Test battery charges, and replace or recharge batteries as necessary.
Test equipment for overheating, using speed gauges and thermometers.
Inspect and test equipment to locate damage or worn parts and diagnose malfunctions, or read work orders or schematic drawings to determine required repairs.
Measure velocity, horsepower, revolutions per minute (rpm), amperage, circuitry, and voltage of units or parts to diagnose problems, using ammeters, voltmeters, wattmeters, and other testing devices.
Test electrical circuits or components for proper functioning.
Test mechanical equipment to ensure proper functioning.