Oklahoma CDL General Knowledge Test (OK) 5

5 out of 5 (58 votes)
80% Passing score
50 Questions
10 Mistakes allowed
As Oklahomans gearing up for the CDL test, you know the road ahead demands not just skill, but also thorough preparation. That's where our fifth Oklahoma CDL General Knowledge Practice Test comes in, tailor-made to give you the edge you need. This specific permit practice test, part of our expansive suite of CDL practice tests, is crafted to mirror the actual 2026 DMV test's format and difficulty. Our Oklahoma CDL practice test comprises 50 meticulously selected questions, designed to test your knowledge and understanding of the latest driving laws and regulations. We've ensured that the content stays fresh, updating it for 2026, so you're always learning the most current information. This up-to-date approach is crucial, as staying abreast of new laws is essential for every commercial driver. We understand that preparing for the Oklahoma permit test can be stressful. That's why we've created a no-pressure environment with our practice tests. You can take this Oklahoma CDL general knowledge test multiple times, and you'll encounter the same set of permit test questions, allowing you to focus on learning at your own pace, without the stress of the unknown. It's a chance to build confidence and knowledge, all from the comfort of your home or on the go, thanks to our accessible online platform that works seamlessly across desktops and mobile devices. Remember, the goal here isn't just to pass but to excel. With a passing mark set at 80%, answering at least 40 out of 50 DMV questions correctly, you're not just preparing to meet the minimum standards; you're aiming to be among the best. And with the flexibility and convenience of our Oklahoma CDL practice test, that goal is well within your reach!
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Sample Oklahoma CDL Test Questions - General Knowledge

Question 1

What is the minimum tread-groove depth for a truck’s front tires?

  1. A 4/32 inch
  2. B 2/32 inch
  3. C 7/16 inch
  4. D 3/8 inch

Correct answer: A – 4/32 inch

Federal equipment rules require at least 4/32 inch of tread depth on the front wheels of a bus, truck, or truck tractor. The measurement is taken in a major tread groove and not at tie bars, humps, or fillets. Other tires generally require at least 2/32 inch.

Source: Oklahoma Commercial Driver’s License Manual — § 2.1.3, “Tire Problems”, 49 CFR § 393.75(b), (c) — Tires

Question 2

How far ahead should a commercial driver generally scan while driving?

  1. A 2–5 seconds
  2. B 5–10 seconds
  3. C 12–15 seconds
  4. D 15–25 seconds

Correct answer: C – 12–15 seconds

Good drivers generally look at least 12 to 15 seconds ahead, based on the distance the vehicle will travel during that time. This is about one block at lower speeds and roughly one-quarter mile at highway speeds. Drivers should continue shifting their attention between nearby conditions and the roadway farther ahead.

Source: Oklahoma Commercial Driver’s License Manual — § 2.4.1, “How Far Ahead to Look”

Question 3

Which action most directly increases the risk of a truck rollover in a turn?

  1. A Entering the turn too fast
  2. B Driving on wet pavement
  3. C Making the turn at night
  4. D Entering the turn slowly

Correct answer: A – Entering the turn too fast

The Oklahoma CDL manual warns that rollovers happen when drivers turn too fast. Combination vehicles are especially vulnerable when cargo raises the center of gravity or is loaded off-center. Slow to a safe speed before corners, entrance ramps, and exit ramps, and steer smoothly through the turn.

Source: Oklahoma Commercial Driver’s License Manual — § 6.1.1, “Rollover Risks”

Question 4

Which description best matches black ice?

  1. A A thin, clear layer of ice through which the pavement remains visible
  2. B A pile of ice that is almost completely melted
  3. C Ice found only along the roadway’s edge
  4. D A harmless discoloration on the pavement

Correct answer: A – A thin, clear layer of ice through which the pavement remains visible

Black ice is a thin, clear layer that allows the pavement beneath it to remain visible. Because it often makes the road look wet rather than frozen, it can be difficult to recognize. When the temperature is below freezing and the pavement appears wet, watch carefully for black ice.

Source: Oklahoma Commercial Driver’s License Manual — § 2.6.2, “Black Ice”

Question 5

How do you perform controlled braking during an emergency stop?

  1. A Lock the wheels and keep them locked until the vehicle stops
  2. B Brake as hard as possible without locking the wheels
  3. C Fully apply the brakes, release them after lockup, and repeat
  4. D Avoid using the service brakes on a heavy vehicle

Correct answer: B – Brake as hard as possible without locking the wheels

Controlled braking means applying the brakes as hard as possible without locking the wheels. Keep steering movements small while braking. If the wheels lock or a larger steering correction is necessary, release the brakes and reapply them as soon as possible.

Source: Oklahoma Commercial Driver’s License Manual — § 2.17.2, “Controlled Braking”

Question 6

When choosing how to park a commercial vehicle, which arrangement is preferred?

  1. A Park where the inspection can be completed from the driver’s seat
  2. B Park so you can pull forward when leaving
  3. C Limit the required backing distance to exactly 10 feet
  4. D Park as close as possible to a highway entrance ramp

Correct answer: B – Park so you can pull forward when leaving

The Oklahoma CDL manual advises avoiding backing whenever possible because a driver cannot see everything behind a commercial vehicle. When parking, try to position the vehicle so you can leave by pulling forward. If backing is unavoidable, inspect the path, use both mirrors, and back slowly.

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

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