Use your knowledge of welding processes and the words you have learned and match the terms with their definitions

1) outfit	a) the process of burning something
2) valve	b) an elastic device, typically a helical metal coil, that can be pressed or pulled but returns to its former shape when released, used chiefly to exert constant tension or absorb movement
3) spring	c) an apparatus that burns with a hot flame for welding, brazing, or soldering
4) hose	d) a complete set of equipment needed for a particular purpose
5) combustion	e) a pipe made of rubber or plastic, along which a liquid or gas flows
6) adjustment	f) material that is burned to produce heat or power
7) torch	g) a device for controlling the passage of fluid through a pipe or duct
8) fuel	h) a small change that is made to something such as a machine or a way of doing something

Use your knowledge of welding processes and information from the previous units and decide what welding processes are defined below.

1. … is a technique in which metal is welded by heat generated by an electric arc struck between two electrodes or between one electrode and the metal workpiece

2. … is a method of welding in which a combination of gases, usually oxyacetylene, is used to provide a hot flame.

3. … is a welding technique in which the parts to be joined are held together under pressure and heat is produced by passing a current through the contact resistance formed between the two surfaces.