Epa 608 Type 2 Test Questions With Answers

Are there "drop-in" replacements for R-12 systems and if not, why? {Ans: a. There is no "drop-in" replacement gas for R-12 b. New refrigerants are incompatible with the oils and lubricants used in R-12 c. 134A uses a different oil than R-12 d. All the above}58.Why is it important to have faster recovery? {Ans: Taking longer increases chance of emissions of the refrigerants to the atmosphere}What must be done to a cylinder (disposable or refillable) before scrapping it? {Ans: Completely evacuated of all refrigerants and have a pressure of 0 psig or lower}How should you handle recovery of a system that has mixed refrigerants? {Ans: Recovery Into A separate tank}Why is it necessary to dehydrate a refrigeration system? {Ans: Remove water and water vapor contaminating the system}Why shouldn't you fill cylinders above 80% of their capacity by weight? {Ans: Overfilled cylinders may rise in internal pressure when exposed to heat, resulting in an explosion}