Hi Dear, KEAM exam doesn't have any dress code but you have to wear simple and sobber cloths.Before KEAM you have to qualify for NEET exam if you want to take admission in the medical field and NEET has dress code system.

if you want to know more about KEAM then check it out given link :
https://engineering.careers360.com/articles/keam

if you want to know more about NEET exam dress code then check it out given link :
http://www.neet2017.in/dress-code-neet-2018/

thank you