Oklahoma CDL General Knowledge Practice Test (OK) 2

4.6 out of 5 (103 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Gear up for the Oklahoma CDL General Knowledge Practice Test - your essential step towards acing the CDL test in 2026! This second Oklahoma permit practice test is designed to mirror the real DMV permit test, with 20 multiple-choice questions covering a wide array of topics essential for every aspiring commercial driver. Whether you're aiming for a Class A or Class B driver's license, or looking to add endorsements, this Oklahoma CDL general knowledge practice test is your starting point. Each permit test question in this practice test is rooted in the official Oklahoma CDL driver's manual, the core material for both the practice and real CDL tests. We ensure the sample questions are directly aligned with the latest version of the manual, guaranteeing you study only relevant and test-appropriate content. Updated for 2026, this Oklahoma CDL practice test reflects the most current driving laws and regulations, so you're learning with the most up-to-date information. This Oklahoma CDL general knowledge test practice encompasses various subjects crucial for a commercial driver, such as pre-trip vehicle inspection, basic vehicle control, shifting gears, handling hills and steep downgrades, effective communication on the road, speed control, and drug and alcohol awareness. These topics are not just pivotal for passing the real Oklahoma permit test in 2026, but also for your safety and competence on the road. You can take this Oklahoma practice permit test as many times as you need. We encourage repeated attempts to ensure you're completely comfortable with the material before progressing to subsequent exams. This approach helps to build your confidence and knowledge, ensuring you're well-prepared for the actual CDL permit test. Remember, this Oklahoma CDL general knowledge practice test is a fundamental tool in your preparation arsenal. Utilize it to its fullest to sharpen your skills and knowledge. Let's ace that CDL exam together in 2026!
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Sample Oklahoma CDL Test Questions - General Knowledge

Question 1

Which materials are included among the limited hazardous-material exceptions for a vehicle carrying passengers for hire?

  1. A Small-arms ammunition
  2. B Emergency shipments of hospital supplies
  3. C Emergency shipments of drugs and chemicals
  4. D All of the above

Correct answer: D – All of the above

The passenger-vehicle rules identify small-arms ammunition and emergency shipments of drugs, chemicals, and hospital supplies among the limited exceptions. Other hazardous materials are generally restricted when another practicable means of transportation is available. Applicable quantity, packaging, and storage restrictions must still be followed, and most explosives cannot be carried in the passenger compartment.

Source: 49 CFR § 177.870(b)–(f) – Regulations for passenger carrying vehicles

Question 2

Which statement about steering and exhaust-system inspection is correct?

  1. A More than 10 degrees of steering-wheel play can make the vehicle difficult to steer
  2. B An exhaust leak is acceptable when it is outside the cab
  3. C A small power-steering-fluid leak is considered normal
  4. D Opening a window makes it acceptable to drive with an exhaust leak

Correct answer: A – More than 10 degrees of steering-wheel play can make the vehicle difficult to steer

Steering-wheel play exceeding 10 degrees—about 2 inches at the rim of a 20-inch steering wheel—can make steering difficult. Power-steering hoses, pumps, and fluid levels must be checked for leaks. The exhaust system must also be secure and free of leaks; opening a window does not correct a defective exhaust system.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.1.2, “Vehicle Inspection Guide—Steering System Defects”, Oklahoma Commercial Driver’s License Manual — Section 2, § 2.1.4, “Seven-step Inspection Method”

Question 3

Which checks should be included when inspecting a trailer’s cargo-retaining equipment?

  1. A Verify that the header board is adequate and secure
  2. B Make sure any required canvas or tarp is properly secured
  3. C Check that side boards or stakes are strong, undamaged, and properly positioned
  4. D All of the above

Correct answer: D – All of the above

The inspection should confirm that the header board is adequate and secure when one is required. Side boards and stakes should be strong enough for their purpose, free from damage, and properly positioned. Any required canvas or tarp must also be secured so that it cannot tear, billow, or obstruct the mirrors.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.1.4, “Seven-step Inspection Method—Right Side”

Question 4

Which two indicators can help a driver determine when to shift gears?

  1. A Engine sound and coolant temperature
  2. B Engine speed and road speed
  3. C Time in the current gear and clutch-pedal movement
  4. D Clutch pressure and falling air pressure

Correct answer: B – Engine speed and road speed

A driver can use engine speed or road speed to decide when to shift. Learn the vehicle’s proper operating rpm range and monitor the tachometer, shifting when the engine reaches the appropriate point. Also learn the useful road-speed range for each gear and use the speedometer to determine when an upshift is needed.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.2.2, “Knowing When to Shift Up”

Question 5

Water can be used safely on which of these fires?

  1. A An energized electrical fire
  2. B A gasoline fire
  3. C Neither fire
  4. D Both fires

Correct answer: C – Neither fire

Water should not be used on an energized electrical fire because it can cause electrical shock. It also should not be used on a gasoline fire because it can spread the burning fuel and flames. Water is generally appropriate for ordinary combustible materials such as wood, paper, and cloth, while the extinguisher must be matched to other fire classes.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.21, “Fires—Use the Right Fire Extinguisher”

Question 6

If there is too little room to stop during an emergency, steering around the hazard may be the safer response.

  1. A True
  2. B False

Correct answer: A – True

Stopping is not always the safest emergency action. When the available distance is insufficient for a complete stop, the driver may need to steer away from the hazard. A vehicle can often turn around an obstacle more quickly than it can stop, but the driver must maintain control and avoid creating a collision in the escape path.

Source: Oklahoma Commercial Driver’s License Manual — Section 2, § 2.17.1, “Steering to Avoid a Crash”

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