Some departments have an established core of professors who conduct exams .
If this is the case with your department, you should still meet with those professors and glean as much information from them as possible. Many departments, particularly those in the humanities, require that you assemble your own committee . The readers of your exams may or may not get along with one another. You may or may not get along with the readers of your exams. They may or may not be helpful to you during the studying process.