Kentucky CDL Class B Practice Test (KY) 3

4.8 out of 5 (78 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up for your Class B CDL in Kentucky? Look no further! Our Kentucky CDL Class B Practice Test is here to guide you through the nuances of truck driving without the high stakes of a real test in 2026. Picture this: you're calmly answering questions, getting immediate feedback, all in the comfort of your chosen environment. That's the reality with our online KY general knowledge practice test. This third installment in our CDL series is tailor-made for aspiring Class B drivers. It encompasses a comprehensive set of 20 questions, mirroring the actual DMV CDL written test. To pass, you'll need to correctly answer at least 16 questions. But here's the good news: mistakes are part of the learning process. Each error is a chance to learn, not a step back. Our Kentucky CDL class B practice test covers everything from the basics of vehicle control and pre-trip inspection to the specifics of shifting gears and handling steep downgrades. Expect to delve into practical scenarios, including communication with fellow drivers and speed control. We also emphasize the importance of drug and alcohol awareness - crucial for safe driving. The questions on our Kentucky CDL practice test have been crafted and scrutinized by seasoned driving instructors. These professionals have dedicated their careers to driver education, helping thousands earn their licenses. Their expertise ensures that each permit test question not only challenges but educates. Moreover, our Kentucky class B practice tests are accessible anytime, anywhere. Whether you're on a desktop at home or using a mobile app on the go, you can practice to your heart's content. This convenience ensures that no matter your schedule, you can fit in study time. Remember, this isn't just a CDL practice test; it's a stepping stone to your success on the road in 2026. So, take a deep breath, relax, and let's get you ready for that Class B CDL!
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Sample Kentucky CDL Test Questions - General Knowledge

Question 1

Which statement describes the safest general approach to backing a heavy vehicle?

  1. A Remain in the cab instead of getting out to check the path
  2. B Avoid backing whenever a practical alternative is available
  3. C Have a helper communicate only by shouting
  4. D Choose right-side backing instead of driver-side backing

Correct answer: B – Avoid backing whenever a practical alternative is available

Avoid backing whenever possible. When parking, select a position that will let you pull forward when leaving. If backing is necessary, inspect the path, use both mirrors, move slowly, favor the driver’s side, and use a helper when one is available.

Source: Kentucky Commercial Driver’s License Manual — § 2.2.4, “Backing Safely”

Question 2

Which of the following should a commercial driver recognize as a possible hazard?

  1. A A delivery truck with the driver’s view blocked
  2. B Workers on or near the roadway
  3. C A disabled vehicle being repaired beside the road
  4. D All of these

Correct answer: D – All of these

A hazard is a roadway condition or road user that presents a possible danger. Delivery vehicles may have obstructed views, roadway workers may be distracted or unable to see approaching traffic, and people repairing disabled vehicles may be exposed to moving traffic. Recognizing these clues early gives a driver more time to respond.

Source: Kentucky Commercial Driver’s License Manual — §§ 2.8.1 and 2.8.3, “Importance of Seeing Hazards” and “Drivers Who Are Hazards”

Question 3

When fighting an engine-compartment fire, you should open the hood fully to reach the base of the fire.

  1. A TRUE
  2. B FALSE

Correct answer: B – FALSE

Turn off the engine as soon as possible, but avoid opening the hood if you can. The CDL manual recommends directing foam through the louvers or radiator or from underneath the vehicle. Always remain as far from the fire as practical and aim the extinguisher at the source or base.

Source: Kentucky Commercial Driver’s License Manual — § 2.21.3, “Fire Fighting”

Question 4

What happens when a vehicle hydroplanes?

  1. A The tires lose contact with the road and have little or no traction
  2. B The steering wheel locks while the tires retain full traction
  3. C The brakes fail because the air pressure becomes too high
  4. D The vehicle gains traction by riding on standing water

Correct answer: A – The tires lose contact with the road and have little or no traction

Hydroplaning occurs when water or slush causes the tires to lose contact with the road surface. With little or no traction, the driver may be unable to steer or brake effectively. Standing water, worn tread, low tire pressure, and excessive speed increase the risk.

Source: Kentucky Commercial Driver’s License Manual — § 2.6.2, “Matching Speed to the Road Surface”

Question 5

Which factors should be considered when selecting a safe speed for a long, steep downgrade?

  1. A Perception distance, lane width, traffic volume, and mirror size
  2. B Reaction time, vehicle height, axle count, and fuel level
  3. C Vehicle and cargo weight, grade length and steepness, road conditions, and weather
  4. D Driver age, transmission brand, cargo type, and trip length

Correct answer: C – Vehicle and cargo weight, grade length and steepness, road conditions, and weather

The Kentucky CDL manual identifies total vehicle and cargo weight, the grade’s length and steepness, road conditions, and weather as the principal factors. A posted speed limit or maximum safe speed must not be exceeded. The selected speed must also allow the driver to use a proper low gear and engine braking.

Source: Kentucky Commercial Driver’s License Manual — § 2.16.1, “Select a ‘Safe’ Speed”

Question 6

Which wheel-and-rim observation may indicate loose wheel nuts during an inspection?

  1. A Rust around the wheel nuts
  2. B A rim that has been repaired by welding
  3. C A missing or broken wheel stud
  4. D Mismatched or bent lock rings

Correct answer: A – Rust around the wheel nuts

Rust around wheel nuts may indicate that the nuts are loose, so their tightness should be checked. Missing studs or lugs and mismatched, bent, or cracked lock rings are also dangerous defects. Wheels or rims that have been repaired by welding are not considered safe.

Source: Kentucky Commercial Driver’s License Manual — § 2.1.3, “What to Look For”

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