Hello aspirant!  If I am not wrong then I think you are talking about semester examinations means you want to get good marks in iit kharagpur semester examinations. Then first of all you must attend maximum classes that you can. Getting good marks in semesters is not that difficult it's just that you have to follow a routine. Use books that are appropriate and being used by the teachers and most of the students. For this you can contact your seniors. You must keep your mid semester marks good. Because if you lack there by even 5 marks then you will be infringed of 9 pointer. Secondly you should look at the previous years question paper that what is the level of questions and what type of questions come in the examination and prepare accordingly. Always study what is in the syllabus for semesters.

See if you are probably preparing for it then go for some coaching institutes. Its a must because short tricks and tips could be taught nowhere other than that. So just go and get yourself admissioned into one such good institute. Solve previous years question and take good reference booms and study hard. You'll definitely succeed.