A professional who tends machine that washes, rustproofs, and dries metal parts used in air-conditioners. Respnsibilities include:

• Turns valves to activate spray washers.
• Reads dial instruments and turns valves to adjust pressure.
• Observes machine operation and loads conveyor line hooks with parts which are then degreased, rinsed, coated with rustproof film, and dried in oven.
• Tests solutions in tanks by placing few drops in test tubes or pipettes, applying chemical reagents and observing reaction of test sample.
• Strengthens or dilutes solution as necessary.
• May perform same tasks on parts used in manufacture of oil burners.