Oklahoma CDL Class B Practice Test (OK) 3

4.8 out of 5 (86 votes)
80% Passing score
20 Questions
4 Mistakes allowed
As an Oklahoman gearing up for your Class B CDL, you'll find our third CDL practice test to be an invaluable tool. Tailored specifically for Oklahoma's unique driving laws, this class B practice test not only prepares you for the CDL permit test but also deepens your understanding of local road rules and regulations. With 20 carefully crafted general knowledge test questions, this Oklahoma CDL practice test demands a minimum of 16 correct answers to pass, reflecting the real exam's rigor. Our Oklahoma class B CDL practice test emphasizes a holistic understanding of commercial driving, with questions spanning a diverse array of topics. From the nuances of pre-trip vehicle inspection to the challenges of shifting gears, each question is designed to test your knowledge and readiness for the road. You'll encounter scenarios involving hills, steep downgrades, and the essentials of effective communication with other drivers. Furthermore, we place a strong emphasis on speed control, and drug and alcohol awareness, ensuring that you're not just a skilled driver, but a safe one. One of the standout features of our Oklahoma CDL class B license practice test is its accessibility. Whether you're on a desktop at home or using a mobile device on the go, our platform is always at your fingertips. This flexibility allows you to practice for your written permit test anywhere, anytime, fitting seamlessly into your busy schedule. Another key aspect of our Oklahoma general knowledge CDL practice test is the immediate feedback and detailed explanations provided for each permit test question. This approach isn't just about testing your knowledge; it's about enhancing it. Understanding why an answer is correct or incorrect is crucial in helping you internalize important concepts and improve your skills. Rest assured, each time you retake this online Oklahoma permit practice test, you'll be presented with the same set of questions, enabling you to track your progress and focus on areas that need improvement. We're here to support your path to achieving your Class B CDL in Oklahoma, with tools designed to make you a knowledgeable and confident commercial driver!
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Sample Oklahoma CDL Test Questions - General Knowledge

Question 1

What causes most serious vehicle skids?

  1. A Driving too fast for road conditions
  2. B Brake adjustment alone
  3. C Excess weight on the steering axle
  4. D Using radial tires

Correct answer: A – Driving too fast for road conditions

Most serious skids result from driving too fast for road conditions. Excess speed can force a driver to brake too hard, steer too sharply, or apply too much power to the drive wheels. Choosing a speed appropriate for the roadway, traffic, weather, and vehicle helps prevent these actions from causing a loss of traction.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.19.1, “Drive-wheel Skids—Driving Too Fast”

Question 2

What effect can water in the brakes have?

  1. A Improved stopping traction
  2. B Hydroplaning of the entire vehicle
  3. C More even brake application
  4. D Reduced braking power

Correct answer: D – Reduced braking power

Water in the brakes can make them weak, cause uneven application, or make them grab. The result may be reduced braking power, locked wheels, pulling to one side, or a jackknife when towing a trailer. Brakes can become wet while driving through heavy rain or deep standing water and should be tested carefully after leaving the water.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.13.2, “Driving—Wet Brakes”

Question 3

What should be checked when inspecting a trailer’s air and electrical connections?

  1. A Connectors are seated, sealed, undamaged, and locked
  2. B Air hoses and electrical lines are undamaged and free of air leaks
  3. C Lines are supported and have enough slack for turns without dragging
  4. D All of the above

Correct answer: D – All of the above

The Oklahoma vehicle-inspection procedure requires checking both the connections and the lines running between the power unit and trailer. Connectors must be seated, sealed, undamaged, and locked in place. Air and electrical lines must be free of cuts, cracks, chafing, or wear, and they must be supported with sufficient slack for turns without dragging or snagging.

Source: Oklahoma Commercial Driver’s License Manual — Section 11, § 11.6.1, “Air and Electric Lines / Connectors”

Question 4

What is the primary purpose of hazardous-material placards?

  1. A To warn others about the hazardous materials being transported
  2. B To improve the vehicle’s braking ability
  3. C To identify an oversize load
  4. D To display the carrier’s company colors

Correct answer: A – To warn others about the hazardous materials being transported

Placards are warning signs displayed on the outside of a vehicle or bulk package transporting regulated hazardous materials. Their colors, symbols, and numbers identify the hazard class or specific material involved. This information helps other road users and emergency responders recognize hazards and take appropriate precautions during a crash, spill, leak, or fire.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.23.2, “Placards”, Oklahoma Commercial Driver’s License Manual — Section 9, § 9.3.3, “Lists of Regulated Products—Placards”

Question 5

If an emergency forces your commercial vehicle onto the shoulder, how should you generally use the brakes?

  1. A Brake hard immediately upon leaving the pavement
  2. B Move every wheel off the pavement before slowing
  3. C If possible, wait until about 20 mph, then brake very gently
  4. D Do not brake until the vehicle has completely stopped rolling

Correct answer: C – If possible, wait until about 20 mph, then brake very gently

If possible, avoid braking until the vehicle’s speed has fallen to about 20 mph. Then brake very gently to reduce the chance of skidding on a loose shoulder surface. Keep one set of wheels on the pavement when possible, remain on the shoulder until stopped, and check traffic carefully before returning to the roadway.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.17.2, “How to Leave the Road—Avoid Braking”

Question 6

Without a hazardous-materials endorsement, which load may an Oklahoma CDL holder generally transport?

  1. A Hazardous materials that do not require placards and are not listed select agents or toxins
  2. B Any hazardous materials in a vehicle rated at 26,001 pounds or more
  3. C Any hazardous materials that remain within the state
  4. D Placarded hazardous materials when an endorsed passenger rides along

Correct answer: A – Hazardous materials that do not require placards and are not listed select agents or toxins

A hazardous-materials endorsement is required to operate a vehicle used to transport material requiring placards, as well as specified select agents or toxins. A non-placarded hazardous-material load that does not contain those listed agents generally does not trigger the endorsement requirement. Vehicle weight, intrastate operation, or the presence of an endorsed passenger does not substitute for the driver’s required endorsement.

Source: 49 CFR § 383.93(b)(4) – Endorsements, Oklahoma Commercial Driver’s License Manual — Section 2, § 2.23.2, “Placards”

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