If you are a resident of Texas and a U.S. citizen, or can provide evidence of lawful presence in the U.S., you can apply for a Texas driver's license. You have to complete an application form, providing your personal and contact information, your driver history and medical history. You also have to select which type of driver's license you want to apply for, such as a learner license, a commercial driver's license or a noncommercial driver's license. You also have to indicate the class of license you require: either A, B, C or M. A Class B license is a type of noncommercial driver's license.
TL;DR (Too Long; Didn't Read)
A Class B license in Texas is a type of noncommercial license, which authorizes you to drive a single vehicle with a gross vehicle weight rating of 26,001 pounds or more. You can also drive a single vehicle towing another vehicle or a farm trailer, and a bus with 24 or more passengers.
Class of Driver's License
In Texas, the class of the driver's license you need depends on the type of vehicle you intend to operate, the gross vehicle weight rating (GVWR) of the vehicle or the gross combination weight rating (GCWR) if you are towing a vehicle, and the number of passengers the vehicle can hold. If you have a valid Texas driver's license you may drive all vehicles in that particular class as well as all vehicles included in all lesser classes, except motorcycles and mopeds.
Class B License in Texas
With a Class B driver's license, you can drive a single vehicle with a GVWR of 26,001 pounds or more. You can also drive a single vehicle with a GVWR of 26,000 pounds or more that is towing a vehicle with a GVWR that does not exceed 10,000 pounds or a farm trailer with a GVWR that does not exceed 20,000 pounds. The final type of vehicle permitted under a Class B license is a bus with a seating capacity of 24 passengers or more, including the driver.
Other Classes of Driver's License
If you have a Class A driver's license in Texas you can drive a single vehicle with a GVWR of 26,001 pounds or more and a combination of vehicles with a GCWR of 26,001 pounds or more, provided the GVWR of the vehicles towed is in excess of 10,000 pounds.
A Class C license entitles an individual to drive a single vehicle or combination of vehicles that are not covered by Class A or Class B, a single vehicle with a GVWR of less than 26,001 pounds towing a farm trailer with a GVWR that does not exceed 20,000 pounds, and a vehicle designed to transport 23 passengers or less, including the driver. With a Class C license, you can also drive an autocycle. You need a Class M license to drive a motorcycle or moped in Texas.