No they’re not rude at all. Don’t be afraid of them. They just want genuine students to get a visa so try to be as strict as possible in this matter. They are kind enough to give you a visa if you are genuine student who has an intention to enter USA for study purpose.

1. What is the reason for my USA student visa rejection?
2. Why do you want to go to USA?
3. How can I get visa to study ACCA in UK and what is the minimum fee required?
4. Where did you get this university from?
5. How easy is it to go to the US as a dependent of a student?
6. Why have you decided to study now after two years gap?
7. How can I apply for permanent residency in USA after completing my graduation from an US university?
8. When can I start to work with settlement visa in UK?
9. What should I say if they ask me who will take care of me in USA?
10. What should I say if they ask me why I want to do MBA?
11. What to say if the visa officer asks about importance of MBA?
12. What will be the visa chance if I want to do simple diploma course after B. Tech?
13. Why are you going to study in USA when this course is available at your own country?
14. Why did you select this university?
15. What are the financial documents required to apply for F1 visa?