For well-thought projects filling the form will take around 15 min - just mark Yes/No and fill the fields with what you already thought of.
If it takes you more then 30 min, probably the project is missing something important. If answering a question takes you more then 1 min to think, then you need to work on this question more and when you are ready, come back here.
We ask these questions every startup from the very beginning so you need to have the answers anyway.
If you have any questions, please contact us at email@example.com.