For some folks the required training can be boring. By this I mean things like compliance-type training required by many larger companies. For example, training on proper security practices for electronic devices. While important, it's often dry and repetitive.
Douglas Lemmo, P.E.
You ask an odd question since everybody is different what might be boring to one person wouldn't be boring to another. I have been a mechanical engineer for over 40 years doing a variety of jobs and I can say I can't think of anything boring I have done. Some tasks may be more difficult than others, and some might be more intreresting than otheres, but I guess that I have been blessed in that I haven't had any boring jobs. There has always been something that captured my imagination or interest. I suggest that at your age, you not focus on or worry about being bored but instead focus on what you find interesting and exciting and then get a job doing those things. You have heard the old saying, "If you love what you do, you will never work a day in your life". It is true .
Good luck and keep woking on discovering what really interests you.
When I travel to bring products up for production, there can also be a lot of down time. I have had several days of just sitting around a tooling shop waiting for the changes to be made and have the next test shot.
David C’s Answer
Another thing I found boring were management meetings and general staff meetings that were conducted by a manager that was not very good at conducting meetings, especially productive meetings. You have a feeling of losing valuable time when a meeting is not productive.
Fortunately, there are far more interesting and challenging areas to the career that puts the boring tasks behind me.