Lokesh, 

The last year closing rank for different branches in DTU was

Outside Delhi Region

 Bio-Technology 17044

 Civil Engineering 10207

 Computer Engineering 3070

 Electrical Engineering 7346

 Electronics and Communication Engineering 5526

 Engineering Physics 9630

Environmental Engineering 17000

 Information Technology 3733

6 Mathematics and Computing 4816

 Mechanical Engineering 7934

Mechanical Engineering with Specialization in Automotive 8410

Polymer Science and Chemical Technology 16663

 Production and Industrial Engineering 15358

 Software Engineering 4214

So this is the rank you need to score in Jee Mains or even better rank to get DTU. 

Hope it helps