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 three possible answer choices. Test questions come from the Vermont Commercial Driver’s 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. Be sure that your wheel bearing/seals are:

Not leaking.

Shiny.

Rusted.

During an inspection, ensure that the wheel bearing/seals are not leaking.

2. What kind of brakes do most newer heavy-duty trucks use?

Single air brakes

Dual air brakes

Triple air brakes

Most newer heavy-duty vehicles use dual air brake systems. A dual air brake system has two separate air brake systems which use a single set of brake controls.

3. When entering a curve, you should:

Shift into neutral.

Use the shoulder.

Downshift.

You should always slow down to a safe speed and shift into a lower gear before entering a curve.

4. When starting an engine:

The brakes will lock up.

Warning lights should turn on, then quickly turn off.

Coolant temperatures should decrease.

After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.

5. If the brakes pull to one side or the other when used:

They are working properly.

They need to be checked.

They will be the most effective.

If the brakes pull to one side or the other when used, it is an indication of brake trouble.

6. When driving, knowing what is happening behind you is:

Rarely important.

Important.

Distracting.

To travel safely, it is essential that you know what is happening on all sides of your vehicle at all times. Use your mirrors frequently to help you remain aware of your surroundings.

7. Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:

Are necessary for the proper function of the system.

Should take up about 10 percent of the tank.

Should be removed regularly.

If water and compressor oil are left to build up in an air brake system, the system can be damaged. Air storage tanks are equipped with drains to allow this accumulation to be removed. Manually controlled drains should be operated at the end of each day of driving.

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