# Tasks & work activities — chilling operator

Source: O*NET 30.3, occupation 51-9193.00 (Cooling and Freezing Equipment Operators and Tenders).

## Task statements

- **[Core]** Monitor pressure gauges, ammeters, flowmeters, thermometers, or products, and adjust controls to maintain specified conditions, such as feed rate, product consistency, temperature, air pressure, and machine speed.
- **[Core]** Record temperatures, amounts of materials processed, or test results on report forms.
- **[Core]** Read dials and gauges on panel control boards to ascertain temperatures, alkalinities, and densities of mixtures, and turn valves to obtain specified mixtures.
- **[Core]** Correct machinery malfunctions by performing actions such as removing jams, and inform supervisors of malfunctions as necessary.
- **[Core]** Start machinery, such as pumps, feeders, or conveyors, and turn valves to heat, admit, or transfer products, refrigerants, or mixes.
- **[Core]** Assemble equipment, and attach pipes, fittings, or valves, using hand tools.
- **[Supplemental]** Adjust machine or freezer speed and air intake to obtain desired consistency and amount of product.
- **[Supplemental]** Scrape, dislodge, or break excess frost, ice, or frozen product from equipment to prevent accumulation, using hands and hand tools.
- **[Supplemental]** Weigh packages and adjust freezer air valves or switches on filler heads to obtain specified amounts of product in each container.
- **[Supplemental]** Stir material with spoons or paddles to mix ingredients or allow even cooling and prevent coagulation.
- **[Supplemental]** Start agitators to blend contents, or start beater, scraper, and expeller blades to mix contents with air and prevent sticking.
- **[Supplemental]** Measure or weigh specified amounts of ingredients or materials, and load them into tanks, vats, hoppers, or other equipment.
- **[Supplemental]** Load and position wrapping paper, sticks, bags, or cartons into dispensing machines.
- **[Supplemental]** Insert forming fixtures, and start machines that cut frozen products into measured portions or specified shapes.
- **[Supplemental]** Place or position containers into equipment, and remove containers after completion of cooling or freezing processes.
- **[Supplemental]** Inspect and flush lines with solutions or steam, and spray equipment with sterilizing solutions.
- **[Supplemental]** Sample and test product characteristics such as specific gravity, acidity, and sugar content, using hydrometers, pH meters, or refractometers.
- **[Supplemental]** Activate mechanical rakes to regulate flow of ice from storage bins to vats.

## Detailed work activities

- Adjust equipment controls to regulate coolant flow.
- Adjust equipment controls to regulate flow of production materials or products.
- Adjust equipment to ensure optimal performance.
- Adjust temperature controls of ovens or other heating equipment.
- Assemble electromechanical or hydraulic systems.
- Clean production equipment.
- Clear equipment jams.
- Collect samples of materials or products for testing.
- Install mechanical components in production equipment.
- Load materials into production equipment.
- Measure ingredients or substances to be used in production processes.
- Mix substances to create chemical solutions.
- Monitor equipment operation to ensure proper functioning.
- Monitor instruments to ensure proper production conditions.
- Mount attachments or tools onto production equipment.
- Notify others of equipment repair or maintenance needs.
- Operate mixing equipment.
- Operate pumping systems or equipment.
- Position containers to receive materials or workpieces.
- Record operational or production data.
- Sterilize food cooking or processing equipment.
- Test chemical or physical characteristics of materials or products.
- Weigh finished products.