Engine 2014: Electricity

1. A where the wire braid is used as a heat sink during soldering operations
2. B where the wire braid is used to suck up the melted solder when disordering a joint
3. C where the wire braid is used to bridge across a crack in the printed wiring to correct an open circuit
4. D under no circumstances is wire braid to be used on a printed circuit board

Tip: press A-D to answer