Rhode Island Combination Vehicles CDL Practice Test
Below are 25 exam-style questions for the Rhode Island Combination Vehicles CDL knowledge test, modeled on the FMCSA-aligned content used by the Rhode Island 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 Be loose
- B Be missing
- C Be closed around the shank of the kingpin (not on the head)
- D Be open
- A The brakes are released gently
- B You are driving slowly
- C The trailer wheels lock briefly
- D The drive wheels lock and the trailer pushes the tractor sideways
- A Use only mirrors
- B Back at full speed
- C GOAL — Get Out And Look — and walk around the trailer first
- D Have the dispatcher in the cab
- A Disable the trailer parking brake
- B Check that the trailer is stable on its landing gear
- C Connect the lines back to the tractor
- D Move the tractor far away immediately without checking
- A No specific order is required
- B Pull tractor away first, then disconnect lines
- C Lower landing gear, disconnect lines, release fifth wheel, pull tractor away
- D Release fifth wheel first, then connect lines
- A It is illegal in some states
- B It is fine if you are careful
- C It is the standard procedure
- D It can damage the cab and the trailer (cab corner crush)
- A Spin out
- B Roll over before sliding
- C Stop suddenly
- D Lose engine power
- A Is part of the tractor
- B Is used only when triple-towing
- C Replaces the fifth wheel on the tractor
- D Is used to convert a semitrailer into a full trailer for towing in combination
- A Tug the trailer with the trailer parking brakes set
- B Honk the horn
- C Listen for a click
- D Look at the locking jaws only
- A Wheel damage
- B Brake fade
- C Off-tracking — the trailer wheels follow a tighter arc than the tractor
- D No off-tracking
- A Are caused by low fuel
- B Show up only at high speed
- C Can be detected during pre-trip inspection by visual and pressure checks
- D Need a mechanic to find
- A Be in the stowed (high) position when traveling
- B Be removed
- C Be locked at half-height
- D Be in the low position when traveling
- A A height that requires the tractor to drop down to fit
- B A height where the tractor will lift the trailer slightly when backing under
- C Maximum legal height
- D Whatever height it happens to be
- A Tire wear only
- B The trailer to come uncoupled
- C Rust on the cab
- D Engine damage
- A Hydraulic fluid
- B Air for the brakes
- C Fuel
- D Electrical power for trailer lights and ABS
- A Cargo placement
- B The fuel mileage
- C The trailer following the same path as the tractor in a straight line
- D Lane positioning at intersections
- A Both tractor and trailer brakes simultaneously
- B The trailer service brakes only
- C The tractor service brakes only
- D The parking brake
- A Charge the trailer brakes by setting the trailer air supply control
- B Pump the brakes 10 times
- C Drive away immediately
- D Drain the wet tank
- A Coupling devices for connecting tractor air lines to the trailer
- B Manual transmission shifters
- C Electrical connectors
- D Brake adjustment levers
- A Raise the gear partway
- B Lower the landing gear all the way until firmly on the ground, then a few extra cranks
- C Use blocks instead
- D Leave the gear up
- A Honk the horn
- B Disconnect the electrical line first
- C Drain the air tanks
- D Lower the trailer landing gear and chock the trailer wheels
- A Apply trailer brakes momentarily
- B Test the trailer brakes
- C Hold the vehicle when parking
- D Both for parking and to prevent jackknife
- A Loss of traction
- B Driving off the road
- C Sliding sideways
- D The trailer wheels follow a tighter arc than the tractor wheels in a turn
- A Air leakage in the supply line, low pressure, or a brake-balance issue
- B Engine wear
- C Driver fatigue
- D Cargo placement
- A Stopping distances increase and the trailer can swing
- B Steering becomes easier
- C No effect on safety
- D Stopping distances are normal
Study tips for the Rhode Island Combination Vehicles exam
The Combination Vehicles portion of the Rhode Island CDL exam is graded out of the bank of questions the Rhode Island Division of Motor Vehicles draws from each year. While the exact bank is not published, every question is sourced from the Combination Vehicles chapter of the Rhode Island 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 Rhode Island 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 Combination Vehicles.
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 Rhode Island 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 Combination Vehicles 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 Rhode Island General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the Combination Vehicles study guide and the matching chapter in the official Rhode Island 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 Rhode Island Division of Motor Vehicles office.
Already comfortable with this endorsement? Drill another: RI General Knowledge · RI Air Brakes · RI Hazardous Materials · RI Passenger · RI School Bus · RI Tank Vehicle · RI Doubles / Triples
New to the CDL process in Rhode Island? Read How to apply for a CDL in Rhode Island for the document checklist and step-by-step timeline.