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

Repair and adjust electrical and mechanical equipment of inboard or inboard-outboard boat engines.

Diagnose, adjust, repair, or overhaul motorcycles, scooters, mopeds, dirt bikes, or similar motorized vehicles.

Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.

Repair and service bicycles.

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

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

Repair and refinish automotive vehicle bodies and straighten vehicle frames.

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

Repair, test, adjust, or install electronic equipment, such as industrial controls, transmitters, and antennas.