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

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

Install and repair industrial and commercial refrigerating systems.

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

Diagnose, adjust, repair, or overhaul small engines used to power lawn mowers, chain saws, recreational sporting equipment and related equipment.

Repair and adjust electrical and mechanical equipment of boat engines.

Diagnose, adjust, repair, or overhaul railroad rolling stock, mine cars, or mass transit rail cars.

Diagnose, adjust, repair, or overhaul mobile mechanical, hydraulic, and pneumatic equipment, such as cranes, bulldozers, graders, and conveyors, used in construction, logging, and surface mining.

Diagnose, adjust, repair, or overhaul farm machinery and vehicles, such as tractors, harvesters, dairy equipment, and irrigation systems.

Repair automobiles, trucks, buses, and other vehicles. They master mechanics repair virtually any part on the vehicle or specialize in the transmission system.