Handling of fuels and lubricants used when working with motor vehicle engines.

Schools have built and run small engine test beds to allow study of torque: speed characteristics and fuel consumption. These typically use a small lawn-mower engine but much smaller systems have used model aircraft engines.

Using a powered mixer to mix mortar or concrete for use.

The creation of a joint between either the faces of sheet metal components or between wires and terminals using molten solder with a flux.