🚛 California CDL Hazmat Endorsement
California CDL Hazmat Endorsement — Exam Prep 2026
Prepare for the California DMV CDL Hazmat knowledge test with 1,000+ practice questions covering FMCSA regulations, CA-specific hazmat routing restrictions, placard rules, and security plans. Free to start.
Free to download · No credit card · iPhone & iPad
California CDL Hazmat Test
Administered by California DMV
30
Questions
80%
Passing Score
~$38
Endorsement Fee
7 days
Retake Wait
California CDL Hazmat Endorsement — What to Expect
In California, the CDL Hazmat (H) endorsement is administered by the California Department of Motor Vehicles (DMV). You take the knowledge test at a DMV field office and can schedule an appointment at dmv.ca.gov. Bring your current CDL and TSA Security Threat Assessment approval.
The California CDL Hazmat test has 30 questions and requires a minimum 80% passing score (24 correct). California is stricter than most states on retakes — there is a 7-day waiting period between failed attempts (most states allow 24 hours).
California has some of the most stringent hazmat routing restrictions in the country. Certain routes — including tunnels in the Bay Area and specific urban corridors in Los Angeles — restrict or prohibit certain hazmat categories. Drivers are responsible for knowing these restrictions. Some carriers also need a California Hazardous Materials Transportation Permit (CTHMP) from Cal OES for specified high-hazard shipments.
The California CDL Hazmat knowledge test itself covers the same federal FMCSA regulations (49 CFR) tested in all 50 states, so the VoltExam app prepares you for every question on the California exam.
What the App Covers
App Features
California-Specific: Stricter Hazmat Rules
7-day retake wait: Unlike most states (24 hours), California requires a full 7 days between failed knowledge test attempts. Schedule your test only when you are consistently scoring 85%+ in practice.
Routing restrictions: California enforces hazmat routing restrictions beyond the federal minimum. Drivers are responsible for knowing restricted routes, particularly in the Bay Area (certain tunnels) and Los Angeles.
CTHMP permit: Some carriers transporting specified quantities of certain high-hazard materials (explosives, radioactive, etc.) through California need a California Hazardous Materials Transportation Permit (CTHMP) from Cal OES — in addition to the federal CDL hazmat endorsement.
5 Free California CDL Hazmat Practice Questions
No account required. These questions reflect the types of questions on the California DMV CDL Hazmat knowledge test.
Q1.A CDL driver is transporting a Class 1.4 explosive. Under FMCSA regulations, when is a EXPLOSIVES 1.4 placard required?
Q2.California has stricter hazmat routing restrictions than federal minimums. Under California regulations, who is responsible for ensuring a hazmat vehicle uses approved routes?
Q3.What is the California Hazardous Materials Transportation Permit (CTHMP) required for?
Q4.How many questions is the California DMV CDL Hazmat knowledge test, and what score is required to pass?
Q5.Under 49 CFR, a hazmat shipping paper must be kept where while the vehicle is moving?
Study Smarter for the California CDL Hazmat Test
The VoltExam CDL Hazmat app covers every topic the California DMV tests — from hazmat classes and placard thresholds to security plans and driver responsibilities. California requires 85%+ practice accuracy before your real test (7-day retake wait means you cannot afford to go in underprepared).
Free Trial
$0
First 20 questions per topic, no time limit, no credit card
Monthly
$9.99/mo
Full access. Cancel anytime. Billed monthly through App Store.
Lifetime
$49.99
Pay once, own forever. Best value if your exam is within 3 months.
Free to download · No credit card required
California CDL Hazmat — Frequently Asked Questions
How many questions is the California CDL hazmat knowledge test?
The California DMV CDL Hazmat endorsement knowledge test has 30 questions. You must answer at least 24 correctly — an 80% passing score — to pass. The test is administered at California DMV field offices. Unlike most states, California requires a 7-day waiting period before you can retake the test if you fail.
Where do I take the California CDL hazmat test?
The California CDL Hazmat knowledge test is administered at California DMV field offices. You can schedule a knowledge test appointment online at dmv.ca.gov. Bring your current CDL and your TSA Security Threat Assessment approval. Some commercial driver training schools may also be authorized testing locations.
How much does the California CDL hazmat endorsement cost?
The California CDL Hazmat endorsement fee is approximately $38, paid to the California DMV. This is higher than most other states. You also pay separately for the TSA Security Threat Assessment background check ($86.50 federal fee at an enrollment center). If you fail and retake, the $38 fee applies each time.
Does California have additional hazmat regulations beyond federal FMCSA rules?
Yes. California has stricter hazmat routing restrictions than federal minimums — certain hazmat categories are restricted from specific routes and tunnels (particularly in the Bay Area and Los Angeles). Additionally, carriers transporting specified quantities of certain high-hazard materials may need a California Hazardous Materials Transportation Permit (CTHMP) issued by Cal OES. The CDL Hazmat knowledge test itself, however, covers the same federal FMCSA regulations tested in all 50 states.
How long does the California hazmat endorsement last?
The California CDL Hazmat endorsement is valid for the same period as your California CDL — typically 5 years. At each renewal, you must pass the Hazmat knowledge test again and complete a new TSA Security Threat Assessment. Plan ahead: the TSA background check takes 2–4 weeks, and California requires a 7-day wait between failed test attempts. Schedule early.
Studying in a Different State?
See the main CDL Hazmat prep page — covers all 50 states