||Musical Instrument Repairers and Tuners
- Play instruments to evaluate their sound quality and to locate any defects.
- Inspect instruments to locate defects, and to determine their value or the level of restoration required.
- Compare instrument pitches with tuning tool pitches to tune instruments.
- Strike wood, fiberglass, or metal bars of instruments, and use tuned blocks, stroboscopes, or electronic tuners to evaluate tones made by instruments.
||Signal and Track Switch Repairers
- Install, inspect, maintain, and repair various railroad service equipment on the road or in the shop, including railroad signal systems.
- Inspect switch-controlling mechanisms on trolley wires and in track beds, using hand tools and test equipment.
- Test air lines and air cylinders on pneumatically operated gates.
||Electric Motor, Power Tool, and Related Repairers
- Inspect and test equipment to locate damage or worn parts and diagnose malfunctions, or read work orders or schematic drawings to determine required repairs.
- Test equipment for overheating, using speed gauges and thermometers.
||Farm Equipment Mechanics and Service Technicians
- Reassemble machines and equipment following repair, testing operation and making adjustments as necessary.
- Examine and listen to equipment, read inspection reports, and confer with customers to locate and diagnose malfunctions.
- Disassemble timepieces and inspect them for defective, worn, misaligned, or rusty parts, using loupes.
- Test timepiece accuracy and performance, using meters and other electronic instruments.
- Inspect and test docks, ships, buoyage systems, plant intakes or outflows, or underwater pipelines, cables, or sewers, using closed circuit television, still photography, and testing equipment.
- Carry out non-destructive testing, such as tests for cracks on the legs of oil rigs at sea.
||Medical Equipment Repairers
- Inspect and test malfunctioning medical or related equipment, following manufacturers' specifications and using test and analysis instruments.
- Test, evaluate, and classify excess or in-use medical equipment and determine serviceability, condition, and disposition, in accordance with regulations.
||Bus and Truck Mechanics and Diesel Engine Specialists
- Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
- Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.
||Control and Valve Installers and Repairers, Except Mechanical Door
- Test valves and regulators for leaks and accurate temperature and pressure settings, using precision testing equipment.
- Examine valves or mechanical control device parts for defects, dents, or loose attachments, and mark malfunctioning areas of defective units.
||Manufactured Building and Mobile Home Installers
- Inspect, examine, and test the operation of parts or systems to evaluate operating condition and to determine if repairs are needed.
- Open and close doors, windows, and drawers to test their operation, trimming edges to fit, using jackplanes or drawknives.
||Industrial Machinery Mechanics
- Observe and test the operation of machinery or equipment to diagnose malfunctions, using voltmeters or other testing devices.
- Examine parts for defects, such as breakage or excessive wear.
||Camera and Photographic Equipment Repairers
- Test equipment performance, focus of lens system, diaphragm alignment, lens mounts, or film transport, using precision gauges.
- Examine cameras, equipment, processed film, or laboratory reports to diagnose malfunction, using work aids and specifications.
||Coin, Vending, and Amusement Machine Servicers and Repairers
- Inspect machines and meters to determine causes of malfunctions and fix minor problems such as jammed bills or stuck products.
- Test machines to determine proper functioning.
||Mobile Heavy Equipment Mechanics, Except Engines
- Operate and inspect machines or heavy equipment to diagnose defects.
- Overhaul and test machines or equipment to ensure operating efficiency.
||Aircraft Mechanics and Service Technicians
- Test operation of engines and other systems, using test equipment, such as ignition analyzers, compression checkers, distributor timers, or ammeters.
- Measure the tension of control cables.
||Home Appliance Repairers
- Observe and test operation of appliances following installation, and make any initial installation adjustments that are necessary.
||Wind Turbine Service Technicians
- Inspect or repair fiberglass turbine blades.
||Electrical and Electronics Repairers, Commercial and Industrial Equipment
- Set up and test industrial equipment to ensure that it functions properly.
||Computer, Automated Teller, and Office Machine Repairers
- Operate machines to test functioning of parts or mechanisms.
- Reassemble and test subassembly units.