oh boy...
...the FE and the EIT are the same test. Technically I think the exam is called the FE exam (Fundamentals of Engineering), an EIT (Engineer-in-Training) is what you become after you pass the FE exam. So the term FE and EIT has become kind of an interchangeable term for the exam.
The FE/EIT exam is broken up into a morning and afternoon portion. Each portion is 4 hours long. The morning session is comprised of "general" engineering questions. They will be questions that an engineer from any field should be able to answer. In the afternoon you have a choice of which exam you choose. There are several disciplines to choose from (I can't remember all of the, I think there is Civil, Mechanical, Electrical, etc.) or you can take a General afternoon exam. The discipline specific exams will obviously be geared towards subjects related towards that discipline, the general afternoon exam will have a broad range of topics (much like the morning exam, but more in depth).