DMV Cartedefr · California · cdl · Class B Knowledge Test 1

California cdl Class B Knowledge Test - 1

Number of questions: 50

Passing score: 80%

Acceptable number of errors: 10

This license is required for driving a single vehicle with a GVWR of more than 26,000 pounds, a 3-axle vehicle weighing over 6,000 pounds, a bus (except a trailer bus), with endorsement or any farm labor vehicle, with endorsement. 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. Endorsements that may be used with a Class B CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.

To DMV Handbooks

3. Why do large vehicles use air brakes?

A ×

Other brake systems squeak too loudly.

B

Air brakes are very effective systems.

C ×

Other braking systems are hard to come by.

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