Examination for licensure shall be conducted by the division as scheduled by the director of the department of health and offered by the board at least twice a year according to methods and in each subject field that it deems most practical and expeditious to test the applicant’s qualifications. The board may require examinations to be written or oral, or both. In any written examination, the identity of the applicant shall not be disclosed to the board until after the examination papers are graded. Written examination papers shall be preserved and available to the board for at least two (2) years.