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. Privacy Policy: https://www.voltexam.com/privacy Terms of Service: https://www.voltexam.com/terms Apple EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Ratings & Reviews

  • 4.1
    out of 5
    9 Ratings

Major update packed with new tools and improvements. New: Hazmat Class Guide with visual color diamonds, divisions, and exam tips for all 9 DOT hazmat classes. New: Speed Round, a 60-second timed drill to sharpen your recall under pressure. New: Annual Plan at $24.99 per year, best value for CDL candidates in training. New: 3-Day Free Trial, try everything Pro free with no commitment. New: Smarter onboarding shows you exactly what is inside before you start. Improved: Cleaner adaptive UI that follows your system light and dark settings. Better Flashcards, ERG Lookup, and Placard Builder, all polished and faster. Questions covering Hazmat, Tanker, and Combination Vehicle. Good luck on your exam. You have got this.

Version 2.2

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.

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    Information

    Seller
    • Deeun Inc.
    Size
    • 6.2 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.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Monthly Access $9.99
    • CDL Hazmat Prep - Lifetime Pro $49.99
    • Annual Access $24.99
    • Learn More
    Copyright
    • © VoltExam 2026
  • Developer Website
  • Privacy Policy

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