1. Specify which types of sockets the article mentions, together with their uses and differences.
2. According to the article, what signs imply a faulty socket?
3. Why is an electric arc necessarily not an indication of a faulty socket?
4. How can you maintain your sockets and plugs in good condition, and how can you prevent them from getting damaged?
5. Edit the statement so that it is true: "There is no electricity in an empty socket."
