Colorado Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the Colorado Tank Vehicle 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 Drive faster
- B Try to repair the leak yourself
- C Stop in a safe location, isolate the area, and notify the carrier and authorities
- D Continue to the destination
- A Have no effect
- B Improve traction
- C Help you stop sooner
- D Push you forward after you stop
- A Overfill if running low on time
- B Fill the tank completely
- C Leave room for product expansion (outage)
- D Skip the outage if the product is cold
- A A driver shortage
- B The empty space left in a tank for product expansion
- C Equipment failure
- D A tank leak
- A Allow another driver to load for them
- B Begin loading without checking
- C Follow site procedures and verify equipment before loading
- D Skip the site procedures
- A Verify the correct product, quantity, and compatibility with the tank
- B Skip the verification
- C Trust the loader to handle it
- D Allow the receiver to verify later
- A Operates the brakes
- B Improves fuel mileage
- C Reduces engine noise
- D Captures vapors during loading and unloading to reduce emissions
- A Drive away with vents open
- B Skip the post-unload inspection
- C Close vents and covers, secure equipment, and inspect for leaks before leaving
- D Allow the receiver to close everything
- A Smooth and gradual to minimize side-to-side surge
- B At any speed
- C Sharp and quick
- D Without signaling
- A Check fittings and covers for leaks before leaving the loading site
- B Skip the inspection
- C Drive immediately
- D Allow the shipper to drive
- A On straight roads
- B In stopped traffic
- C In low-speed maneuvers
- D On a curve or off-ramp at speeds the driver thought were safe
- A Is a road sign
- B Is for the driver to enter the tank
- C Is part of the brake system
- D Provides access to the tank interior and must be sealed during transport
- A Disregard outage requirements
- B All of the above
- C Drive over the maximum allowable speed for the load
- D Skip a pre-trip inspection
- A Drive faster to limit the spill
- B Continue to the destination
- C Stop, isolate the area, and notify emergency services and the carrier
- D Allow product to leak until empty
- A It is a flatbed
- B It carries any liquid
- C It carries dry cargo
- D It has a tank with rated capacity of 1,000 gallons or more (single tank or aggregate of portable tanks)
- A Easier handling
- B No change in handling
- C Higher rollover risk
- D Faster acceleration
- A Begin unloading immediately
- B Allow the receiver to handle everything
- C Skip the verification
- D Verify the receiver is ready and the receiving tank has capacity
- A At least 5 mph below the posted curve speed when loaded
- B In neutral
- C Above posted speed
- D At posted speed
- A All of the above
- B Cause rollover
- C Cause loss of control
- D Push the vehicle through an intersection
- A Maintain freeway speed
- B Brake within the curve
- C Reduce speed before the ramp and watch for tightening curves
- D Use the parking brake
- A Drive normally
- B Use only the parking brake to slow
- C Disregard surge
- D Allow extra following distance and brake earlier
- A Is illegal in the U.S.
- B Is divided into separate compartments
- C Has no internal structure
- D Has internal walls with holes that slow liquid movement
- A Use the parking brake on grades
- B Take the shortest route regardless of grade
- C Avoid steep grades and sharp curves where possible
- D Avoid all freeways
- A Open vents while pressure is high
- B Drive while unloading
- C Open vents only after pressure is equalized
- D Skip the venting
- A Skip outage
- B All of the above
- C Disregard surge
- D Use the trailer hand valve as a parking brake
Study tips for the Colorado Tank Vehicle exam
The Tank Vehicle 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 Tank Vehicle 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 Tank Vehicle.
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 Tank Vehicle 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 Tank Vehicle 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 General Knowledge · CO Air Brakes · CO Combination Vehicles · CO Hazardous Materials · CO Passenger · CO School Bus · 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.