Projection welding is a variation of ... welding

a) hammer b) forge c) spot d) ultrasonic

You can obtain the perfect... when the surfaces of the material are clean.

a) weld b) separation c) combination d) fusion

Aluminium alloys are used in many applications in which the combination of... strength and low weight is attractive.

a) low b) high c) tensile d) partial

Modern electronics allows a... ignition.

a) rapid b) fast c) contactless d) difficult

9. The resistance causes... which melts the metals and creates the weld.

a) solidification b) cold c) current d) heat

Thermit welding was invented in....

a) Ukraine b) Australia c) Germany d) Russia

14. Rearrange the words to make sentences:

1) known process oxyacetylene oxyfuel welding welding also is as

2) jewelry used precision water is of for welding torch a

3) used to metal electrodes the together are clamp simultaneously two to sheets

4) two apply to metal and to on current welding relies electrodes seam sheets pressure join

5) the the welding by heat involves resistance of resistance passing current generation through

15. Make a report for students’ welding newspaper. Choose any new technical appliance. Describe its characteristics. Compare them to the old ones. Decide which is better – old or modern. Substantiate your choice.