Tennessee Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the Tennessee Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the Tennessee Department of Safety and Homeland Security. 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 Bond and ground before opening the manhole
- B Disconnect the bonding mid-loading
- C Bond only after the loading is complete
- D Skip the bonding if the load is small
- A Disregard surge
- B Use the trailer hand valve as a parking brake
- C Skip outage
- D All of the above
- A All of the above can be a cargo tank
- B Permanently mounted to the vehicle
- C A trailer-mounted tank
- D A portable tank set on the vehicle
- A Slow well below posted speed and watch for surge as you change direction
- B Use the inside lane only
- C Maintain posted speed
- D Honk and proceed
- A Drive normally
- B Use only the parking brake to slow
- C Allow extra following distance and brake earlier
- D Disregard surge
- A A tank leak
- B A driver shortage
- C Equipment failure
- D The empty space left in a tank for product expansion
- A Be ready for surge during stops, starts, and turns
- B Use the trailer hand valve as a parking brake
- C Drive at the posted speed regardless of conditions
- D Skip pre-trip checks of vents and covers
- A Leave brakes off
- B Set only the tractor parking brake
- C Set both tractor and trailer parking brakes and chock if necessary
- D Use the trailer hand valve
- A Help you stop sooner
- B Push you forward after you stop
- C Improve traction
- D Have no effect
- A Allow the receiver to handle everything
- B Stay within reach of the controls and maintain a clear view of the operation
- C Walk away to take a break
- D Stand at least 50 feet away
- A Hold the steering wheel firmly because the load may push you forward
- B Disengage the clutch
- C Release the wheel
- D Apply the parking brake immediately
- A Drive faster
- B Stop in a safe location, isolate the area, and notify the carrier and authorities
- C Try to repair the leak yourself
- D Continue to the destination
- A It is shorter
- B It uses air brakes
- C It is heavier
- D Its high center of gravity and large surface area increase wind effects
- A A pipe that contains residual liquid product
- B An air-brake line
- C A frozen pipe
- D A fuel line
- A It has a tank with rated capacity of 1,000 gallons or more (single tank or aggregate of portable tanks)
- B It carries dry cargo
- C It is a flatbed
- D It carries any liquid
- A Cut between cars
- B Tailgate to keep position
- C Drive at posted speed
- D Maintain extra following distance to allow gentle braking
- A X endorsement (combination of H and N)
- B L restriction
- C H endorsement
- D P endorsement
- A Slow down before the curve, not in it
- B Maintain speed
- C Increase speed
- D Brake within the curve
- A Rely on memory only
- B Wait for the carrier to instruct
- C Open all vents
- D Refer to the ERG and shipping papers for product-specific guidance
- A Allow the receiver to close everything
- B Drive away with vents open
- C Close vents and covers, secure equipment, and inspect for leaks before leaving
- D Skip the post-unload inspection
- A Operates the brakes
- B Captures vapors during loading and unloading to reduce emissions
- C Improves fuel mileage
- D Reduces engine noise
- A Increase speed to clear the descent
- B Use the parking brake harder
- C Look for an escape ramp
- D Coast in neutral
- A Drive while unloading
- B Skip the venting
- C Open vents only after pressure is equalized
- D Open vents while pressure is high
- A Skip the verification
- B Allow the receiver to verify later
- C Verify the correct product, quantity, and compatibility with the tank
- D Trust the loader to handle it
- A All of the above
- B Cause rollover
- C Cause loss of control
- D Push the vehicle through an intersection
Study tips for the Tennessee Tank Vehicle exam
The Tank Vehicle portion of the Tennessee CDL exam is graded out of the bank of questions the Tennessee Department of Safety and Homeland Security draws from each year. While the exact bank is not published, every question is sourced from the Tank Vehicle chapter of the Tennessee 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 Tennessee 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 Tennessee Department of Safety and Homeland Security 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 Tennessee 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 Tennessee 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 Tennessee Department of Safety and Homeland Security office.
Already comfortable with this endorsement? Drill another: TN General Knowledge · TN Air Brakes · TN Combination Vehicles · TN Hazardous Materials · TN Passenger · TN School Bus · TN Doubles / Triples
New to the CDL process in Tennessee? Read How to apply for a CDL in Tennessee for the document checklist and step-by-step timeline.