These may be visits to a business, a farm, a factory or some other place where you may see applications of the work you are studying. Trips may be held during class time or in specified field trip days, notified in the semester lecture timetable.
Tours are of longer duration and many are held during vacations.
The fee charged for trips is the final amount payable by students. A tour fee is never known precisely until after the tour is completed. As a consequence an interim fee is charged at the beginning of the year for each tour and adjustments made later. The interim tour fee charged is decided by the examiner of the individual subject. As the interim fee is set many months in advance, it is inevitable that actual costs will differ from that interim fee charged.