The ASE A7 test has about 6 questions relating to the condenser, evaporator and related components. You will need to know how to test the condenser and evaporator for proper air flow, how to replace a condenser, and how to add oil to components. This video also shows a chart for the couplers used in R134a and R1234yf, the video also outlines the driers used in the 2 major systems. The temperature drop test is also shown.