Refrigeration Pre-exam HVAC 9039 Exam Preparation Email to a Friend Our Refrigeration Pre-exam course is a review/refresher course intended for those who have acquired the theoretical and practical knowledge required to write the Certificate of Qualification exam for the Refrigeration and Air Conditioning Systems Mechanic (313A) licence. Contact Information 416-415-5000, ext. 4861 firstname.lastname@example.org Course Section(s) Available Class dates and registration for the upcoming year (September 2017 to August 2018) will be available on this website in early July 2017. Please visit this page again at that time. Some courses require you to purchase a textbook. The cost of the textbook is not included in the course fee unless otherwise indicated. If there is a textbook assigned for this course, it will be listed on the bookstore website.