South Dakota Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the South Dakota Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the South Dakota Driver Licensing Program. 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 Verify the receiver is ready and the receiving tank has capacity
- B Skip the verification
- C Begin unloading immediately
- D Allow the receiver to handle everything
- A Cause loss of control
- B All of the above
- C Cause rollover
- D Push the vehicle through an intersection
- A Brake earlier and more gently than normal
- B Use the parking brake
- C Brake harder to make up for traction loss
- D Maintain speed
- A Allow extra following distance and brake earlier
- B Disregard surge
- C Use only the parking brake to slow
- D Drive normally
- A Tailgate to keep position
- B Cut between cars
- C Drive at posted speed
- D Maintain extra following distance to allow gentle braking
- 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 Drive normally
- B Skip the brake check
- C Be especially careful with starts and stops because surge will be severe
- D Use only the parking brake
- A Improve traction
- B Push you forward after you stop
- C Have no effect
- D Help you stop sooner
- A GOAL — Get Out And Look — and use a spotter when possible
- B Use only mirrors
- C Skip the visual check
- D Back at full speed
- A Reduce noise
- B Prevent static-electricity sparks during loading and unloading
- C Improve fuel mileage
- D Prevent corrosion
- A Is the same as smooth-bore
- B Has only one section
- C Has separate sections for different products
- D Has no baffles
- A The tank shell for corrosion or damage
- B All of the above
- C Manhole covers and vents
- D Special pump and valve systems
- A 100 feet
- B 25 feet of the vehicle
- C 10 feet of the vehicle
- D Anywhere outside the cab
- A Is whatever feels safe
- B Equals the posted speed limit
- C Is below the posted advisory for cars
- D Is above the posted advisory
- A Allow product to leak until empty
- B Drive faster to limit the spill
- C Continue to the destination
- D Stop, isolate the area, and notify emergency services and the carrier
- A Has no internal structure
- B Is divided into separate compartments
- C Is illegal in the U.S.
- D Has internal walls with holes that slow liquid movement
- A H endorsement
- B X endorsement (combination of H and N)
- C P endorsement
- D L restriction
- A Smooth-bore (unbaffled) tanks
- B Baffled tanks
- C Empty tanks
- D Compartmented tanks
- A Provides access to the tank interior and must be sealed during transport
- B Is a road sign
- C Is for the driver to enter the tank
- D Is part of the brake system
- A Reduces engine noise
- B Operates the brakes
- C Captures vapors during loading and unloading to reduce emissions
- D Improves fuel mileage
- A Avoid steep grades and sharp curves where possible
- B Take the shortest route regardless of grade
- C Avoid all freeways
- D Use the parking brake on grades
- A Skip the verification
- B Trust the loader to handle it
- C Allow the receiver to verify later
- D Verify the correct product, quantity, and compatibility with the tank
- A Skip outage
- B Use the trailer hand valve as a parking brake
- C Disregard surge
- D All of the above
- A In low-speed maneuvers
- B On a curve or off-ramp at speeds the driver thought were safe
- C On straight roads
- D In stopped traffic
- A Leave brakes off
- B Set only the tractor parking brake
- C Use the trailer hand valve
- D Set both tractor and trailer parking brakes and chock if necessary
Study tips for the South Dakota Tank Vehicle exam
The Tank Vehicle portion of the South Dakota CDL exam is graded out of the bank of questions the South Dakota Driver Licensing Program draws from each year. While the exact bank is not published, every question is sourced from the Tank Vehicle chapter of the South Dakota 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 South Dakota 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 South Dakota Driver Licensing Program 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 South Dakota 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 South Dakota 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 South Dakota Driver Licensing Program office.
Already comfortable with this endorsement? Drill another: SD General Knowledge · SD Air Brakes · SD Combination Vehicles · SD Hazardous Materials · SD Passenger · SD School Bus · SD Doubles / Triples
New to the CDL process in South Dakota? Read How to apply for a CDL in South Dakota for the document checklist and step-by-step timeline.