North Carolina Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the North Carolina Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the North Carolina 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 Stop, isolate the area, and notify emergency services and the carrier
- B Continue to the destination
- C Allow product to leak until empty
- D Drive faster to limit the spill
- A Is divided into separate compartments
- B Has no internal structure
- C Has internal walls with holes that slow liquid movement
- D Is illegal in the U.S.
- A Anywhere outside the cab
- B 100 feet
- C 25 feet of the vehicle
- D 10 feet of the vehicle
- A Increase speed
- B Brake within the curve
- C Slow down before the curve, not in it
- D Maintain speed
- A P endorsement
- B H endorsement
- C X endorsement (combination of H and N)
- D L restriction
- A Stay within reach of the controls and maintain a clear view of the operation
- B Stand at least 50 feet away
- C Walk away to take a break
- D Allow the receiver to handle everything
- A Apply the parking brake immediately
- B Hold the steering wheel firmly because the load may push you forward
- C Disengage the clutch
- D Release the wheel
- A Use only the parking brake
- B Coast in neutral
- C Use stab braking on non-ABS, full pressure on ABS, and be ready for surge
- D Pump rapidly
- A Is the same as smooth-bore
- B Has only one section
- C Has separate sections for different products
- D Has no baffles
- A Drive while unloading
- B Open vents only after pressure is equalized
- C Open vents while pressure is high
- D Skip the venting
- A Refer to the ERG and shipping papers for product-specific guidance
- B Wait for the carrier to instruct
- C Open all vents
- D Rely on memory only
- A Use the parking brake harder
- B Increase speed to clear the descent
- C Look for an escape ramp
- D Coast in neutral
- A Check fittings and covers for leaks before leaving the loading site
- B Drive immediately
- C Allow the shipper to drive
- D Skip the inspection
- A Use the parking brake
- B Brake earlier and more gently than normal
- C Brake harder to make up for traction loss
- D Maintain speed
- A Allow the receiver to handle everything
- B Skip the verification
- C Verify the receiver is ready and the receiving tank has capacity
- D Begin unloading immediately
- A It stops faster
- B There is no effect
- C The vehicle is heavy and stops slower; surge is reduced but mass is high
- D Surge is severe
- A A frozen pipe
- B An air-brake line
- C A pipe that contains residual liquid product
- D A fuel line
- A Provides access to the tank interior and must be sealed during transport
- B Is part of the brake system
- C Is for the driver to enter the tank
- D Is a road sign
- A Empty tanks
- B Baffled tanks
- C Compartmented tanks
- D Smooth-bore (unbaffled) tanks
- A Its high center of gravity and large surface area increase wind effects
- B It is shorter
- C It is heavier
- D It uses air brakes
- A In low-speed maneuvers
- B In stopped traffic
- C On a curve or off-ramp at speeds the driver thought were safe
- D On straight roads
- A Brake within the curve
- B Use the parking brake
- C Reduce speed before the ramp and watch for tightening curves
- D Maintain freeway speed
- A Bond and ground before opening the manhole
- B Bond only after the loading is complete
- C Disconnect the bonding mid-loading
- D Skip the bonding if the load is small
- A GOAL — Get Out And Look — and use a spotter when possible
- B Skip the visual check
- C Back at full speed
- D Use only mirrors
- A Pull over and re-check the load and securement
- B Drive without checking
- C Take a break only
- D Speed up
Study tips for the North Carolina Tank Vehicle exam
The Tank Vehicle portion of the North Carolina CDL exam is graded out of the bank of questions the North Carolina 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 North Carolina 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 North Carolina 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 North Carolina 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 North Carolina 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 North Carolina 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 North Carolina Division of Motor Vehicles office.
Already comfortable with this endorsement? Drill another: NC General Knowledge · NC Air Brakes · NC Combination Vehicles · NC Hazardous Materials · NC Passenger · NC School Bus · NC Doubles / Triples
New to the CDL process in North Carolina? Read How to apply for a CDL in North Carolina for the document checklist and step-by-step timeline.