In an air brake system, the air tanks must be periodically drained to remove accumulations of water and compressor oil. If water is not removed, it could freeze in cold weather and cause brake failure.

Water accumulations freezing and causing brake failure.

Too much air collecting in the tanks.

Distractions while driving can be physical (such as reaching for an object), mental (such as making conversation with a passenger), or both (such as holding a phone to send texts). Strategies to help you avoid distracted driving include pre-programming radio stations; planning out your route in advance; avoiding complex or emotionally taxing conversation while driving; adjusting your mirrors before setting out; and not eating, drinking, or smoking while behind the wheel.

Can occur as a result of mental activities, such as daydreaming.

Only occurs as a result of people who are physically doing something while driving.

Can occur as a result of mental activities, such as daydreaming.

Is encouraged on uncrowded roads.

When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs. Any defect of this kind is dangerous. If one-fourth or more of the leaves are missing from any leaf spring, the vehicle must be put out-of-service.

The vehicle will be put out-of-service until it is fixed.

The vehicle’s driver will be allowed to drive, but only at reduced speeds.

The vehicle will be put out-of-service until it is fixed.

The vehicle will be fine to drive since most of the spring is in place.

It is essential that your low pressure warning light functions properly. After allowing the system to charge, you can test the warning signal by rapidly applying and releasing the brake pedal. This will release air from the braking system and the warning signal should come on when pressure drops to a dangerous level.

Rapidly pressing and releasing the brake pedal.

Turning on the engine and applying the trailer hand brake.

Rapidly pressing and releasing the brake pedal.

Removing wheel chocks and disengaging the parking brake.

Double Triple Test | Oklahoma 2026 #2 Page 3 of 3

Train for FREE with our Oklahoma CDL double triple practice test online. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a OK CDL double triple license in 2026, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that DMV requirements may vary from state to state.

Number of Question 20

Passing Score 16

Number of Tests 20

Double Triple Test | Oklahoma 2026 #2 Page 3 of 3

15 . Failing to drain air tanks could result in:

16 . Distracted driving:

17 . If one-fourth of the leaves in a leaf spring are missing when a vehicle is inspected:

18 . Before entering a curve, you should:

19 . You should test the low pressure warning signal by:

20 . Alcohol can be removed from your system:

See the exact questions that will be on the 2026 DMV exam.

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