Knowledge Test Class A

This license is required for driving any legal combination of vehicles, including vehicles under Class B and Class C. The GVWR of a trailer is not to exceed 10,000.. Read More

This license is required for driving any legal combination of vehicles, including vehicles under Class B and Class C. The GVWR of a trailer is not to exceed 10,000 pounds. To receive this license, applicants must pass a 50-question test. Each question has three answer choices. To pass, applicants must answer 40 questions correctly. Test questions come from the California Commercial Driver Handbook. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination Vehicles, Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving. Endorsemetns that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, Doubles/Triples, HazMat and Tank, Air Brakes and School bus.

Number of Question
Passing Score

1. You may not consume alcohol within ____ of going on duty.

Explanation
Commercial vehicle drivers are prohibited from consuming any intoxicating beverage, regardless of its alcohol content, within four hours of going on duty.

2. Poor weight balance:

Explanation
Poorly balanced cargo can cause a vehicle to be difficult to handle. Keep weight distribution in mind when loading cargo.

3. Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.

Explanation
Before beginning a trip, it is important to check the brake drums during your walk-around inspection. It is unsafe to drive if any brake drum has a crack more than one half of the width of the friction area.

4. The radiator cap:

Explanation
Never remove the radiator cap or any part of the pressurized cooling system until it has cooled. Opening the cap while the system is too hot could release steam and boiling water that could severely burn you. If the radiator cap is cool to the touch, the system is likely cool enough for you to open the cap.

5. How should you brake if your vehicle's ABS is not working?

Explanation
Without a working Anti-Lock Braking System (ABS), your vehicle will still have normal brake function. Continue to drive and brake as you normally would and have your ABS serviced as soon as possible.

6. When should a driver sign a vehicle inspection report?

Explanation
You must sign a vehicle inspection report only if defects were noted and either certified to have been repaired or certified as not needing to be repaired.

7. Poor weight balance:

Explanation
Poorly balanced loads can lead to unsafe handling. It is important to properly distribute the weight of cargo when loading a vehicle.
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