Deloitte USI how do we get assigned projects?

Hello, I am a new hire currently in Hyderabad office in Deloitte USI in Consulting, specifically in Strategy and Analytics.

I had a doubt about projects. How do we get assigned projects? I have been told that internal projects aren't good. How do we identify which projects are internal? Also if we don't get a project do we stay in bench? How long is there a time limit to stay in bench?

Please help me understand this🙏🏼