Knowledge of machines and tools, including their designs, uses, repair, and maintenance; this includes the ability to operate, calibrate, tune, and synchronize, and perform a complex rapid adjustment on equipment, machinery, and tools such as motor vehicles, motorized equipment, mechanic tools, drill press, welder, hydraulic press, battery tester, steam cleaner, power washer, and/or related materials used in performing essential functions . Ability to recognize and identify individual characteristics of colors and odor to determine the condition of fluids, shapes to distinguish objects clearly, sounds to determine if the equipment is operating correctly, track down malfunctions, and textures to detect wear .