Wyoming Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the Wyoming Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the Wyoming Department of Transportation. 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 Rely on memory only
- B Wait for the carrier to instruct
- C Refer to the ERG and shipping papers for product-specific guidance
- D Open all vents
- A Use the parking brake
- B Maintain speed
- C Brake earlier and more gently than normal
- D Brake harder to make up for traction loss
- A Avoid all freeways
- B Avoid steep grades and sharp curves where possible
- C Use the parking brake on grades
- D Take the shortest route regardless of grade
- A Continue to the destination
- B Drive faster to limit the spill
- C Allow product to leak until empty
- D Stop, isolate the area, and notify emergency services and the carrier
- A Use stab braking on non-ABS, full pressure on ABS, and be ready for surge
- B Coast in neutral
- C Pump rapidly
- D Use only the parking brake
- A Maintain pressure on the brakes
- B Coast in neutral
- C Increase speed
- D Use the escape ramp
- A Sharp and quick
- B Without signaling
- C Smooth and gradual to minimize side-to-side surge
- D At any speed
- A Trust the loader to handle it
- B Allow the receiver to verify later
- C Verify the correct product, quantity, and compatibility with the tank
- D Skip the verification
- A A tank leak
- B A driver shortage
- C The empty space left in a tank for product expansion
- D Equipment failure
- A Follow site procedures and verify equipment before loading
- B Allow another driver to load for them
- C Begin loading without checking
- D Skip the site procedures
- A Pump and unloading equipment
- B Vents and valves
- C All of the above
- D Tank shell and covers
- A It stops faster
- B Surge is severe
- C There is no effect
- D The vehicle is heavy and stops slower; surge is reduced but mass is high
- A Pull over and re-check the load and securement
- B Speed up
- C Take a break only
- D Drive without checking
- A Improve fuel mileage
- B Reduce noise
- C Prevent static-electricity sparks during loading and unloading
- D Prevent corrosion
- A Allow the shipper to drive
- B Check fittings and covers for leaks before leaving the loading site
- C Drive immediately
- D Skip the inspection
- A Operates the brakes
- B Reduces engine noise
- C Captures vapors during loading and unloading to reduce emissions
- D Improves fuel mileage
- A Baffled tanks
- B Empty tanks
- C Compartmented tanks
- D Smooth-bore (unbaffled) tanks
- A Has the same surge
- B Has less surge than a full tank
- C Has more surge than a full or empty tank
- D Has no surge
- A Open vents while pressure is high
- B Drive while unloading
- C Open vents only after pressure is equalized
- D Skip the venting
- A All of the above can be a cargo tank
- B A portable tank set on the vehicle
- C Permanently mounted to the vehicle
- D A trailer-mounted tank
- A Equals the posted speed limit
- B Is whatever feels safe
- C Is below the posted advisory for cars
- D Is above the posted advisory
- A It carries any liquid
- B It has a tank with rated capacity of 1,000 gallons or more (single tank or aggregate of portable tanks)
- C It carries dry cargo
- D It is a flatbed
- A Help you stop sooner
- B Improve traction
- C Have no effect
- D Push you forward after you stop
- A Is illegal in the U.S.
- B Has no internal structure
- C Is divided into separate compartments
- D Has internal walls with holes that slow liquid movement
- 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
Study tips for the Wyoming Tank Vehicle exam
The Tank Vehicle portion of the Wyoming CDL exam is graded out of the bank of questions the Wyoming Department of Transportation draws from each year. While the exact bank is not published, every question is sourced from the Tank Vehicle chapter of the Wyoming 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 Wyoming 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 Wyoming Department of Transportation 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 Wyoming 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 Wyoming 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 Wyoming Department of Transportation office.
Already comfortable with this endorsement? Drill another: WY General Knowledge · WY Air Brakes · WY Combination Vehicles · WY Hazardous Materials · WY Passenger · WY School Bus · WY Doubles / Triples
New to the CDL process in Wyoming? Read How to apply for a CDL in Wyoming for the document checklist and step-by-step timeline.