Pass Your Colorado CDL Written Test the First Time
DMV-Written-Test helps aspiring commercial drivers in Colorado prepare with up-to-date practice exams based on the 2025 Colorado Commercial Driver License (CDL) Manual. These CDL practice tests simulate the real exam administered by the Colorado Department of Motor Vehicles.
Whether you’re applying for a Class A, B, or C CDL, our practice tests cover all core areas including General Knowledge, Air Brakes, Combination Vehicles, and state-specific trucking laws.
For official CDL manuals, appointment scheduling, and endorsement requirements, visit the Colorado DMV CDL services page: https://www.dmv.colorado.gov/
Start practicing now and earn your CDL permit confidently in Colorado!
📘 What to Expect on the Colorado CDL Knowledge Test
Aspect
Details
Number of Questions
50 (General Knowledge)
Passing Score
80% (40 correct answers required)
Test Format
Multiple Choice
Time Limit
Usually 60 minutes (varies by state)
Minimum Age
18 (in-state); 21 for interstate commerce
Test Languages
English, Spanish (varies)
Endorsement Areas
Air Brakes, Tankers, HazMat, School Bus, etc.
Retake Policy
Next business day (fees may apply)
❓ Frequently Asked Questions
How do I qualify for a CDL permit in Colorado?
You must be at least 18 years old (21 for interstate driving), pass a vision exam, and pass the written General Knowledge test.
Is a training course required before taking the CDL test?
Yes, the FMCSA Entry-Level Driver Training (ELDT) is mandatory before taking the CDL skills test.
How long is a CDL permit valid in Colorado?
Typically 180 days, and it may be renewed once. Contact your local DMV for details.
Can I take the CDL test in Spanish?
General Knowledge may be available in Spanish, but HazMat and certain endorsements must be taken in English.
What happens if I fail the CDL knowledge test?
You may retake the test as soon as the next business day. A retest fee may apply.
Do I need a regular driver’s license to apply?
Yes. A valid Colorado non-commercial driver’s license is required to apply for a CDL permit.
Do I need to take a separate test for endorsements?
Yes. Each CDL endorsement requires its own written test and, in some cases, a skills test.
What is ELDT and who needs it?
Entry-Level Driver Training (ELDT) is federally required for all new CDL applicants and certain endorsement upgrades.
Can I use my out-of-state CDL in Colorado?
You must transfer your out-of-state CDL to Colorado within 30 days of establishing residency.
What documents do I need to apply for a CDL?
You need proof of identity, lawful presence, Colorado residency, and your Social Security number.
