JNTUH - Jawaharlal Nehru Technological University, Hyderabad

If you are OC, the cut off will be below 300 rank. The caste reservation follows as per the rules of the ICET.
However, the number of seats is 40 (but I didn't see all the seats getting filled in my seniors' batch or my batch or juniors' batch or sub-juniors; batch).
You might get admission there.
Good luck.

Yes you can. If you have a valid certificate to prove your category, you can avail it.

There is no cutoff for admission in this institutions .
.please visit the link below to get more detailed information . The admission is based on entrance exams and candidate should have 50% above in 12th .https://www.shiksha.com/university/jawaharlal-nehru-technological-university-hyderabad-22358/admission#

Cutoff of 2016 in TEAMCET for admissions in JNTU
Chemical Engineering
Closing Rank - 30072
Civil Engineering
Closing Rank - 12527
Computer Science & Engineering
Closing Rank - 8487
Electronics & Communication Engineering
Closing Rank - 10535
Electrical & Electronics Engineering
Closing Rank - 11425
Mechanical Engineering
Closing Rank - 12866
Metallurgical Engineering
Closing Rank - 32783 .
Hope it helped.

For admission in industrial safety it is mandatory to have B.E. / B.Tech.
Candidate may also have obtained a Degree in science with Physics or Chemistry and relevant practical experience in a supervisory capacity for a period of not less than one year or may also have obtained a Diploma in any branch of engineering or technology and relevant practical experience in a supervisory capacity for a period of not less than two years.