Hawaii General Knowledge CDL Practice Test
Below are 25 exam-style questions for the Hawaii General Knowledge 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 Use low-beam headlights and slow down
- B Drive faster to get out of the fog quickly
- C Use the four-ways while in motion at highway speed
- D Use high-beam headlights for maximum visibility
- A It can let poisonous carbon monoxide into the cab
- B It is illegal
- C It causes the engine to overheat
- D It increases fuel use
- A Gross Vehicle Weight Rating
- B Government Vehicle Weight Regulation
- C General Vehicle Weight Reading
- D Gross Vehicle Width Rating
- A Use a low gear and steady moderate brake application
- B Disengage the clutch and coast
- C Pump the brakes hard and fast
- D Use the parking brake to slow down
- A 40,000 lbs or more
- B 10,001 lbs or more
- C 26,001 lbs or more
- D 20,000 lbs or more
- A Bridge surfaces freeze first because of air circulation underneath
- B The pavement under the bridge is reinforced
- C The bridge is closed in winter
- D Bridges are inspected only in winter
- A Releasing the parking brake on a flat surface and tugging gently against it
- B Pumping the brakes
- C Driving over a speed bump
- D Setting the parking brake, releasing the service brakes, and gently trying to move the vehicle in low gear
- A Signal only when other vehicles are present
- B Use the four-way flashers instead of signals at intersections
- C Signal only at the moment you start turning
- D Signal early, signal continuously, and cancel after the turn
- A 14 hours
- B 11 hours
- C 16 hours
- D 10 hours
- A Drum brakes never need adjustment
- B Brakes self-adjust forever
- C Brake adjustment is the dispatcher's responsibility
- D Slack adjusters need periodic checking; pushrod travel beyond limits is out-of-service
- A Three reflective triangles: 10 ft, 100 ft, and 200 ft toward approaching traffic
- B One reflective triangle within 10 feet
- C A flare burning constantly
- D A spotter walking 1,000 ft up the road
- A On vehicles without ABS, to keep them straight in an emergency
- B To save fuel
- C On wet roads only
- D On vehicles with ABS
- A Back to the right whenever possible
- B Use a helper and walk around the vehicle first
- C Back fast to get it over with
- D Back without using mirrors so you can watch out the window
- A When you are stopped or moving slowly enough to be a hazard
- B Only at night
- C Whenever you feel like it
- D Only on the highway
- A Never communicate; just drive
- B Tap the horn lightly or flash lights to signal your presence
- C Honk loudly to warn other drivers
- D Make eye contact only when stopped
- A It cools the brakes too much
- B It wastes brake pads
- C It triggers the ABS warning light
- D Brake fade can leave you with reduced or no braking power
- A 1 hour
- B 7 days
- C 24 hours
- D A reasonable time, before going off duty
- A All of the above
- B Increase following distance
- C Make smooth steering and braking inputs
- D Slow down
- A A federal speed restriction
- B The area in front of the steer axle
- C The fuel tank area
- D The area immediately next to it where other drivers are hidden in your blind spots
- A Tires are over-inflated
- B Tires lose contact with the road on a film of water
- C Roads are dry but hot
- D You brake hard on dry pavement
- A Perception distance + reaction distance + brake-lag distance + braking distance
- B Brake-lag distance only
- C Reaction distance only
- D Speed times weight
- A Honk and proceed
- B Slow down, look, listen, and be prepared to stop
- C Cross at maximum speed to get over quickly
- D Always come to a full stop regardless of traffic
- A 4 seconds
- B 6 seconds
- C 10 seconds
- D 1 second
- A A fuel-saving switch
- B A trailer hitch component
- C A type of cargo strap
- D A low-air pressure warning device that drops a flag in front of the driver
- A All of the above
- B It would push your weight over legal limits
- C The cargo is not properly secured or placarded
- D It would make you exceed federal hours-of-service rules
Study tips for the Hawaii General Knowledge exam
The General Knowledge 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 General Knowledge 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 General Knowledge.
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 General Knowledge 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 General Knowledge 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 Air Brakes · HI Combination Vehicles · HI Hazardous Materials · HI Passenger · HI School Bus · HI Tank Vehicle · HI Doubles / Triples
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.