EPA 608 – core exam 2024

EPA 608 – core exam 2024 Which of the following refrigerant has a GWP of "1"? A) R-22 B) R-1233zd C) R-410A D) R-134a - Answer ️️ -B) R-1233zd The molecule found in CFCs and HCFCs that depletes O-Zone is: A) Fluorine B) Chlorine C) Hydrogen D) Carbon - Answer ️️ -B) Chlorine Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for; A) disposable cylinders B) recovery cylinders C) one pound cans D) accumulator cylinders - Answer ️️ -A) disposable cylinders The condenser __________________________. A) Changes a high-pressure vapor to a high-pressure liquid. B) Changes a low pressure liquid to a low pressure vapor. C) changes a low-pressure vapor to a low-pressure liquid. D) changes a high-pressure liquid to a low-pressure liquid. - Answer ️️ -A) Changes a high- pressure vapor to a high-pressure liquid. An ozone molecule contains; A) Four oxygen atoms B) Three oxygen atoms C) Two oxygen atoms D) One oxygen atom - Answer ️️ -B) Three oxygen atoms. The low-side test-pressure data-plate valve should be used by a technician to determine a safe pressure for: A) refrigerant charging B) leak testing. C) recovering refrigerant D) retrofitting a system - Answer ️️ -B) leak testing. HCFCs contain; A) hydrogen, fluorine, and olefin B) hydrogen, chlorine, fluorine, and carbon C) chlorine, fluorine, and carbon D) hydrogen, fluorine, and carbon - Answer ️️ -B) hydrogen, chlorine, fluorine, and carbon. Reusable refrigerant containers under high-pressure must be hydrostatically tested how often? A) 1 year B) 3 years C) 5 years D) 7 years - Answer ️️ -C) 5 years The compressor __________________________. A) Changes a high-pressure vapor to a high-pressure liquid. B) Changes a high-pressure liquid to a low pressure liquid. C) changes a low-pressure vapor to a high-pressure vapor. D) Changes a low-pressure liquid to a low-pressure vapor. - Answer ️️ -C) changes a low- pressure vapor to a high-pressure vapor. The chlorine in CFCs and HCFCs; A) Will rain out of the atmosphere. B) Will not dissolve in water. C) is heavier than air and cannot rise to the stratosphere. D) Will dissolve in water. - Answer ️️ -B) Will not dissolve in water. A single chlorine atom can destroy how many O-Zone molecules? A) 100,000 B) 10,000 C) 1,000 D) 100 - Answer ️️ -A) 100,000 A refrigerant cylinder designed to hold recovered refrigerant has a: A) Yellow body and grey top. B) Green body and yellow top. C) Grey body and yellow top. D) Orange body and grey top. - Answer ️️ -C) Grey body and yellow top. Which of the following has the highest O-Zone d