Part 1a) Before you touch the soldering iron to what you’re about to solder, you must to a few things. Turn it on to 350 degrees and wait for it to warm up in the holder. Make sure to have a wet sponge nearby to clean off you soldering iron with when it gets dirty, and clean it off before you start to use it.
Part 1b) Before you step away from the soldering iron, make sure it’s turned off and left in the holder. Make sure that your sponge is wet or damp for the next person. The wire should be left nearby and made neat for the next person.
Part 2a) You should always check where the red wire is plugged into on the multimeter because the position changes depending on what you are measuring.
Part 2b and Part 3)