When working on a computer which of the following best protects against ESD Why?

Answer 1

There are a set of procedures that protect sensitive components from ESD. Why? to protect the components. You can get more detail on line, but they involve keeping components and PC boards and assemblies from accumulating any static charge by keeping then electrically connected to each other and to earth ground. For example you need to solder a transistor into a circuit board. Both the transistor and the circuit board should come wrapped in conductive plastic or damage could have already occured. The operator puts conductive wrist straps on and works on a conductive surface, grounded. Connect the wrist straps to the conductive surface, as well as the soldering iron. place the plastic bags on the conductive surface to ground them. Open the bags and remove the components. Solder. Place the board back in the bag.

Answer 2

The best way to guard against ESD is to use a ground bracelet together with a ground mat. However, if you are in a situation in which you must work without one, always touch the computer case before touching a circuit board inside the case because it balances the charge between computer and Human body which is a good conductor of electricity. (CompTIA A+)

Answer 3

Ground the computer chassis to a common earth and ensure all engineers use a wrist strap connected to the chassis prior to working on the computer. This ensures the chassis and all components in direct contact with the chassis, including the engineer, maintain the same potential thus eliminating the risk of electro-static discharge.