Plumbing and electricians are very studious.

Plumbing installation is relatively simple and easy to learn, mainly because it requires enough physical strength. This industry is more suitable for young and middle-aged men, not for people who are in poor health or over 40 years old. Plumbing installation requires perforated wiring pipes, and you can basically learn it as long as you pay attention to the calculation size and installation method.

Electricians should master rich theoretical knowledge, understand various electrical principles and be familiar with some basic common sense. Moreover, being a good electrician needs rich experience, especially when dealing with some power failures, only rich knowledge and experience can solve them well, so there are many basic knowledge of electricians, and it is not so easy to become an electrician.