The term balun (pronounced bal-un) is derived from the function of the passive device that converts between a BAL anced and UNbalanced electrical signal. Common types of baluns convert 100 Ohm twisted pair (balanced) to 75 Ohm coaxial (unbalanced).
Commercial Driver License (Class A, B or C) A commercial driver license (CDL) is required for drivers of heavyweight vehicles, 26,001 lbs. or more gross vehicle weight rating (GVWR), vehicles hauling a trailer that is 10,001 lbs.
1 Class A, B and C non-commercial licenses are issued to all drivers for personal or recreation use. 2  The majority of Maryland drivers apply for a Class A drivers license which pertains to any vehicle used for personal activity.3  Class M-Allows the driver to operate a motor vehicle.here are separate written tests for each type of non-commercial licenses in Maryland and the amount of questions on the exam will depend on the license being applied for. Class A and B licenses are 20 question tests while the Class M consists of 25.