Answer any three of the following: (i) Name tool A shown and give one use for this tool - Leaving Cert Engineering - Question c - 2022

Spot welding is generally suitable for lighter gauge materials. When dealing with heavy gauge steel plates, the heat generated by the spot welder may not be sufficient to effectively melt the materials together. The joint may not achieve the necessary strength because the spot welder would not create a strong enough weld nugget, resulting in weak joins that could fail under stress.

A sweated joint occurs when two pieces of metal are joined together using solder. This method involves heating the metals to a temperature that allows the solder to flow and create a bond between them. An example of where a sweated joint might be used is in plumbing, specifically when joining two copper pipes together.

One advantage of using thumb screws is that their knurled surfaces allow for easy hand tightening without the need for any tools, making assembly and disassembly quick and convenient.