Oklahoma CDL Combination Test 1

Question 1

To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:

Pump the air brakes to activate the ABS. Look into the back of the fifth wheel. Check for wheel speed sensors coming from the back of the brakes.

Correct Answer:

Check for wheel speed sensors coming from the back of the brakes.

Question 2

Pushing in the trailer air supply control will:

Supply the trailer with air. Deactivate the air brakes. Prevent the vehicle from skidding.

Correct Answer:

Supply the trailer with air.

Question 3

Rollovers happen when:

Drivers turn too quickly. Drivers turn too slowly. It is raining.

Correct Answer:

Drivers turn too quickly.

Question 4

If a trailer begins to skid, it is best for the driver to:

Release the brakes. Accelerate. Quickly turn the steering wheel in one direction, then in the other.

Correct Answer:

Release the brakes.

Question 5

Rearward amplification refers to:

The amount of noise projected to the rear of a vehicle. The cause of the "crack-the-whip" effect. The number of trailers that can be pulled by a tractor.

Correct Answer:

The cause of the "crack-the-whip" effect.

Question 1 of 19

Exam overview

About this Exam

Prepare with the Oklahoma CDL Combination Test 1 practice quiz. This question bank includes 19 questions covering trailer, vehicle, supply, control, and coupling. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Oklahoma CDL Combination Test 1

This practice set contains 19 questions from the matching question bank and focuses on trailer, vehicle, supply, control, and coupling. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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Oklahoma CDL Combination Test 1

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