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 Handbooks47. When an S-cam turns inside a brake drum, the S-cam:
Presses the brake shoes against the inside of the brake drum.
Presses the brake shoes against the brake linings.
Presses the brake linings against the wheel axles.