Hello Rupam,

There are numerous no. Of colleges for B.Tech course in Delhi NCR region which might confuse you as each appears to be good when one sees it online through the website. So I prefer you to go out and visit the college physically once before you are going to take admission in it. If you are looking for government college and deemed to be University institutions then you have to appear for JEE Examination. If you are looking for private universities then give their respective entrance examinations or otherwise they will demand donation amount. If you want to take admission in state university affiliated colleges then give the entrance examination of respective state university. The below are some good quality colleges in Delhi NCR - 

• Affiliated with IP University 

1. Maharaja Surajmal Institute of Technology, Delhi

2. Maharaja Agrasen Institute of Technology, Delhi

3. Northern India Engineering College, Delhi

• Private and Deemed to be University -

1. Amity University, Noida

2. Shiv Nadar University, Dadri

3. Jaypee Institute Of Information Technology, Noida

• Affiliated with Dr. A. P. J. Abdul Kalam Technical University, Lucknow, Uttar Pradesh (Formerly UPTU) -

1. Galgotias College of Engineering and Technology, Greater Noida

2. G.L. Bajaj Institute of Technology and Management, Greater Noida

3. JSS Academy of Technical Education, Noida

4. Ajay Kumar Garg Engineering College, Ghaziabad

5. Krishna Institute Of Engineering and Technology, Ghaziabad

6. ABES Engineering College, Ghaziabad