Oklahoma · CDL

Oklahoma CDL Practice Test

The Oklahoma CDL knowledge test is administered by Service Oklahoma. This free practice test covers the 10 areas the Service Oklahoma Commercial Driver License Manual teaches, from oklahoma cdl classes permits testing and driver qualifications to hazardous materials and school bus safety, with 100 questions written for Oklahoma and every answer explained. Pick 25, 50, or 100 questions and start; there is no sign-up.

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Take the Oklahoma CDL practice test

The Oklahoma bank holds 100 questions written for the Service Oklahoma Commercial Driver License Manual (March 2025), 1 of them illustrated with a sign, signal, marking, or road scene. Choose a Quick check of 25, a Practice run of 50, or the Full challenge of 100 on the next screen, then choose coaching mode, which explains every answer as you go, or exam mode, which holds the explanations until the end and still shows your running score. It is free, there is no sign-up, and a test in progress is saved on this device.

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Sample questions

Six questions from the Oklahoma bank, with the rule behind each answer

Sample 1 · Oklahoma Cdl Classes Permits Testing And Driver Qualifications

A power unit and livestock trailer carry a 27,900-pound combined rating, with 10,500 pounds assigned to the trailer. Which class definition is met?

  1. Class A, because the combination reaches 26,001 pounds and the towed rating is over 10,000 poundsCorrect
  2. Class B, because livestock turns every trailer into part of one straight truck
  3. Class C, because farm cargo prevents use of the combination ratings
  4. No CDL, because the trailer exceeds the power unit's passenger capacity

Why: Both Class A rating conditions are present: at least 26,001 pounds for the combination and more than 10,000 pounds for the towed unit.

Sample 2 · Speed Space Hazards Weather And Railroad Crossings

A pickup shown in a convex mirror seems to have plenty of room behind the trailer. What should the commercial driver remember before changing lanes?

  1. Convex glass makes traffic look smaller and more distant, so the pickup may be nearer than the image suggestsCorrect
  2. Convex glass makes all traffic appear closer than it really is
  3. The mirror supplies an exact measured distance and needs no judgment
  4. Small reflected vehicles are always stopped on the shoulder

Why: Convex mirrors widen the view by distorting apparent size and distance, which requires cautious interpretation and brief checks.

Sample 3 · Cargo Inspection Weight Balance And Securement

A loading crew says its supervisor accepted the freight arrangement. What safety checks must the driver still own?

  1. Cargo inspection, overload and balance recognition, securement, visibility, and access to emergency equipmentCorrect
  2. Only counting warehouse employees before closing the dock
  3. No checks, because another person's loading ends driver responsibility
  4. Removing emergency equipment to create more cargo space

Why: The driver remains responsible for how the load affects safe operation no matter who placed or tied down the cargo.

Sample 4 · Passenger Vehicle Inspection Loading And Operation

The previous driver recorded an inoperative exterior light on a bus. When is the replacement driver permitted to sign the report?

  1. After hiding the report beneath the driver's seat
  2. Once passengers board, even with no repair decision
  3. After a certification shows repair was completed or was determined unnecessaryCorrect
  4. Before reading the listed defect

Why: A signature follows documented resolution of each listed defect, whether by repair or a certified no-repair determination.

Sample 5 · Combination Vehicle Control Coupling And Inspection

Cargo is concentrated high and to the right in a combination trailer. Which loading change reduces its rollover leverage?

  1. Shift everything behind one axle without checking limits
  2. Raise the center of gravity so curves have less effect
  3. Move the mass downward, toward the center, and distribute it more evenlyCorrect
  4. Add more high cargo against the same sidewall

Why: Lower and more balanced weight reduces both vertical and side-to-side center-of-gravity risk.

Sample 6 · Hazardous Materials And School Bus Safety

A hazmat carton is crushed, leaking, and missing required preparation. Which acceptance decision fulfills the driver's role?

  1. Accept it because the carrier can ignore package condition
  2. Remove the vehicle placards and place the carton in the cab
  3. Reject the carton before transportCorrect
  4. Hide it beneath sound packages and depart

Why: The driver is the final transportation check against leaking or improperly prepared hazardous-material packages.

What is on the test

The 10 topics the Oklahoma CDL practice test covers

These are Oklahoma's own topic areas, from oklahoma cdl classes permits testing and driver qualifications to hazardous materials and school bus safety, each with 10 questions. Under each one are two questions from the bank, shown without their answers; the practice test explains every one of them.

  1. Oklahoma Cdl Classes Permits Testing And Driver Qualifications10 questions
    • A refuse truck rated at 33,000 pounds pulls a 5,000-pound-rated equipment cart. How should that configuration be classified?
    • A light airport van was designed for sixteen occupants when its driver is included. What commercial-license trigger applies?
  2. Vehicle Inspection Control Visibility And Communication10 questions
    • Inspection uncovers a broken suspension mount before a loaded truck leaves. What outcome shows why that inspection mattered?
    • The oil-pressure gauge changes while the driver sees vapor and smells coolant. Which inspection approach uses all of those clues?
  3. Speed Space Hazards Weather And Railroad Crossings10 questions
    • A driver signals a lane change early but cancels before the trailer crosses the lane line. What would complete the communication correctly?
    • In the illustration, the truck is in its right-hand lane on a water-covered roadway. If the tires begin hydroplaning, what control change should the driver expect?
  4. Emergencies Abs Skids Crashes Fires And Driver Fitness10 questions
    • A stalled car blocks only the left half of the lane. How should a truck driver shape the emergency steering move around it?
    • Which brake technique gives maximum controlled deceleration without accepting a sustained wheel lock?
  5. Cargo Inspection Weight Balance And Securement10 questions
    • How soon after leaving with a fresh load should the driver complete the first en-route cargo inspection?
    • After the first cargo recheck, the driver stops for a meal only one hour later. Does that break create another inspection point?
  6. Passenger Vehicle Inspection Loading And Operation10 questions
    • A bus has an open fuel access door but every passenger entrance is closed. May it leave?
    • The aisle is clear, but an emergency-exit latch sticks and a seat rocks at its mount. What must inspection address?
  7. Air Brake Components Inspection And Use10 questions
    • Which air-brake subsystem supplies ordinary pedal stops rather than parked restraint or failure response?
    • Pressure falls after the compressor governor previously reached cut-out. What should the governor do near cut-in?
  8. Combination Vehicle Control Coupling And Inspection10 questions
    • Why can a minor abrupt turn at a tractor become a major swing at the back of a long combination?
    • A bobtail tractor begins skidding under moderate brake pressure. Which physical condition may explain the poor result?
  9. Doubles Triples And Tank Vehicle Operation10 questions
    • A steering snap travels through two converter dollies. Which part of the combination is most likely to receive the largest lateral motion?
    • How should a driver order twin trailers when one carries far more weight?
  10. Hazardous Materials And School Bus Safety10 questions
    • A driver places hazardous-material papers in the door pouch, clearly separated from other documents. Why is that location useful?
    • What does a shipper affirm by signing the hazardous-material certification?
How to prepare

A study plan for the Oklahoma CDL knowledge test

1

Find out where you stand

Take a Quick check of 25 in coaching mode. Read each explanation, including the ones you got right; it tells you the rule Oklahoma tests, not just the answer.

2

Study the topics you missed

Your account's Study tab ranks the 10 topics by your results. Read that chapter of the Service Oklahoma Commercial Driver License Manual, then take another Quick check to confirm the gap has closed.

3

Rehearse the real thing

Take the Full challenge of 100 in exam mode. Aim for 80 percent or better twice in a row; at that point you are answering from the rules, not from memory of the questions.

Questions

Oklahoma CDL practice test questions

Is this the official Oklahoma CDL knowledge test?

No. DMV Exam Pass is an independent study service and is not affiliated with Service Oklahoma. The questions are written in the style of the exam to prepare you for it; the official test is taken with the agency.

What does the Oklahoma CDL practice test cover?

The 100 questions are spread evenly across 10 topics: Oklahoma Cdl Classes Permits Testing And Driver Qualifications, Vehicle Inspection Control Visibility And Communication, Speed Space Hazards Weather And Railroad Crossings, Emergencies Abs Skids Crashes Fires And Driver Fitness, Cargo Inspection Weight Balance And Securement, Passenger Vehicle Inspection Loading And Operation, Air Brake Components Inspection And Use, Combination Vehicle Control Coupling And Inspection, Doubles Triples And Tank Vehicle Operation, and Hazardous Materials And School Bus Safety. Every test you take draws from all of them, so a weak area shows up quickly.

How many questions are in the practice test, and how long does it take?

The Oklahoma bank holds 100 questions. A Quick check of 25 takes about ten minutes, a Practice run of 50 about twenty, and the Full challenge of 100 about forty. You can pause any time.

Are these the real questions from the Oklahoma exam?

No. Nobody outside the agency has the real questions, and we do not use, claim, or advertise leaked or exact exam questions. These are independently written questions that test the same rules, so what you learn transfers to whatever the real test asks.

Which handbook should I study for the Oklahoma CDL knowledge test?

The Service Oklahoma Commercial Driver License Manual (March 2025), published by Service Oklahoma. Every question here is written for it, and each explanation names the rule, so when you miss a question you know which chapter to read.

What is the difference between coaching mode and exam mode?

Coaching mode shows whether each answer was right, and why, before you move on; it is for learning. Exam mode holds the explanations and the correct choices until the end and still shows your running score; it is for checking readiness. Both draw from the same bank, and scoring happens on our servers, so no answer key is loaded in your browser.

Does the practice test include road signs and pictures?

Yes. 1 of the 100 questions are illustrated with a sign, signal, marking, or road scene, the way the CDL knowledge test presents them.

Is the Oklahoma practice test free, and do I need an account?

It is free, with no sign-up. An optional account saves your progress across devices and shows which topics need work.

Can I pause and come back later?

Yes. A test in progress is saved on this device and offered again when you return. With an account, it is saved to your account as well, so you can continue on another device.

What score should I aim for before test day?

Aim for 80 percent or better on a Full challenge in exam mode, more than once. The official passing score is set by the agency; scoring consistently above 80 here means you are answering from the rules rather than from luck.