Oregon Driver’s Examination

Knowledge Test Class A

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question..

This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three or four possible answer choices. Test questions come from the Oregon Commercial Driver Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

Number of Question
Passing Score

When checking your tires as part of the pre-trip inspection, you should look at the:

Explanation
When checking your tires as part of a pre-trip inspection, it is important to verify that the tire pressure is neither too low nor too high.

When driving in the winter, which of the following should receive extra attention in a pre-trip inspection?

Explanation
When driving during the winter, it is especially important to make sure the coolant and antifreeze are at safe levels.

A broken exhaust system can:

Explanation
Defects in an exhaust system are very dangerous because they can cause poisonous fumes to enter the cab or sleeper berth.

To stay alert while driving, you should:

Explanation
Splitting driving responsibilities with a second driver lowers the chance that either of you will drive while fatigued. You can also reduce the risk of fatigue by avoiding heavy foods and keeping the interior of the cab cool.

When loading cargo, weight should be placed:

Explanation
A vehicle is vulnerable to tipping over if its center of gravity is too high. To prevent this, you should distribute the weight of your cargo evenly and as low as possible.

Distracted driving:

Explanation
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).

What is often found in compressed air?

Explanation
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Tanks must be drained regularly to remove this build-up.
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