Many factors are considered during the review process. The most important are, applicants' previous academic record, completed courses, received degrees, overall standing, etc. Other factors include: reference letters, research area, supervisor availability, funding availability and lab space, etc.
Isfahan University of Technology establishes the minimum admission requirements common to all students. However, some departments may need additional requirements. You can get the regulation for addmission for non scholarship applicants from here.
For more information about study at IUT you can see Admission Page.