Colorado
Colorado CDL Practice Tests - All Endorsements

Driving cattle across Colorado is different these days, and if you want to haul beef across The Centennial State, it's crucial to have a Colorado commercial driver's license. We have examples for every test and every endorsement, including passenger and school busses, doubles/triples, tank vehicles, hazardous materials, or air brake restriction removal. So, roll up your sleeves and get ready to get Rocky Mountain high.

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CO commercial driver's license

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You need to pass these knowledge exams at the DMV. Practice each one below.
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    HazMat, Tanker, and other add-ons your employer may require
    General Knowledge
    663 questions
    CO CDL Diagnostic Test
    15 questions
    General Knowledge Test 1
    20 questions
    General Knowledge Test 2
    50 questions
    General Knowledge Test 3
    50 questions
    General Knowledge Test 4
    50 questions
    General Knowledge Test 5
    50 questions
    General Knowledge Test 6
    50 questions
    General Knowledge Test 7
    50 questions
    General Knowledge Test 8
    50 questions
    General Knowledge Test 9
    50 questions
    General Knowledge Test 10
    50 questions
    General Knowledge Test 11
    50 questions
    General Knowledge Test 12
    50 questions
    General Knowledge Test 13
    93 questions
    General Knowledge Marathon
    All 693 questions
    General Knowledge Exam Simulator
    50 random questions
    General Knowledge Cheat Sheet
    Class A/B ELDT Video Course
    Video Audio PDF
    Basic Operations
    • Orientation
    • Control Systems and Dashboards
    • Pre- and Post-Trip Inspection
    • Basic Operations
    • Shifting and Transmissions
    • Backing and Docking
    Safe Operating Practices
    • Visual search
    • Communication
    • Distraction
    • Speed management
    • Space management
    • Night operation
    • Extreme conditions
    Advanced Operating Procedures
    • Hazard Perception
    • Skid Control
    • Railroad-Highway Grade Crossing
    Vehicle Systems
    • Identification and diagnosis of malfunctions
    • Roadside inspections
    • Maintenance
    Non-Driving Operations
    • Handling and documenting cargo
    • Environmental compliance
    • Hours of Service
    • Fatigue and wellness awareness
    • Post-crash procedures
     
    • External communication
    • Whistleblower and coercion
    • Trip planning
    • Drugs and alcohol
    • Medical requirements
    Watch demo part
    Video Audio PDF
    Pre-Trip Inspection
    91 questions
    Pre-Trip Inspection Test 1
    20 questions
    Pre-Trip Inspection Test 2
    20 questions
    Pre-Trip Inspection Test 3
    20 questions
    Pre-Trip Inspection Test 4
    31 questions
    Pre-Trip Inspection Marathon
    All 91 questions
    Pre-Trip Inspection Exam Simulator
    20 random questions
    Pre-Trip Inspection Cheat Sheet
    Pre-Trip Inspection Video by Apex CDL Institute
    01m 05s
    How to perform a CDL Class A Pre-Trip Inspection
    22m 40s
    Pre-Trip Inspection Video
    by CDL College
    31m 58s
    Full Exterior and in Cab PTI by West Georgia Tech College
    16m 13s
    Air Brake Tests for Combination Vehicles
    05m 22s
    The Challenge Bank™
    Your missed questions

    Your personalized Challenge Bank™ automatically retests you on all your missed questions until you nail every single one. No shame - we all have weaknesses!

    The Challenge Bank™
     

    Your personalized Challenge Bank™ automatically retests you on all your missed questions until you nail every single one. No shame - we all have weaknesses!

    Start Challenge Bank™
    The CO CDL Handbook
    Handbook

    Read or listen to this interactive handbook designed for minimum boredom and maximum engagement. Download to study anywhere, anytime.

    CO CDL Handbook

    Not your typical read — this interactive handbook is designed for engagement. Study anytime, anywhere: read, listen, chat with it or download for offline access.

    Read
    PDF (156 pages)
    Listen
    MP3 (8h 22m)
    Download
    9 MB
    Open Handbook
    FREE E-Book

    Many people arrive at the DMV overconfident and underprepared because they fail to do some of the simple things that would allow them to pass easily. What follows are the 10 steps that every aspiring commefcial driver should take to prepare for his or her official CDL or CLP knowledge exam.

    10 Things You Should Do Before Your CDL Knowledge Exam

    Many people arrive at the DMV overconfident and underprepared because they fail to do some of the simple things that would allow them to pass easily. What follows are the 10 steps that every aspiring commefcial driver should take to prepare for his or her official CDL or CLP knowledge exam.

    Open E-Book
    Not available in Flashcard Mode
    Steven Litvintchouk, M.S., Chief Educational Researcher at Driving-Tests.org

    Reviewed for legal and handbook accuracy

    Steven Litvintchouk

    M.S., Chief Educational Researcher (ACES member)

    Last verified for accuracy on

    Andrei Zakhareuski, Co-founder & CEO, Driving-Tests.org

    Test design and learning experience oversight

    Andrei Zakhareuski

    Co-founder & CEO, Driving-Tests.org

    Questions are created and maintained by the Driving-Tests.org content team following our multi-layer editorial process and updated whenever the Colorado DMV changes its handbook or website information. Official sources we check: