Virginia Doubles / Triples CDL Practice Test
Below are 25 exam-style questions for the Virginia Doubles / Triples CDL knowledge test, modeled on the FMCSA-aligned content used by the Virginia Department 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 Random order
- B Disconnect tractor first
- C Reverse of coupling — disconnect rear trailer first, then dolly
- D No specific order
- A Air lines, electrical lines, and connection points
- B Fuel tanks
- C Drivers
- D Engines
- A Prevents accidental release of the hook
- B Is the same as a fifth wheel jaw
- C Is electrical
- D Is decorative
- A All of the above
- B Potential rollover at curves
- C Lane changes that swing the rear
- D Crosswind effects on the rear trailer
- A Skip the air-leak rate check
- B All of the above
- C Skip the parking-brake test
- D Skip the brake-light test
- A Connect a semitrailer to another trailer to form a combination
- B Replace the fifth wheel on the tractor
- C Move cargo within the trailer
- D Test the brakes
- A Steer sharply to correct
- B Reduce speed gradually and avoid sudden steering inputs
- C Accelerate
- D Brake hard
- A Fewer inspection points
- B No effect on safety
- C Better handling
- D More opportunities for tire failure and more inspection points
- A Reduce speed gradually and avoid sudden steering inputs
- B Brake hard
- C Steer sharply to correct
- D Accelerate
- A On all U.S. highways
- B In Canada only
- C In some states; restrictions vary
- D Only on Interstate 80
- A Federal and state rules vary; T endorsement does not override route restrictions
- B T endorsement allows triples everywhere
- C There are no restrictions
- D Restrictions apply only to hazmat
- A Rear trailer can swing out and cause loss of control
- B Tractor cannot jackknife
- C Speed is reduced faster
- D Brakes work better
- A Lane changes
- B Cargo placement
- C Wind, especially crosswinds and from passing trucks
- D All of the above
- A First (closest to the tractor)
- B In the middle
- C Last (furthest from the tractor)
- D It does not matter
- A Has the same rollover risk
- B Cannot roll
- C Is less likely to roll
- D Is more likely to roll than the first
- A Allow the dolly to roll freely
- B Couple without verifying
- C Skip the air check
- D Verify the dolly's air tank has air pressure and lock the dolly's parking brake before backing under the second trailer
- A A driver punishing the truck
- B A tire blowout
- C A loose load shifting
- D The rear trailer swinging more than the tractor in turns or lane changes
- A Verify the fifth wheel locks around the kingpin and test by tugging gently
- B Skip the lock verification
- C Trust visual inspection only
- D Couple at high speed
- A Skip the floor inspection
- B Allow damage
- C Inspect once a year
- D Look for damage that could affect cargo securement or trailer integrity
- A The left lane
- B The shoulder
- C Any lane
- D The right lane on multilane highways when possible
- A Have a passenger guide you
- B Use only mirrors
- C Avoid it; if necessary, uncouple to a single trailer first
- D Back at full speed
- A Carry electrical signals
- B Provide a backup connection in case the primary coupling fails
- C Are decorative
- D Are required only on triples
- A Change quickly to fit in
- B Skip the signal
- C Plan the change well in advance, signal early, and change when there is ample space
- D Cut between cars
- A A type of car carrier
- B A combination with a second trailer that has a kingpin attached to the first trailer
- C A train carrying buses
- D A type of bus
- A Leave brakes off
- B Use the trailer hand valve
- C Set parking brakes on the tractor and on the trailers
- D Set only the tractor parking brake
Study tips for the Virginia Doubles / Triples exam
The Doubles / Triples portion of the Virginia CDL exam is graded out of the bank of questions the Virginia Department of Motor Vehicles draws from each year. While the exact bank is not published, every question is sourced from the Doubles / Triples chapter of the Virginia 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 Virginia 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 Doubles / Triples.
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 Virginia Department 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 Doubles / Triples 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 Virginia General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the Doubles / Triples study guide and the matching chapter in the official Virginia 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 Virginia Department of Motor Vehicles office.
Already comfortable with this endorsement? Drill another: VA General Knowledge · VA Air Brakes · VA Combination Vehicles · VA Hazardous Materials · VA Passenger · VA School Bus · VA Tank Vehicle
New to the CDL process in Virginia? Read How to apply for a CDL in Virginia for the document checklist and step-by-step timeline.