Free CDL Hazmat Practice Test Online

Official exam: CDL Hazardous Materials Endorsement

Take a free CDL Hazmat practice test online: a full 50-question paper with every answer explained, no sign-up, scored by topic. The full 111-question bank and the timed simulator are $14.99 for 30 days.

First published: September 2, 2026Bank updated: September 2, 2026Published by CertQuestUSA · review process

TL;DR

CDL Hazardous Materials Endorsement: a 111-question practice bank for the real CDL Permit & Endorsement Exams standard, 2 full papers of 50 questions each with no repeats, every question written to the regulation it comes from.

Where these questions come from

Every question in this bank cites a source -- primarily 49 CFR (100%) of this exam's citations.

Take a full practice test free. 50 real questions built to the exam's domain weights, every answer explained, no sign-up required, with a domain-by-domain score at the end.

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2

full papers, no repeats

50

questions per paper

111

questions in the bank

What this exam covers

Driver Responsibilities & Security9%
Emergency Response & Communication6%
Hazardous Materials Table9%
Labeling9%
Loading, Unloading & Segregation11%
Marking9%
Packaging9%
Placarding13%
Route Restrictions & Tunnels8%
Shipping Papers11%
Cargo Tank Marking6%

5 real sample questions

For a shipment of hazardous waste, the shipping paper retention period is extended to how long after acceptance by the initial carrier?

A. 375 days

B. 1 year

C. 3 years

D. 5 years

Show answer and reasoning

Correct answer: C. 3 years

A: 375 days is the retention period for hazardous materials generally, not hazardous waste specifically.
B: 1 year understates the hazardous-waste retention period.
D: 5 years overstates the hazardous-waste retention period.

Source: 49 CFR 172.201

A shipment of a hazardous substance in a quantity that equals or exceeds its reportable quantity (RQ) must show what additional notation on the shipping paper description?

A. "HOT" before the shipping name

B. The letters "RQ"

C. The word "URGENT"

D. A red diagonal stripe symbol

Show answer and reasoning

Correct answer: B. The letters "RQ"

A: There is no "HOT" shipping-paper notation required by this section.
C: There is no "URGENT" notation required by this section.
D: A striped placard border is a different regulatory concept and is not a shipping-paper notation.

Source: 49 CFR 172.203

When a shipper offers a hazardous material for transportation, who must receive and retain a copy of the shipper's certification required by § 172.204?

A. Only the consignee

B. Only the initial carrier

C. Any carrier in the chain of custody

D. No one; certification is not retained

Show answer and reasoning

Correct answer: B. Only the initial carrier

A: The certification is retained by the initial carrier, not the consignee.
C: The retention obligation for the certification runs to the initial carrier, not every subsequent carrier.
D: A signed shipper certification is a required, retained document, not something discarded.

Source: 49 CFR 172.204

Column 6 of the § 172.101 table lists which required element for each hazardous material entry?

A. Emergency response telephone number

B. Label codes

C. Cargo tank specification number

D. Segregation group letter

Show answer and reasoning

Correct answer: B. Label codes

A: The emergency response telephone number is a Subpart G requirement (172.604), not Column 6 of the table.
C: Cargo tank specification numbers come from Part 178/180, not Column 6 of the § 172.101 table.
D: Segregation groups are addressed in Part 177, not listed as a Column 6 table entry.

Source: 49 CFR 172.101

A cargo tank built of quenched and tempered steel must be marked near the specification plate with which letters?

A. "QT"

B. "NQT"

C. "HT"

D. "CT"

Show answer and reasoning

Correct answer: A. "QT"

B: "NQT" is the marking for tanks built of steel other than quenched and tempered.
C: "HT" is not the marking specified by this section.
D: "CT" is not the marking specified by this section.

Source: 49 CFR 172.328

Real-world data for this exam

Heavy and Tractor-Trailer Truck Drivers: real median wageMay 2025$58,640/yr Hazardous Materials Compliancesince 2023-01-0129,960 violations Part of the real CDL Driver career pathExplore ›

Frequently asked questions

Where can I take a free CDL Hazmat practice test online?

Right here. CertQuestUSA's free CDL Hazmat practice test online is a full 50-question practice paper built to the real exam's domain weights, with every answer explained, with no sign-up and no credit card, and shows your score by topic at the end. The full 111-question bank, with every answer explained and cited to the regulation it comes from, is $14.99 for a 30-day pass that never renews.

How many questions are on the CertQuestUSA CDL Hazardous Materials Endorsement practice test?

111 questions total, split into 2 full papers of 50 each with no repeats across papers.

What topics does the CDL Hazardous Materials Endorsement test cover?

11 domains, with the heaviest weight on Placarding (13%), Loading, Unloading & Segregation (11%), and Shipping Papers (11%).

Where do CertQuestUSA's CDL Hazardous Materials Endorsement questions come from?

Primarily 49 CFR (100%) of this bank's citations -- computed directly from this exam's own question sources, not a generic description.

Is there a free CDL Hazardous Materials Endorsement practice test?

Yes -- one full 50-question practice paper built to the exam's domain weights, free with no sign-up, with every answer explained and a domain-by-domain score at the end.

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