Etching zinc or copper plates for intaglio printing using dilute nitric acid.

The design and construction of items which will be connected to the mains supply where the use of electricity is peripheral or fundamental (eg, low-voltage power supplies for electronics).Instruction in the repair and maintenance of equipment.The construction of electronics circuits from prepared modules or components.

The use of domestic-type freezers and refrigerators for freezing raw and cooked foods.

Defrosting foods that are precooked and defrosting food that is to be cooked.