmat basics

    What do you need before driving any size vehicle used to transport hazardous material as defined in 49 CFR 383.5?

    1. AA CDL with a tank vehicle endorsement on it
    2. BA CDL with a hazardous materials endorsement
    3. CA CDL with a passenger endorsement on it
    4. DA state hazardous materials permit only
    Show answer

    B. A CDL with a hazardous materials endorsement To get the endorsement you must pass a written test about the regulations and requirements. A tank vehicle or passenger endorsement covers different hazards, and a state permit alone is not the federal requirement, so a CDL with the hazardous materials endorsement is needed whatever the vehicle size.

  3. Q3Hazard classes

    How many different hazard classes does the manual describe?

    1. AFive
    2. BNine
    3. CTwelve
    4. DTwenty
    Show answer

    B. Nine The nine classes are shown in Figure 9.1, with divisions in some classes. Five, twelve and twenty are not the number of classes, since the manual describes nine hazard classes, and some of them are divided into divisions for more specific hazards.

All 20 free questions with answers Take them as a timed quiz

Study plan

How to pass the CDL Hazmat Endorsement

The order that works: learn the rules, drill until they’re automatic, then use the exam simulator to check consistency.

  1. 1

    Learn the hazardous materials topics in the order your state manual teaches them

  2. 2

    Use the free 20 first, then work the full bank by topic and retest what you missed

  3. 3

    Read every explanation, including why the wrong options fail

  4. 4

    Check your state's CDL manual for local numbers and rules before test day

Exam simulator

Sit a timed mock test for the Hazmat

One question at a time against a real countdown, no feedback until you submit, flag questions to come back to, then a score against the pass mark with a by-topic breakdown and every answer explained. Topics are mixed across the whole bank, and a retake is a new draw.

Try the free mock test

The free mock test runs 20 questions from the free set, once. Unlocking adds full-length runs of 50 questions from the whole bank. A practice mock test, not an official replica.

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20 q
Full run
50 q
Practice clock
50 min
Pass mark
80%

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  • All 150 questions, every topic
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80% is the federal threshold in 49 CFR 383.135. The regulation sets the percentage only — your state driver licensing agency sets how many questions the test has.

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Everything free for the CDL Hazmat Endorsement test

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About these questions

Written by QuizCram from the official source and verified against its text — never copied from a real exam. Original practice questions on the hazardous materials endorsement, written from the federal knowledge requirements in 49 CFR Part 383 and the public CDL manual facts; not official state test questions.

Questions last updated
October 22, 2026
Bank version
v1 · 150 questions

Good to know

CDL Hazmat Endorsement FAQ

Federal rules set the 80% passing threshold but not a question count. Each state writes its own test, so confirm the number with your state agency.

No. These are original practice questions on the hazardous materials endorsement. Your state licensing agency writes and scores the real test, and its CDL manual is the final word on local rules.

Yes. Open the exam simulator and sit a timed mock test of 20 questions built from the free questions, once, with no signup. Unlocking the exam adds full-length runs of 50 questions in 50 minutes (a practice clock), as many as you like, each a new draw from the whole bank.

The exam's agency publishes no topic weights, so it mixes topics in proportion to the question bank, favouring questions you missed before and never repeating one within a run. A retake is a new draw, so you will meet different questions. It is a practice mock test, not an official replica of the real exam.

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