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Welcome to DIY California Commercial Driving web pages. This site is designed to help pass all the California Class-A, Class-B, Class C (Motor Vehicle), Motorcycle,  drivers study for their exams. This area also shows tests for all the Endorsements needed for example: School Bus, Passenger Endorsements, Combination Vehicles, Double and triples, Class A General Knowledge, Tank Vehicle, and Hazardous Material. Each test shows 36 questions unless stated.

To drive a commercial vehicle in California the following is needed to obtain a class-a driving license.

    H Endorsement: Required for vehicles containing hazardous materials. Requires a written knowledge test.
    N Endorsement:
Permits you to operate tank vehicles. Requires an additional written knowledge test.
    P Endorsement:
Allows you to operate a vehicle that carries over a specified number of passengers (the exact number may depend on your state). Requires written knowledge AND road skills tests.
    S Endorsement:
Permits the operation of a school bus. Requires written knowledge AND road skills tests.
        ALSO requires separate application forms, fees, and background checks. See our guide to passenger and school bus endorsements.
    T Endorsement:
Allows you to tow a double or triple trailer. Requires an additional knowledge test.
    X Endorsement:
Combination endorsement for HAZMAT and tank vehicles. Requires a written knowledge test.
    E Restriction:
Prohibits you from operating vehicles with a manual transmission. Occurs when you take your skills test in a C.M.V. with automatic transmission.
    L Restriction:
Prohibits operation of a vehicle containing a full air brake system.
        Occurs if you:
            Fail the Air Brakes Knowledge Test.
            Incorrectly identify air brake system components.
            Fail to properly conduct an air brakes system check.
            Take the road skill test in a C.M.V. lacking a full air brake system.
    Z Restriction:
Also prohibits you from driving a C.M.V. with full air brakes. Occurs if you tested in a vehicle with an air over hydraulic brake system.
    M Restriction:
Restricts you to operating a Class B or C passenger vehicle/school bus ONLY. Occurs if you possess a Class A CDL, but earned your passenger/school bus endorsement driving a Class B vehicle.
    N Restriction:
Restricts you to operating a Class C passenger vehicle/school bus ONLY. Occurs when you possess a Class B CDL, but earned your passenger/school bus endorsement driving a Class C vehicle.
    Restriction:
Prohibits you from driving any Class A vehicle that has a fifth wheel connection. Occurs when you take your skills test in a C.M.V. that has a non-fifth wheel connection, such as a pintle hook.
    V Restriction:
Indicates that a medical variance has been reported by the Federal Motor Carrier Safety Administration (F.M.C.S.A.). This may occur, for instance, if you have a vision or diabetic waiver issued by the F.M.C.S.A.