My upsee general rank is 40612 and sc rank 2728 in b.tech can i get government college by sc rank?

Yes for sure, but you might not be able to get CSE but you can get other branches like ECE, EEE Mech or Civil and if you want CSE you can also look for the top private engineering colleges of upsee,

• Ajay Kumar Garg engineering college
• Galgotias college of engineering and technology
• JSS, Noida
• ABES
• KIET

Though the counseling process hasn't started yet till then you can predict what colleges you might get with this rank with the help of Upsee college predictor and can also check previous years cutoffs of different colleges for different branches
https://engineering.careers360.com/upsee-college-predictor
Good Luck