21. Make a comparison of welding, adhesive joining, and
mechanical fastening in regard to bond strength and service
temperature limitations.
22. List four basic types of fusion welds, and draw sketches.
23. Lis any three defects associated with fusion welding, and
describe them briefly.
24. Draw a sketch of weld section, and label three zones; namely:
base metal, weld metal and heat affected zone.
25. Define power density and include its units, and describe how
power density affects size of...