Fed criminal jury duty, as long as you aren’t cut right away you’ll be there until lunch at least unless it’s a smaller gun case. That’s southern district so I may not be completely correct but in EDTX we usually have a pool of 50-60, most judges do their introductions and then it can vary from their. If you have an organized judge, they’ll usually lead the first part, asking the general questions and then usually both sides get their equal time to ask questions. In EDTX the normal timeframe is seating the 14 jurors and then releasing the rest and then a late lunch, followed by openings and if time, the first witness. While you don’t have to, wear a sports coat over a polo at least… leave your phone in the car. You can bring a book but at the federal level it’s 1 trial, 1 jury pool. If you really don’t want to be on the juror, answer a lot of questions. The more you talk, the more you make yourself known and less desirable. Also be an engineer or elementary teacher. Or a commercial pilot on white collar tax cases.