Maryland Tank Vehicle CDL Practice Test
Below are 25 exam-style questions for the Maryland Tank Vehicle CDL knowledge test, modeled on the FMCSA-aligned content used by the Maryland Motor Vehicle Administration. 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 Cause loss of control
- B Cause rollover
- C All of the above
- D Push the vehicle through an intersection
- A Skip the safety check
- B Allow the receiver to add chemicals
- C Verify product compatibility and follow safety procedures
- D Mix freely
- A Avoid all freeways
- B Take the shortest route regardless of grade
- C Avoid steep grades and sharp curves where possible
- D Use the parking brake on grades
- A Pump rapidly
- B Coast in neutral
- C Use only the parking brake
- D Use stab braking on non-ABS, full pressure on ABS, and be ready for surge
- 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 Set only the tractor parking brake
- B Set both tractor and trailer parking brakes and chock if necessary
- C Leave brakes off
- D Use the trailer hand valve
- A At least 5 mph below the posted curve speed when loaded
- B Above posted speed
- C At posted speed
- D In neutral
- A Skip the post-unload inspection
- B Allow the receiver to close everything
- C Drive away with vents open
- D Close vents and covers, secure equipment, and inspect for leaks before leaving
- A Fill the tank completely
- B Leave room for product expansion (outage)
- C Overfill if running low on time
- D Skip the outage if the product is cold
- A Continue to the destination
- B Drive faster to limit the spill
- C Stop, isolate the area, and notify emergency services and the carrier
- D Allow product to leak until empty
- A On a curve or off-ramp at speeds the driver thought were safe
- B In low-speed maneuvers
- C In stopped traffic
- D On straight roads
- A Allow the receiver to handle everything
- B Skip the verification
- C Begin unloading immediately
- D Verify the receiver is ready and the receiving tank has capacity
- A A pipe that contains residual liquid product
- B An air-brake line
- C A fuel line
- D A frozen pipe
- A Brake harder to make up for traction loss
- B Brake earlier and more gently than normal
- C Use the parking brake
- D Maintain speed
- A Has the same surge
- B Has no surge
- C Has less surge than a full tank
- D Has more surge than a full or empty tank
- A Smooth and gradual to minimize side-to-side surge
- B Without signaling
- C At any speed
- D Sharp and quick
- A Stop in a safe location, isolate the area, and notify the carrier and authorities
- B Try to repair the leak yourself
- C Drive faster
- D Continue to the destination
- A It is a flatbed
- B It carries dry cargo
- C It carries any liquid
- D It has a tank with rated capacity of 1,000 gallons or more (single tank or aggregate of portable tanks)
- A Skip the brake check
- B Be especially careful with starts and stops because surge will be severe
- C Use only the parking brake
- D Drive normally
- A Disregard outage requirements
- B Skip a pre-trip inspection
- C All of the above
- D Drive over the maximum allowable speed for the load
- A Allow the shipper to drive
- B Skip the inspection
- C Check fittings and covers for leaks before leaving the loading site
- D Drive immediately
- A Has separate sections for different products
- B Has only one section
- C Is the same as smooth-bore
- D Has no baffles
- A All of the above can be a cargo tank
- B A trailer-mounted tank
- C A portable tank set on the vehicle
- D Permanently mounted to the vehicle
- A Its high center of gravity and large surface area increase wind effects
- B It is shorter
- C It uses air brakes
- D It is heavier
- A Use the parking brake
- B Brake within the curve
- C Reduce speed before the ramp and watch for tightening curves
- D Maintain freeway speed
Study tips for the Maryland Tank Vehicle exam
The Tank Vehicle portion of the Maryland CDL exam is graded out of the bank of questions the Maryland Motor Vehicle Administration draws from each year. While the exact bank is not published, every question is sourced from the Tank Vehicle chapter of the Maryland 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 Maryland 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 Maryland Motor Vehicle Administration 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 Maryland 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 Maryland 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 Maryland Motor Vehicle Administration office.
Already comfortable with this endorsement? Drill another: MD General Knowledge · MD Air Brakes · MD Combination Vehicles · MD Hazardous Materials · MD Passenger · MD School Bus · MD Doubles / Triples
New to the CDL process in Maryland? Read How to apply for a CDL in Maryland for the document checklist and step-by-step timeline.