Engineering

Chandresh Agarwalla is the best and most popular textbook for the electrical engineers.

The admission in Annamalai University for engineering courses is done through TNEA. The admission window is closed now. And I have found nothing about management quota in Annamalai University. So, you should contact the college to see if they have any vacancies.

The admission at UCEOU is provided on the basis of GATE score and result in TS PGECET.
https://www.shiksha.com/engineering/course/amp/m-e-in-water-resources-engineering-university-college-of-engineering-osmania-university-osmania-university-hyderabad-287977
The forms are available on the website. This

This chttps://www.jmi.ac.in/aboutjamia/departments/Civil-Engg/courses-name/MTechEnvironmental_Science_and_Engineering_Part_time-265/1.
Also, check this list to check all regular and part time courses provided by JMI.
Link: https://www.jmi.ac.in/studyatjamia/courseslist.

Yes, it is possible.

The online admissions are over now, but offline admissions are still going on in many colleges.

Pursue regular B.Tech from a local but recognised college. Tell them you won't be able to attend classes and you will only give exams. That is the only method that works for getting a B.Tech degree. But remember, a person becomes an engineer because of his skill. Private companies will see through y

JNU offers M.Tech in computer Science and electrical engineering.

Not, yet. Wait for the HEERA to be implemented. Wait for Delhi High Court order on Distance Technical Education. But right now, such courses don't have any recognition.