Oregon CDL Class A, B or C DMV Practice Tests & Cheat Sheets

CDL Class A, B or C. Complete CDL driver training course. All the questions in this test are from the official DMV written exam. You can use our free online tests to evaluate how likely you are to pass the official DMV test. Or you can just cut to the chase and increase your chances of passing by upgrading to Premium Membership and unlock official DMV tests. In addition, you will also receive a master cheat sheet which contains all your state’s DMV questions and answers. Premium membership also unlocks a smart tracker which keeps an inventory of all incorrectly answered questions for easy, fast and effective revision. Practice with our free tests or hit Upgrade button below for premium access and increase your chances of passing your DMV written exam.

99.5% Pass Rate

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Quick Facts:

Number of Questions – 20

Passing Percentage – 80%

Test Type – Free Test

Help a driver avoid wheel lockup
Lock up the front wheels
Prevent a vehicle from accelerating while traveling uphill
Prevent a vehicle from accelerating while traveling downhill

A truck driver is driving too fast.
The driver of a vehicle in front of a truck is moving to slowly.
A truck driver is driving too slowly.
ABS is working effectively.

By using a diamond-shaped yellow knob.
By using a round red knob.
By using a square green knob.
By using a black round knob.

The brakes may squeak.
The brakes may not work.
The brakes may be sluggish.
The brakes will be very sensitive.

Oregon DMV CDL Air Brakes Quick Practice Test

Oregon DMV CDL Air Brakes Quick Practice Test For 2024

99.5% Pass Rate

Compressed air
Liquid air
Nitrogen

Green
Blue
Yellow

The warning light should activate.
The vehicle will be unable to shift out of gear.
The front lights should flash.

Mechanical force.
Air pressure.
Gravity.