24 semester units (or 36 quarter) in accounting (educational requirements vary, contact State Board for specific details) and. 24 semester units (or 36 quarter) in business-related courses (educational requirements vary, contact State Board for details)
ATD, a division of NADA, is the recognized voice of commercial truck dealers and their premier source for advocacy, industry relations, and education. ATD membership is integral to dealers' business.
Variable-frequency drive. A variable-frequency drive (VFD; also termed adjustable-frequency drive, variable speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.