Are you preparing for the state of Ohio HVAC Test?
I recently took a course online through Exam Prep to prepare me for the test. I would have gone another route if I had to do this again. Although the exam simulates the test, the actual test is a lot more like being on the job than being in a classroom.
I think the actual test was written to test contractors on their field knowledge and experience. The pretest that I took over and over spent a lot of time going over topics like how many float days between jobs, calculating velocities in air ducts and distances between gas, exhaust and HVAC equipment and structures.