Montana Doubles / Triples CDL Practice Test
Below are 25 exam-style questions for the Montana Doubles / Triples CDL knowledge test, modeled on the FMCSA-aligned content used by the Montana Motor Vehicle Division. 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 No specific order
- B Disconnect tractor first
- C Reverse of coupling — disconnect rear trailer first, then dolly
- D Random order
- A Is the same as a fifth wheel jaw
- B Is electrical
- C Prevents accidental release of the hook
- D Is decorative
- A Brakes are uneven
- B Only the rear trailer brakes
- C All trailers should brake together if the system is functioning correctly
- D Only the first trailer brakes
- A Wind, especially crosswinds and from passing trucks
- B All of the above
- C Cargo placement
- D Lane changes
- A Replace the fifth wheel on the tractor
- B Move cargo within the trailer
- C Connect a semitrailer to another trailer to form a combination
- D Test the brakes
- A Brake hard
- B Accelerate
- C Reduce speed gradually and avoid sudden steering inputs
- D Steer sharply to correct
- A There are no restrictions
- B Federal and state rules vary; T endorsement does not override route restrictions
- C T endorsement allows triples everywhere
- D Restrictions apply only to hazmat
- A Off-tracking is more pronounced; swing wider than for a single trailer
- B Off-tracking is less than a single trailer
- C Use the left lane
- D No off-tracking occurs
- A Total length and weight increase stopping distance and require more reaction time
- B It accelerates faster
- C It is shorter
- D It uses different brakes
- A Skip the floor inspection
- B Allow damage
- C Look for damage that could affect cargo securement or trailer integrity
- D Inspect once a year
- A Allow loose engagement
- B Allow chains to drag
- C Verify it is properly engaged and safety chains are attached
- D Skip the safety chains
- A A converter dolly
- B A trailer for transporting animals
- C A tractor only
- D A short trailer commonly used in doubles and triples
- A Skip the spotter
- B Avoid backing whenever possible; use a spotter when needed
- C Use only mirrors
- D Back at full speed
- A Use only mirrors
- B Avoid it; if necessary, uncouple to a single trailer first
- C Back at full speed
- D Have a passenger guide you
- A Better fuel mileage
- B It is harder to roll over
- C No change in handling
- D It can sway and lift more easily; drive carefully
- A Only at the destination
- B Once a year
- C Before pulling away from the coupling site
- D Never; the dispatcher tests them
- A Engines
- B Fuel tanks
- C Air lines, electrical lines, and connection points
- D Drivers
- A Connect it to a random trailer
- B Leave it on a slope
- C Park it on level ground with the parking brake set or wheels chocked
- D Disable the brakes
- A Increased rollover risk in curves
- B Reduced visibility around the second trailer
- C Crosswind sensitivity
- D All of the above
- A Coupling and uncoupling procedures
- B All of the above
- C How to inspect each connection point
- D State and federal route restrictions
- A All air lines and electrical lines should be connected and tested
- B Some lines may be optional
- C Skip the testing
- D Test only one line
- A Skip the inspection
- B Allow them to drag
- C Tie them in knots
- D Verify they are crossed under the pintle hook and not dragging
- A Rear trailer can swing out and cause loss of control
- B Speed is reduced faster
- C Tractor cannot jackknife
- D Brakes work better
- A Skip the air-brake check
- B All of the above
- C Back without a spotter when possible
- D Drive faster than conditions allow
- A Nothing happens
- B The tractor brakes apply
- C The second trailer's emergency brakes apply automatically
- D The first trailer accelerates
Study tips for the Montana Doubles / Triples exam
The Doubles / Triples portion of the Montana CDL exam is graded out of the bank of questions the Montana Motor Vehicle Division draws from each year. While the exact bank is not published, every question is sourced from the Doubles / Triples chapter of the Montana 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 Montana 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 Montana Motor Vehicle Division 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 Montana 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 Montana 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 Montana Motor Vehicle Division office.
Already comfortable with this endorsement? Drill another: MT General Knowledge · MT Air Brakes · MT Combination Vehicles · MT Hazardous Materials · MT Passenger · MT School Bus · MT Tank Vehicle
New to the CDL process in Montana? Read How to apply for a CDL in Montana for the document checklist and step-by-step timeline.