EPA 608 EXAM 2023/2024 NEW UPDATE!! (200+ QUESTIONS AND VERIFIED ANSWERS) 100% CORRECT ANSWERS

EPA 608 EXAM 2023/2024 NEW UPDATE!! (200+ QUESTIONS AND VERIFIED ANSWERS) 100% CORRECT ANSWERS 1. What is the effect of low ambient temperature on the time required to complete a recovery of refrigerant? ~ Answer: Increases recovery time. 2. Technicians must explain to customers that recovery is necessary and it is required by law. What else should the technician tell the customer? ~ Answer: That all service personnel are duty bound to follow the law and protect the environment. 3. What is different about any leaks in systems charged with a blended refrigerant? ~ Answer: Because they are blended the ingredients will leak at different rates. 4. What is "temperature glide"? ~ Answer: A family of lines depicting pressure versus temperature curve. 5. What is ternary blend? ~ Answer: A blend of three different refrigerants. 6. How should systems using blended refrigerants be charged? ~ Answer: In liquid form into the high side of the system. 7. Is there a "drop-in" refrigerant for CFC-12? ~ Answer: No. 8. How do you leak check an HFC-134a system with a partial charge (no HFC-134a detector available)? ~ Answer: Recover the remaining 134a and then pressurize the system with nitrogen and a trace charge of R-22 so you can use an HCFC electronic leak detector. 9. What is the preferred oil to be used with HFC-134a? ~ Answer: Ployolester. 10. Can ester based oils be mixed with other oils? ~ Answer: No. 11. What does "hygroscopic" mean? ~ Answer: Oil that absorbs moisture easily. 12. What lubricant is recommended for use with a ternary blend? ~ Answer: Depends on the blend: For HCFC's-Alkylbenze For HFC's-Ployolester. 13. Safety glasses and butyl-lined gloves should be worn for what procedures? ~ Answer: When operating recovery or recycling devices and when handling and refilling refrigerant cylinders. 14. What safety component must be used whenever dry nitrogen is used to pressurize a system? ~ Answer: Pressure regulator. 15. Safety rules for technicians such as: no open flame or hot steam near a refrigerant ~ Answer: never cutting or brazing a charged refrigerant line and never using oxygen to purge or pressurize lines are all important. Which one should a technician follow? All of them. 16. What is a Material Safety Data Sheet? ~ Answer: A sheet the states the safety ratings and precautions to be taken for use and handling of chemicals. 17. What safety classification within the ASHRAE standard is the most safe? ~ Answer: A1. 18. What is caused by tie inhaling of refrigerant vapors? ~ Answer: Heart irregularities or Asphyxia. 19. What is the major causes of death involving refrigerants? ~ Answer: Oxygen deprivation. 20. What breathing problem can be caused by CFC-12? ~ Answer: Asphyxia. 21. How can ice be removed from a sight glass? ~ Answer: With alcohol spray. 22. What must be done with a badly corroded relief valve? ~ Answer: It must be replaced. 23. Where can you find the allowable test pressure on a system? ~ Answer: Unit data plate.