HELLO,

For admission to a Civil Engineering Diploma after the 10th grade you will generally need to meet these criteria :-

1.You must have passed the 10th class board examination or and equivalent from a recognized board with Physics, Chemistry and Mathematics as compulsory subjects

2.Secure at leat 50 percent marks in aggregate in the qualifying examination. A 5% relaxation might be offered to reserved categories

3.Candidates might need to demonstrate physical fitness without disabilities and no color blindness.

Refer to this link for more help:- https://engineering.careers360.com/articles/diploma-in-civil-engineering-after-10th-counar

Hope this Helps!