There are three classes of CDL -
Class A: Commercial vehicle combinations with a Gross Combination Weight Rating of 26,001 lbs. or higher, in which the vehicle in tow (trailer) has a weight rating of greater than 10,000 lbs.
Class B: Single commercial vehicles with a Gross Vehicle Weight Rating of 26,001 lbs. or higher. Additionally, a Class B CDL holder may also pull a trailer with a weight rating of no more than 10,000 lbs.
Class C: Used for vehicles or combinations with a weight rating of 26,000 lbs. or less. Even though vehicles under 26,001 lbs. don't usually require a CDL, they do require one when they're carrying hazardous materials, or are buses designed to transport more than 15 persons (including the driver).
Yes.
No
Yes
No.
Yes
A valid drivers license and a DOT medical card.
Commercial Drivers Licence, Restricted Drivers Licence
To get a commercial drivers license, unfortunately for you, you must be 21 years old. It seems you have a while to wait, but maybe you can work on a career plan while you are waiting.
A commercial drivers license is a drivers license to drive vehicles which have a vehicle weight rating of 26,001 lb or more for commercial use, or transports quantities of hazardous materials. It is also required for vehicles that are designed to transport 16 or more passengers, including the driver You can locate more information regarding a CDL (commercial drivers license) at www.fmcsa.dot.gov/registration-licensing/cdl/cdl.htm.
To see a sample commercial drivers license test, go to the forums that people have these discussions. Links are always present there to find old ones available.
No. Federal states that if you have a CDL in one state, you cannot have any other drivers license in any other state.
Mexico has its own license classification system. Commercial truck drivers do have to upgrade their license.