EPA 608 EXAM NEW 2023/2024 UPDATE!! (More than 250 QUESTIONS AND VERIFIED ANSWERS) 100% CORRECT ANSWERS

EPA 608 EXAM NEW 2023/2024 UPDATE!! (More than 250 QUESTIONS AND VERIFIED ANSWERS) 100% CORRECT ANSWERS Q: What is the leading cause of refrigeration accidents leading to death? a. Phosgene gas inhalation b. Oxygen deprivation c. Freezing to death d. Electrocution Answer: b. Oxygen deprivation Q: What personal protective equipment should you wear when handling refrigerants? a. Safety glasses b. Butyl-lined protective gloves c. Safety shoes d. All the above Answer: d. All the above Q: What are the risks of inhaling (breathing in) refrigerants? a. Refrigerants can be deadly if inhaled or allowed to be heated b. Refrigerants inert and harmless if inhaled c. Refrigerants are only dangerous if heated d. Refrigerants can be safe if heated Answer: a. Refrigerants can be deadly if inhaled or allowed to be heated Q: What are the requirements under ASHRAE standard 15-1994? a. Requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where refrigerant (regardless of refrigerant type) from a leak will concentrate. b. Requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where R-123 from a leak will concentrate c. Requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where R-11 from a leak will concentrate d. Requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where R-12 from a leak will concentrate Answer: a. Requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where refrigerant (regardless of refrigerant type) from a leak will concentrate. Q: Under what conditions will alarm and ventilation sound under ASHRAE standard 15-1994? a. The alarm will sound before the TLV-TWA (Threshold Limit Value - Time weighted Average) is exceeded (oxygen deprivation level). b. The alarm will sound after the TLV-TWA (Threshold Limit Value - Time weighted Average) is exceeded (oxygen deprivation level). c. The alarm will sound before when any leak is detected d. The alarm will sound before when any leak in excess of 100 PPM is detected Answer: a. The alarm will sound before the TLV-TWA (Threshold Limit Value - Time weighted Average) is exceeded (oxygen deprivation level). Q: What is the safest rating of a refrigerant according to the ASHRAE scale? a. A-1 is considered the safest refrigerant while B-3 is the least safe b. B-1 is considered the safest refrigerant while A-3 is the least safe c. B-3 is considered the safest refrigerant while A-1 is the least safe d. None of the above. Answer: a. A-1 is considered the safest refrigerant while B-3 is the least safe Q: Why should oxygen or compressed air never be used to test leak a system? a. Oxygen or compressed air, when mixed with refrigerants, can cause an explosion b. Oxygen or compressed air contain moisture and will contaminate the system c. Oxygen or compressed air can't be detected by leak checking tools d. None of the above Answer: a. Oxygen or compressed air, when mixed with refrigerants, can cause an explosion Q: When using nitrogen to charge a system, what piece of equipment should it be charged through and where should a relief valve be located? a. Charge through a refrigeration manifold with a relief valve on the nitrogen cylinder b. Charge through a pressure regulator (make sure the nitrogen cylinder has a regulator on it) and insert a relief valve downstream line from the pressure regulator c. Install a relief valve prior to the pressure regulator. d. None of the above Answer: b. Charge through a pressure regulator (make sure the nitrogen cylinder has a regulator on it) and insert a relief valve downstream line from the pressure regulator Q: Where can you find the appropriate test pressures for a system? a. ARI directory b. Data plate on the low-side pressure valve c. Manufactures certified test data d. None of the above Answer: b. Data plate on the low-side pressure valve Q: What are the two conditions to be aware of in observing relief valves? a. NOT to be installed in series. b. Be replaced if corrosion build-up is found within the body of a relief valve. c. a and b d. None of the above Answer: c. a and b Q: What can happen to refrigerants if they are exposed to direct flame or other excessive heat? a. Change into toxic materials like phosgene gas b. Explode c. a and b d. All of the above Answer: a. Change into toxic materials like phosgene gas Q: Before welding, cutting or brazing a refrigerant line, what should be done? a. Read MSDS sheet b. Evacuate all refrigerant c. Run a constant flow of refrigerant through it while welding d. None of the above Answer: b. Evacuate all refrigerant