Hawaii Doubles / Triples CDL Practice Test
Below are 25 exam-style questions for the Hawaii Doubles / Triples CDL knowledge test, modeled on the FMCSA-aligned content used by the Hawaii Department of Transportation. 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 Avoid restricted roads and minimize sharp curves and steep grades
- B Avoid freeways
- C Drive only at night
- D Take the shortest route regardless
- A In the middle
- B Last (furthest from the tractor)
- C It does not matter
- D First (closest to the tractor)
- A Skip the brake-light test
- B All of the above
- C Skip the parking-brake test
- D Skip the air-leak rate check
- A Random order
- B Disconnect tractor first
- C No specific order
- D Reverse of coupling — disconnect rear trailer first, then dolly
- A Two tractors pulling one trailer
- B A trailer with two axles
- C Two trailers behind one tractor
- D A bus with two sections
- A Use the spare
- B Replace before operating
- C Ignore the damage
- D Continue with damaged tires
- A Use the trailer hand valve as a parking brake
- B Skip the pre-trip
- C Drive as if it were a single trailer
- D Be aware of the increased complexity of the equipment and operate accordingly
- A A trailer for transporting animals
- B A short trailer commonly used in doubles and triples
- C A converter dolly
- D A tractor only
- A Handling and braking are affected
- B Better fuel mileage
- C No effect
- D Better handling
- A The second trailer's emergency brakes apply automatically
- B The first trailer accelerates
- C Nothing happens
- D The tractor brakes apply
- A Brake hard
- B Accelerate
- C Reduce speed gradually and avoid sudden steering inputs
- D Steer sharply to correct
- A Are required only on triples
- B Carry electrical signals
- C Provide a backup connection in case the primary coupling fails
- D Are decorative
- A Couple at high speed
- B Skip the lock verification
- C Verify the fifth wheel locks around the kingpin and test by tugging gently
- D Trust visual inspection only
- A The right lane on multilane highways when possible
- B Any lane
- C The left lane
- D The shoulder
- A Allow the dolly to roll freely
- B Skip the air check
- C Couple without verifying
- D Verify the dolly's air tank has air pressure and lock the dolly's parking brake before backing under the second trailer
- A Lane changes that swing the rear
- B All of the above
- C Crosswind effects on the rear trailer
- D Potential rollover at curves
- A More opportunities for tire failure and more inspection points
- B Fewer inspection points
- C Better handling
- D No effect on safety
- A The converter dolly
- B The rear trailer
- C The tractor
- D The first trailer
- A Off-tracking is less than a single trailer
- B Use the left lane
- C No off-tracking occurs
- D Off-tracking is more pronounced; swing wider than for a single trailer
- A Brake hard
- B Accelerate
- C Reduce speed gradually and avoid sudden steering inputs
- D Steer sharply
- A Allow loose engagement
- B Skip the safety chains
- C Allow chains to drag
- D Verify it is properly engaged and safety chains are attached
- A Back at full speed
- B Avoid it; if necessary, uncouple to a single trailer first
- C Have a passenger guide you
- D Use only mirrors
- A Use the trailer hand valve
- B Set parking brakes on the tractor and on the trailers
- C Set only the tractor parking brake
- D Leave brakes off
- A Change quickly without signaling
- B Change in heavy traffic
- C Signal early and change smoothly to minimize swing
- D Change at high speed
- A Move cargo within the trailer
- B Connect a semitrailer to another trailer to form a combination
- C Test the brakes
- D Replace the fifth wheel on the tractor
Study tips for the Hawaii Doubles / Triples exam
The Doubles / Triples portion of the Hawaii CDL exam is graded out of the bank of questions the Hawaii Department of Transportation draws from each year. While the exact bank is not published, every question is sourced from the Doubles / Triples chapter of the Hawaii 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 Hawaii 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 Hawaii Department of Transportation 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 Hawaii 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 Hawaii 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 Hawaii Department of Transportation office.
Already comfortable with this endorsement? Drill another: HI General Knowledge · HI Air Brakes · HI Combination Vehicles · HI Hazardous Materials · HI Passenger · HI School Bus · HI Tank Vehicle
New to the CDL process in Hawaii? Read How to apply for a CDL in Hawaii for the document checklist and step-by-step timeline.