Arizona Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the Arizona Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the Arizona Department of Transportation MVD. 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 Tailgate to keep position
- B Maintain extra following distance to allow gentle braking
- C Cut between cars
- D Drive at posted speed
- A At posted speed
- B In neutral
- C At least 5 mph below the posted curve speed when loaded
- D Above posted speed
- A Easier handling
- B Higher rollover risk
- C Faster acceleration
- D No change in handling
- A Is whatever feels safe
- B Is above the posted advisory
- C Equals the posted speed limit
- D Is below the posted advisory for cars
- A Push you forward after you stop
- B Improve traction
- C Have no effect
- D Help you stop sooner
- A Allow the receiver to close everything
- B Close vents and covers, secure equipment, and inspect for leaks before leaving
- C Drive away with vents open
- D Skip the post-unload inspection
- A Brake within the curve
- B Reduce speed before the ramp and watch for tightening curves
- C Use the parking brake
- D Maintain freeway speed
- A Stand at least 50 feet away
- B Allow the receiver to handle everything
- C Stay within reach of the controls and maintain a clear view of the operation
- D Walk away to take a break
- A On curves, ramps, and slick surfaces
- B The tank is partially loaded and surge is highest
- C All of the above
- D Stopping or starting in traffic
- A Disregard surge
- B All of the above
- C Skip outage
- D Use the trailer hand valve as a parking brake
- A Skip the venting
- B Open vents only after pressure is equalized
- C Open vents while pressure is high
- D Drive while unloading
- A Prevent corrosion
- B Improve fuel mileage
- C Prevent static-electricity sparks during loading and unloading
- D Reduce noise
- A Use the trailer hand valve as a parking brake
- B Skip pre-trip checks of vents and covers
- C Be ready for surge during stops, starts, and turns
- D Drive at the posted speed regardless of conditions
- A Drive over the maximum allowable speed for the load
- B Disregard outage requirements
- C Skip a pre-trip inspection
- D All of the above
- A Coast in neutral
- B Use stab braking on non-ABS, full pressure on ABS, and be ready for surge
- C Use only the parking brake
- D Pump rapidly
- A Is illegal in the U.S.
- B Has internal walls with holes that slow liquid movement
- C Is divided into separate compartments
- D Has no internal structure
- A Permanently mounted to the vehicle
- B All of the above can be a cargo tank
- C A portable tank set on the vehicle
- D A trailer-mounted tank
- A A pipe that contains residual liquid product
- B A fuel line
- C An air-brake line
- D A frozen pipe
- A Maintain speed
- B Brake earlier and more gently than normal
- C Use the parking brake
- D Brake harder to make up for traction loss
- A Try to repair the leak yourself
- B Stop in a safe location, isolate the area, and notify the carrier and authorities
- C Drive faster
- D Continue to the destination
- A Allow the receiver to add chemicals
- B Mix freely
- C Verify product compatibility and follow safety procedures
- D Skip the safety check
- A Use the escape ramp
- B Increase speed
- C Maintain pressure on the brakes
- D Coast in neutral
- A Allow the shipper to drive
- B Check fittings and covers for leaks before leaving the loading site
- C Skip the inspection
- D Drive immediately
- A Back at full speed
- B GOAL — Get Out And Look — and use a spotter when possible
- C Skip the visual check
- D Use only mirrors
- A Coast in neutral
- B Look for an escape ramp
- C Increase speed to clear the descent
- D Use the parking brake harder
Study tips for the Arizona Tank Vehicle exam
The Tank Vehicle portion of the Arizona CDL exam is graded out of the bank of questions the Arizona Department of Transportation MVD draws from each year. While the exact bank is not published, every question is sourced from the Tank Vehicle chapter of the Arizona 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 Arizona 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 Arizona Department of Transportation MVD 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 Arizona 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 Arizona 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 Arizona Department of Transportation MVD office.
Already comfortable with this endorsement? Drill another: AZ General Knowledge · AZ Air Brakes · AZ Combination Vehicles · AZ Hazardous Materials · AZ Passenger · AZ School Bus · AZ Doubles / Triples
New to the CDL process in Arizona? Read How to apply for a CDL in Arizona for the document checklist and step-by-step timeline.