CDL Hazmat Exam Prep
Pass H Endorsement — DOT Tools
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
DOT Placard Guide + Hazmat Class Guide + ERG Reference + 5 Exam Simulator Modes. 1,000+ questions based on 49 CFR. Pass your CDL hazmat endorsement.
CDL HAZMAT PREP: PASS YOUR HAZMAT ENDORSEMENT EXAM FIRST TRY
The CDL hazmat endorsement exam covers all 9 hazard classes, placarding rules, loading procedures, and emergency response. You need 80 percent to pass. This app gives you 1,000+ practice questions based directly on 49 CFR Parts 171 through 180 — the same federal regulations FMCSA tests you on.
DOT PLACARD GUIDE
All 9 hazard classes with divisions, threshold quantities, and special provisions. Class 1 Explosives through Class 9 Miscellaneous with every division, placard color, and UN number format explained. This is the reference material you will use on the exam and on the road.
HAZMAT CLASS GUIDE
Visual reference for all 9 DOT hazmat classes with color diamonds, divisions, and exam tips. Covers every class and division that appears on the endorsement exam.
EXAM SIMULATOR
Five exam modes: Hazmat General Knowledge, Hazmat Operations, Emergency Response, Tanker Endorsement, and Full H/N/X Combo. 30 questions, 80 percent pass threshold, timed, with per-category scoring showing exactly where you are strong and where you need work.
EMERGENCY RESPONSE GUIDE
Based on ERG procedures: incident response steps, CHEMTREC contact (800-424-9300), isolation distances for major hazard classes, fire response protocols, and driver responsibilities at the scene.
HAZMAT MATH TOOLS
Placard weight threshold calculator, tank capacity and outage calculator, safe following distance calculator, and DOT fine estimator. Real tools you will use after the exam too.
FLASHCARD DECKS
Hazard Classes, Placarding Rules, Shipping Papers, Loading and Segregation, Emergency Response, and Tanker Operations. Study at the terminal, in the sleeper, or at the truck stop. Works 100 percent offline. No signal needed.
SMART PRACTICE
The app tracks which categories you are struggling with and serves those questions more often. No wasting time on topics you have already mastered.
Every question includes a detailed explanation tied to the specific CFR section so you understand the rule, not just the answer.
PASS PROMISE: Complete all questions with 80% or higher average, hold active subscription for 3 months, still do not pass. We extend your access by 4 months at no charge. voltexam.com/pass-promise
PRO: Unlimited questions, all exam simulator modes, every flashcard deck, every math tool, full ERG reference, smart practice, Pass Promise coverage. 3-day free trial included.
A hazmat endorsement means higher pay per mile. This app costs less than a single fuel stop. Pass your CDL Hazmat endorsement the first time.
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Ratings & Reviews
Studying for your CDL Hazmat endorsement? We've made it easier to see
everything Pro unlocks — and to start your 3-day free trial:
• 510+ practice questions mapped to 49 CFR Part 172
• ERG quick lookup for any UN/NA number when you're on the road
• Placard Builder + DOT Fine Calculator for real-world use
• 30-question timed mock exam in the same format as the DMV test
• Smart practice that targets the topics where you're weakest
Plus a cleaner upgrade screen with a refreshed shield-and-diamond
design so the value is obvious at a glance.
Pass the endorsement. Stay compliant on the job. Drive on.
The developer, Deeun Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Deeun Inc.
- Size
- 6.3 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Monthly Access $9.99
- CDL Hazmat Prep - Lifetime Pro $49.99
- Annual Access $24.99
- Copyright
- © Deeun Inc.