Instructions

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 test. To pass, applicants must answer 40 questions correctly. Each question has four possible answer choices. Test questions come from the Commercial Driver License 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 50

Passing Score 40

1. If a tire fails, the driver should:

Keep one hand on the steering wheel and use their other hand to wave to other drivers.

Stomp on the brakes.

Not use the brakes.

Accelerate.

If a tire fails, braking could cause a loss of control. Unless braking is necessary to avoid a hazard, you should stay off the brakes until your vehicle has slowed considerably. Only then should you brake very gently, pull off the road, and stop.

2. To ensure applicants only have one license:

You will be asked to sign a form.

States share a database with drivers' information.

Your wallet will be searched.

It is prohibited for any person to possess more than one driver license. All states share drivers' information in a computer database to help prevent issuance of licenses to drivers who already have them.

3. What happens when a vehicle hydroplanes?

The tires lose contact with the road.

The tires have extra traction.

The vehicle is easier to control.

The vehicle becomes heavier.

Hydroplaning occurs when a vehicle's tires lose contact with the road surface and instead glide along on a film of water above the surface of the road.

4. To stop in a vehicle that uses air brakes, the driver should:

Pull the air brake lever.

Engage the brake lever.

Push the brake pedal down.

Pull the brake pedal up.

To make a normal stop in a vehicle with air brakes, push the brake pedal down. The harder the pedal is pressed, the more air pressure is released.

5. Brake fade is a result of:

Exposure to sunlight.

Exposure to moisture.

Excessive use.

Not using the brakes enough.

If brakes are used too much, they will overheat and become less effective. This is referred to as brake fade.

6. If a traffic light has been green for a long time:

It will probably stay green as you approach.

It is likely broken.

It is likely that the light will soon change to yellow.

It is likely the light will skip yellow and change from green to red.

If you are approaching a traffic light that has been green for a long time, there is a good chance that it will turn yellow before you reach it. Start slowing down and be ready to stop.

7. When inspecting your brakes, a slack adjuster should move ____ from where it is attached to the push rod.

At least three inches

More than two inches

Up to five inches

No more than one inch

Check each slack adjuster after setting wheel chocks and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

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