The examination provided in Section 73-14-19 shall be selected by the board, with advice of the council, and may also include an oral examination at the discretion of the board. The tests under this section shall not include questions requiring a medical or surgical education. It is the intent of this section that the exams administered under this chapter be of such a level as to provide that at a minimum an individual having a high school education or its equivalent and with appropriate study, training and supervision under the direction of a qualified hearing aid specialist should be able to pass.