I heard you can burst a project by asking questions, if they are hiding something they won't be able to answer all questions thrown at them, is this true?
Yes, you can choose to ask them reasonable questions till they have no prove for it, that is if you also know it well and you're well convinced about what you know.
No, because some of those fake project have the knowledge even more than you and they are ready to provide you with answers to every of your questions, even though some might be lies and wrong answer unknowingly to you.
What questions can one ask a project dev or team to know if they are up to something good or bad?
My best answer and recommendations on this is to carry your own research all by yourself. and am going to list you the items to be on a look for
1. Name and sponsors of the project
2. Registration details
3. Site domain address and physical office location
4. History of past projects
5. liquidity and market cap for the project
6. purpose for the project
7. ICO, ROI
8. Online reviews
9. Policy and privacy statement
10. Run a check on their web using "scan a web" or any other recommended web checker.