Shift 2 regarding engineering means that they are telling you about the evening shift as the second shift means evening shift and this shift is basicaly meant for those who have scored less rank as per the eligibility criteria for the college.
The timmings are also differ frik the morning shift batch in some of the colleges. And the difference is around for 2-3 hours only. And there is no harm in taking admission in second shift.
I hope this helps you out. All the best have a great future ahead.

Hi,
Be more specific about your question as different colleges have  different shifts if you will mention that particular college so maybe we can help you out easily.
Thanks