No, not all private aerospace engineering colleges accept the same entrance exam. Different colleges have their own preferred entrance exams. Some colleges accept national exams like JEE Main, while others have their own specific exams, such as SRMJEEE for SRM University, VITEEE for VIT University, and BITSAT for BITS Pilani. Additionally, AME CET is required for aviation and aerospace-specific courses. It's important to check the admission requirements of each college to know which entrance exam they accept.