27 Profs Reveal. 291 Exam Problems With Step-By-Step Solutions. Circuits, Networks, Transient Analysis, Complex Frequency, 2-Port Networks, State Variables, Fourier, and Laplace. The Exam File Series are actual midterms and finals from teaching professors around the country. In each exam file you will find excellent review problems with the professor's own solution. Many of these are short and of the type used on the FE/EIT exams. Many students use these in their class studies and when preparing to take the FE exam. All books are 8-1/2x11 format.