Dear student,

In jcece btech counseling, you are allowed to participate via jee mains ranks.
Now the simple answer to your question is - YES.
You can select all the branches of one particular college.
For eg : if you select bit sindri, then you can select all the available branches during choice filling of jcece counseling. If you have a good rank in jee mains then easily you can get bit sindri.
Also you can select multiple branches of bit mesra and other colleges too.

In counseling you are always advised to select as many choices, to increase the chances of getting seat from that particular counselling.

So select all the choices in jcece counselling as per your choice and preference order.