Hello aspirant,

It's good that you are preparing for Airforce Y group. It's always advisable to give mock test before sitting in actual examination. The official website where you can find syllabus and model paper is-

https://airmenselection.cdac.in/CASB/modalqp.html

You can also appear in mock tests available on different sites like Testbook and GradeUp.

Hope it helps you..

Best of luck..