Colorado General Knowledge CDL Practice Test
Below are 25 exam-style questions for the Colorado General Knowledge CDL knowledge test, modeled on the FMCSA-aligned content used by the Colorado Department of Revenue Division of Motor Vehicles. Try to answer each question on your own before reading the answer key directly under it. The questions and answer choices are shuffled deterministically per state and endorsement, so the order will stay the same on repeat visits — that lets you genuinely measure your improvement.
- A Driving over a speed bump
- B Pumping the brakes
- C Releasing the parking brake on a flat surface and tugging gently against it
- D Setting the parking brake, releasing the service brakes, and gently trying to move the vehicle in low gear
- A Always come to a full stop regardless of traffic
- B Honk and proceed
- C Slow down, look, listen, and be prepared to stop
- D Cross at maximum speed to get over quickly
- A Move to the right lane
- B Cover the brake and slow down
- C Honk and accelerate
- D Maintain speed
- A Perception distance + reaction distance + brake-lag distance + braking distance
- B Brake-lag distance only
- C Speed times weight
- D Reaction distance only
- A Roads in direct sunlight
- B Concrete pavement only
- C Bridges and overpasses
- D Gravel surfaces
- A To improve fuel economy
- B To meet your dispatcher's schedule
- C To reduce tire wear
- D Safety for yourself and other road users
- A It would make you exceed federal hours-of-service rules
- B It would push your weight over legal limits
- C All of the above
- D The cargo is not properly secured or placarded
- A No one
- B The dispatcher only
- C The carrier only
- D The driver, in the form of a logbook or electronic logging device
- A You brake hard on dry pavement
- B Roads are dry but hot
- C Tires lose contact with the road on a film of water
- D Tires are over-inflated
- A On any downgrade
- B Roads are wet, icy, or snow-covered
- C In residential areas only because of noise
- D Driving in dry conditions
- A Pump the brakes hard and fast
- B Disengage the clutch and coast
- C Use a low gear and steady moderate brake application
- D Use the parking brake to slow down
- A Adjusting the trailer brakes individually
- B Walking around the vehicle and checking lights
- C Testing the service and parking brakes
- D Checking the engine compartment
- A Look for an escape ramp
- B Shift into reverse
- C Coast in neutral
- D Use the parking brake hard
- A 4/32 inch
- B 2/32 inch
- C 1/32 inch
- D 6/32 inch
- A Slow down
- B Increase following distance
- C Make smooth steering and braking inputs
- D All of the above
- A Engine oil level is safe to operate
- B Power steering fluid is at the proper level
- C All of the above
- D Coolant level is above LOW and the cap is secure
- A The bridge is closed in winter
- B Bridges are inspected only in winter
- C The pavement under the bridge is reinforced
- D Bridge surfaces freeze first because of air circulation underneath
- A Only at night
- B Only on the highway
- C Whenever you feel like it
- D When you are stopped or moving slowly enough to be a hazard
- A The full range of high-beam headlights when in use
- B The range of your low-beam headlights
- C Whatever speed feels safe
- D Half the range of your low-beam headlights
- A Locking the wheels
- B Coasting in neutral
- C Pumping the brakes hard and fast
- D Applying the brakes as hard as possible without locking the wheels
- A 4 seconds
- B 6 seconds
- C 1 second
- D 10 seconds
- A A traffic violation, but not a CDL disqualification
- B Considered driving under the influence for CDL purposes
- C Allowed if the driver feels fine
- D Allowed off-duty only
- A Required emergency equipment is missing
- B A vehicle is in safe operating condition
- C A trailer brake light is out
- D A passenger door is open
- A The fuel tank area
- B The area in front of the steer axle
- C The area immediately next to it where other drivers are hidden in your blind spots
- D A federal speed restriction
- A A reasonable time, before going off duty
- B 7 days
- C 24 hours
- D 1 hour
Study tips for the Colorado General Knowledge exam
The General Knowledge portion of the Colorado CDL exam is graded out of the bank of questions the Colorado Department of Revenue Division of Motor Vehicles draws from each year. While the exact bank is not published, every question is sourced from the General Knowledge chapter of the Colorado CDL handbook, which itself is derived from the FMCSA Model Commercial Driver's License Manual. That means studying our practice tests, reading the corresponding handbook chapter, and re-reading the parts you got wrong is genuinely the most efficient route to a first-time pass.
Most successful applicants follow a simple cycle: take the practice test cold, write down every question you missed, open the matching chapter of the official Colorado handbook, re-read the section that contains the right answer, then re-take the practice test 24 to 48 hours later. The 24-hour delay matters — sleep is when your brain commits new information to long-term memory, and CDL knowledge questions reward that kind of consolidated learning rather than cramming.
Pay particular attention to questions that include qualifier words like always, never, only, primary, or most. CDL test writers love to flip the right answer with a single qualifier. When two answer choices look almost identical, pay attention to the verb (is it must, should, or may?) and to any numbers (14 days, 100 air miles, 8 hours, 70/8 split). On endorsement tests in particular, watch for trick framing where a true statement about a different endorsement is offered as the "correct" answer to a question that is actually about General Knowledge.
Test-day logistics matter too. Bring photo ID, your Social Security card or birth certificate, your medical examiner's certificate (DOT card), and proof of state residency if you haven't already submitted those documents. The Colorado Department of Revenue Division of Motor Vehicles will not let you sit for the knowledge exam without your documentation, and most offices charge an additional fee for re-attempts. Arrive early — the wait at most CDL testing offices runs 30 to 60 minutes — and silence your phone before the exam begins.
Finally, keep your General Knowledge fundamentals sharp even when you're focused on the General Knowledge exam. Many states administer multiple knowledge tests in a single sitting, and questions on weight definitions (GVWR, GCWR, GAWR), stopping distance, and the pre-trip inspection routine show up across endorsements. If you're unsure on the basics, sit a fresh Colorado General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the General Knowledge study guide and the matching chapter in the official Colorado CDL handbook. Then come back and re-take the test. Once you can score 22 of 25 or higher on three runs in a row, you're in good shape to schedule the real exam at your local Colorado Department of Revenue Division of Motor Vehicles office.
Already comfortable with this endorsement? Drill another: CO Air Brakes · CO Combination Vehicles · CO Hazardous Materials · CO Passenger · CO School Bus · CO Tank Vehicle · CO Doubles / Triples
New to the CDL process in Colorado? Read How to apply for a CDL in Colorado for the document checklist and step-by-step timeline.