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Kansas General Knowledge CDL Practice Test

Below are 25 exam-style questions for the Kansas General Knowledge CDL knowledge test, modeled on the FMCSA-aligned content used by the Kansas Department of Revenue Division of 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.

Heads up: this is a study tool, not a graded exam. Cover the answer with your hand or a sheet of paper for an honest practice run, then re-read the explanations for any questions you missed. Aim for 22 out of 25 or better, three times in a row, before scheduling the real exam.
Question 1 of 25
Black ice is most likely on:
  • A Gravel surfaces
  • B Concrete pavement only
  • C Bridges and overpasses
  • D Roads in direct sunlight
Correct answer: C
Bridges and overpasses freeze first because cold air circulates above and below them. They are the most-asked test scenario for sudden ice.
Question 2 of 25
Hours-of-service records are required to be kept by:
  • A The driver, in the form of a logbook or electronic logging device
  • B No one
  • C The dispatcher only
  • D The carrier only
Correct answer: A
Drivers are responsible for accurate hours-of-service records, kept either on paper logs or, for most carriers, on an ELD.
Question 3 of 25
You may not drive a CMV with a blood-alcohol concentration of:
  • A 0.10% or higher
  • B Any detectable amount above 0.00%
  • C 0.08% or higher
  • D 0.04% or higher
Correct answer: D
0.04% is the regulatory limit for CMV operation. A detectable amount under that triggers an out-of-service order but is not necessarily a DUI conviction.
Question 4 of 25
What does GVWR stand for?
  • A General Vehicle Weight Reading
  • B Gross Vehicle Weight Rating
  • C Gross Vehicle Width Rating
  • D Government Vehicle Weight Regulation
Correct answer: B
GVWR is the maximum weight the manufacturer says a single vehicle can safely weigh, including itself plus its load.
Question 5 of 25
Which is required when stopping on the side of a level, straight, two-lane road?
  • A A flare burning constantly
  • B One reflective triangle within 10 feet
  • C A spotter walking 1,000 ft up the road
  • D Three reflective triangles: 10 ft, 100 ft, and 200 ft toward approaching traffic
Correct answer: D
On a level straight road, place triangles 10 feet behind the vehicle, 100 feet, and 200 feet to the rear in the direction of approaching traffic.
Question 6 of 25
When should you use four-way flashers?
  • A Whenever you feel like it
  • B Only on the highway
  • C Only at night
  • D When you are stopped or moving slowly enough to be a hazard
Correct answer: D
Four-ways are for vehicles stopped on or near the road or moving so slowly that they are a hazard.
Question 7 of 25
You are driving a heavy vehicle and have to stop on a long downgrade. Which is the safest way?
  • A Disengage the clutch and coast
  • B Use a low gear and steady moderate brake application
  • C Use the parking brake to slow down
  • D Pump the brakes hard and fast
Correct answer: B
On a long downgrade, select a low gear before the descent and use steady, light to moderate braking. Hard pumping or coasting in neutral leads to brake fade and loss of control.
Question 8 of 25
A leaking exhaust system is dangerous because:
  • A It increases fuel use
  • B It causes the engine to overheat
  • C It can let poisonous carbon monoxide into the cab
  • D It is illegal
Correct answer: C
Carbon monoxide from a leaking exhaust can cause headaches, drowsiness, and unconsciousness. The illegality is real but the safety risk is the bigger answer.
Question 9 of 25
A driver must report any accident involving a CMV to the carrier within:
  • A 7 days
  • B A reasonable time, before going off duty
  • C 1 hour
  • D 24 hours
Correct answer: B
FMCSA rules require notification of the motor carrier in a reasonable time — most policies treat that as before going off duty.
Question 10 of 25
Which of the following is NOT part of a pre-trip inspection?
  • A Checking the engine compartment
  • B Testing the service and parking brakes
  • C Walking around the vehicle and checking lights
  • D Adjusting the trailer brakes individually
Correct answer: D
Adjusting brakes is a maintenance task done by qualified personnel, not a pre-trip step. The driver checks for proper operation, not adjustment.
Question 11 of 25
Drivers may not drive after being on duty:
  • A 15 hours of driving
  • B 8 hours in any 24-hour period
  • C 20 hours in a 24-hour period
  • D 14 consecutive hours since coming on duty
Correct answer: D
The 14-hour rule limits the on-duty window during which up to 11 hours of driving may occur.
Question 12 of 25
A driver who refuses to take a required drug or alcohol test is treated as if they:
  • A Need to take it again later
  • B Took the test and passed
  • C Took the test and failed
  • D Did not take the test, with no consequence
Correct answer: C
Refusal is a federal CDL disqualification with the same consequences as a positive test.
Question 13 of 25
A driver who has lost the ability to safely brake the vehicle on a downgrade should:
  • A Shift into reverse
  • B Use the parking brake hard
  • C Look for an escape ramp
  • D Coast in neutral
Correct answer: C
Long downgrades have escape ramps for runaway trucks. Use them. Coasting in neutral is illegal in many states and worsens the problem.
Question 14 of 25
Skids are most often caused by:
  • A Properly working brakes
  • B Old tires
  • C Manual transmissions
  • D Driving too fast for conditions
Correct answer: D
The dominant cause of skids identified by the FMCSA is driving too fast for the road or weather. Sudden steering, hard braking, or hard acceleration usually triggers them.
Question 15 of 25
Which is true about driving in rain?
  • A Tire chains are required by federal law
  • B It is safe to drive at the posted speed limit
  • C High beams improve visibility in heavy rain
  • D Roads are most slippery just after rain begins, when water mixes with road oil
Correct answer: D
The first few minutes of rain mix with oil and grime on the road and create the slipperiest conditions. Slow down and increase following distance.
Question 16 of 25
A driver convicted of a major offense (DUI, leaving the scene, etc.) in a CMV faces:
  • A A warning
  • B No federal consequence
  • C A fine only
  • D CDL disqualification for at least one year for a first offense
Correct answer: D
Major offenses carry a one-year CDL disqualification minimum (three years if hauling hazardous materials), and lifetime for a second.
Question 17 of 25
When approaching a steep downgrade, the basic safe-driving rule is:
  • A Coast in neutral
  • B Use the parking brake intermittently
  • C Stay in high gear
  • D Select a lower gear before starting down
Correct answer: D
Get into a low gear before the descent so the engine helps hold the vehicle back.
Question 18 of 25
The proper following distance for a 60-foot truck traveling under 40 mph is at least:
  • A 10 seconds
  • B 6 seconds
  • C 1 second
  • D 4 seconds
Correct answer: B
Use one second per 10 feet of vehicle length below 40 mph: 60 ft / 10 = 6 seconds. Add one additional second above 40 mph.
Question 19 of 25
A Class C CDL is required to drive:
  • A Vehicles designed to carry 16+ passengers including the driver, or that require hazmat placards
  • B Tractor-trailers under 26,001 lbs GCWR
  • C Class A combinations only
  • D Any vehicle over 26,001 lbs
Correct answer: A
Class C covers vehicles that don't meet Class A or B but are designed to carry 16 or more passengers (including the driver) or carry placarded amounts of hazardous materials.
Question 20 of 25
Which is true about brake lining wear and adjustment?
  • A Drum brakes never need adjustment
  • B Brakes self-adjust forever
  • C Slack adjusters need periodic checking; pushrod travel beyond limits is out-of-service
  • D Brake adjustment is the dispatcher's responsibility
Correct answer: C
Slack adjusters can fail, and pushrod travel must be within limits. Drivers check; adjustment itself is a maintenance task for qualified personnel.
Question 21 of 25
To recover from a front-wheel skid, you should:
  • A Steer sharply in the opposite direction
  • B Release the brake, let the wheels turn freely, and let the vehicle slow down
  • C Brake hard immediately
  • D Accelerate
Correct answer: B
A front-wheel skid is usually caused by braking too hard. Release the brake to allow the front tires to grip again so steering returns.
Question 22 of 25
Which is true about driving in fog?
  • A Use low-beam headlights and slow down
  • B Use high-beam headlights for maximum visibility
  • C Drive faster to get out of the fog quickly
  • D Use the four-ways while in motion at highway speed
Correct answer: A
High beams reflect off fog and reduce visibility. Slow down and use low beams or fog lamps if equipped.
Question 23 of 25
The proper response to a tire blowout on the front axle is to:
  • A Shift to neutral and coast
  • B Hold the steering wheel firmly, ease off the accelerator, and let the vehicle slow down
  • C Steer sharply toward the shoulder
  • D Brake immediately and pull off the road
Correct answer: B
Hard braking after a blowout can cause loss of control. Hold the wheel, release the accelerator, and let speed bleed off before braking gently.
Question 24 of 25
Which of the following is a sign of fatigue?
  • A All of the above
  • B Trouble remembering the last few miles
  • C Drifting in your lane
  • D Frequent yawning
Correct answer: A
All three are classic fatigue indicators in the FMCSA model. Cold air, music, and caffeine are not effective fixes — only sleep is.
Question 25 of 25
Engine retarders (Jake brakes) should be turned off when:
  • A Driving in dry conditions
  • B On any downgrade
  • C In residential areas only because of noise
  • D Roads are wet, icy, or snow-covered
Correct answer: D
Retarders can cause drive-wheel skids on slippery surfaces. Turn them off when traction is reduced.

Study tips for the Kansas General Knowledge exam

The General Knowledge portion of the Kansas CDL exam is graded out of the bank of questions the Kansas Department of Revenue Division of Vehicles draws from each year. While the exact bank is not published, every question is sourced from the General Knowledge chapter of the Kansas 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 Kansas 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 Kansas Department of Revenue Division of 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 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 Kansas 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 Kansas 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 Kansas Department of Revenue Division of Vehicles office.

Already comfortable with this endorsement? Drill another: KS Air Brakes · KS Combination Vehicles · KS Hazardous Materials · KS Passenger · KS School Bus · KS Tank Vehicle · KS Doubles / Triples

New to the CDL process in Kansas? Read How to apply for a CDL in Kansas for the document checklist and step-by-step timeline.