BITSAT provides M.E. Mechanical Engineering, M.E. Design Engineering and  M.E. Manufacturing Systems Engineering and to get admission in any of the above mentioned course you will have appear in BITS HD ADMISSION TEST. The forms are available around last week of April and closing date is after a month i.e. last week of May. The test has two sections, first is general (basic 12th stuff and apti) and 2 is stream oriented. For more information, you can go through the below provided link and let me know if you have any doubt -

BITSAT PG

Hope this helps!!!