Kentucky CDL General Knowledge Test (KY) 5

4.9 out of 5 (50 votes)
80% Passing score
50 Questions
10 Mistakes allowed
If you're preparing for your CDL in Kentucky, our fifth Kentucky CDL General Knowledge Practice Test is a crucial resource to help you get ready in 2026. Unlike the actual CDL permit test, this DMV practice test isn't timed, giving you the freedom to thoroughly explore each question without the pressure of a ticking clock. This relaxed approach is crucial for deep learning and understanding, particularly since the real general knowledge test operates under time constraints. Our KY CDL general knowledge practice test features 50 questions, mirroring the format of the actual CDL exam. To pass, you'll need to correctly answer at least 40 questions. But don't worry if you don't get it right the first time. One of the great advantages of this CDL practice test is the opportunity for multiple attempts. You can take this KY CDL practice test online as many times as you need to feel confident and prepared. This repeated practice is not just about memorization; it's about truly understanding the material and being ready for the variety of challenges the actual 2026 CDL permit test may present. What sets our Kentucky CDL general knowledge practice test apart is its integration of real-life scenarios. These DMV test questions aren't just theoretical; they're drawn from real-world situations you'll encounter on the road. This practical approach helps bridge the gap between textbook learning and the realities of commercial driving. It's one thing to know the rules; it's another to apply them when you're behind the wheel. So, take your time with each question. Reflect on your answers, and understand not just what the right answer is, but why it's right. This KY CDL general knowledge practice test is more than a stepping stone to your next exam; it's a comprehensive tool designed to enhance your understanding and prepare you for a successful career in commercial driving in Kentucky!
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Sample Kentucky CDL Test Questions - General Knowledge

Question 1

Which procedure correctly checks hydraulic brakes for leaks?

  1. A While moving, pump the pedal three times and hold firm pressure for five seconds
  2. B While moving, pump the pedal five times and hold pressure for three seconds
  3. C While stopped, pump the pedal three times and hold firm pressure for five seconds
  4. D While stopped, pump the pedal five times and hold pressure for three seconds

Correct answer: C – While stopped, pump the pedal three times and hold firm pressure for five seconds

With the vehicle stopped and the engine started, pump the hydraulic brake pedal three times. Apply firm pressure and hold it for five seconds. The pedal should remain in place; movement can indicate a leak or another brake-system problem that must be corrected before driving.

Source: Kentucky Commercial Driver’s License Manual — § 2.1.5, “Seven-Step Inspection Method—Test for Hydraulic Leaks”

Question 2

When should a speed retarder be turned off?

  1. A On wet, icy, or snow-covered roads
  2. B Whenever the driver slept fewer than six hours
  3. C Whenever liquid cargo is being transported
  4. D Only while climbing a steep grade

Correct answer: A – On wet, icy, or snow-covered roads

The Kentucky CDL manual warns against using an engine brake or speed retarder on slippery roads. Retarders can slow the drive wheels enough to produce a skid when traction is poor. Turn the retarder off on wet, icy, or snow-covered pavement and use smooth braking appropriate for the conditions.

Source: Kentucky Commercial Driver’s License Manual — § 2.13.2, “Driving—Slippery Surfaces”

Question 3

Which statement about alcoholic drinks is accurate?

  1. A Coffee quickly removes alcohol from the body
  2. B A 12-ounce 5% beer contains about as much alcohol as a 1.5-ounce shot of 80-proof liquor
  3. C Experienced drinkers are not affected by alcohol
  4. D Drinking rapidly keeps the blood alcohol concentration lower

Correct answer: B – A 12-ounce 5% beer contains about as much alcohol as a 1.5-ounce shot of 80-proof liquor

A 12-ounce serving of 5% beer, a 5-ounce serving of 12% wine, and a 1.5-ounce shot of 80-proof liquor contain approximately equal amounts of alcohol. The beverage type does not prevent impairment. Drinking faster generally raises blood alcohol concentration rather than reducing it.

Source: Kentucky Commercial Driver’s License Manual — § 2.22.1, “Alcohol and Driving—What Is a Drink?”

Question 4

What must a driver do when approaching a STOP sign?

When approaching this sign _____________.
  1. A Stop only when cross traffic is present
  2. B Slow and yield without stopping
  3. C Look both ways while continuing to roll
  4. D Come to a complete stop at the required stopping point

Correct answer: D – Come to a complete stop at the required stopping point

At a Kentucky STOP sign, the driver must stop at the marked stop line. If there is no line, the driver stops before the near crosswalk or at the nearest point with a view of approaching traffic. After stopping, the driver must yield to vehicles that present an immediate hazard.

Source: KRS § 189.330(3)-(4) — Turning and right-of-way at intersections

Question 5

Before descending a long, steep grade in a newer truck, which gear should you usually select?

  1. A A lower gear than would be needed to climb the same grade
  2. B The same gear used to climb the grade
  3. C A higher gear than would be used while climbing
  4. D Neutral, while controlling speed with the brakes

Correct answer: A – A lower gear than would be needed to climb the same grade

The Kentucky CDL manual advises shifting into a low gear before beginning a downgrade. Newer trucks may climb in higher gears but have less friction and air resistance to slow them during descent. The downhill gear may need to be lower than the gear used to climb the same hill.

Source: Kentucky Commercial Driver’s License Manual — § 2.3.1, “Manual Transmissions—Before Starting Down a Hill”, Kentucky Commercial Driver’s License Manual — § 2.6.6, “Speed on Downgrades”

Question 6

Which description defines reaction distance?

  1. A The distance traveled after recognizing the need to brake but before physically applying the brakes
  2. B The distance traveled between first seeing a hazard and recognizing it
  3. C The distance traveled after the brakes are applied
  4. D The full distance from first seeing a hazard until the vehicle stops

Correct answer: A – The distance traveled after recognizing the need to brake but before physically applying the brakes

Reaction distance is the distance traveled while the driver responds to a recognized hazard and moves to apply the brakes. It does not include perception distance, which occurs before the hazard is recognized. It also does not include the distance traveled after braking begins.

Source: Kentucky Commercial Driver’s License Manual — § 2.6.1, “Stopping Distance—Reaction Distance”

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