Repair, install, adjust, or maintain industrial production and processing machinery or refinery and pipeline distribution systems.

Lubricate machinery, change parts, or perform other routine machinery maintenance.

Repair, adjust, or install all types of electric or gas household appliances, such as refrigerators, washers, dryers, and ovens.

Install and repair industrial and commercial refrigerating systems.

Operate power pumps and auxiliary equipment to produce flow of oil or gas from wells in oil field.

Operate underground loading machine to load coal, ore, or rock into shuttle or mine car or onto conveyors. They use loading equipment which may include power shovels, hoisting engines equipped with cable drawn scraper or scoop, or machines equipped with gathering arms and conveyor.

Control and monitor biomass plant activities and perform maintenance as needed.

Install, service, or repair heating and air conditioning systems in residences or commercial establishments.

Install, repair, and maintain mechanical regulating and controlling devices, such as electric meters, gas regulators, thermostats, safety and flow valves, and other mechanical governors.

Repair and replace tires.