EPA SECTION 608 TYPE III (2019 revision)Correct 100%!

On low-pressure chillers, moisture most frequently enters the system through; a. air leaks in the rupture disc assembly. b. tube leaks in the evaporator. c. leaks from areas with gaskets or fittings. d. leaks from the charging service valve. - ANSWER c. leaks from areas with gaskets or fittings. What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube leaks? a. Drain the water sides of the evaporator and continue. b. Run the circulating pumps. c. Be certain the purge unit is operating. d. Open the condenser vents. - ANSWER a. Drain the water sides of the evaporator and continue. Continuous excessive moisture collection in the purge unit of a low-pressure refrigeration system could indicate what condition? a. The system was charged with contaminated refrigerant. b. The condenser or chiller barrel tubes are leaking. c. The purge unit is not operating properly d. The purge adjustment is not set properly. - ANSWER b. The condenser or chiller barrel tubes are leaking. Which of the following CANNOT be used as a reason to extend the appliance repair deadlines? a. Requirements of federal, state, or local regulations make the repair within 30 days impossible. b. The appliance is located in an area that is subject to radiological contamination. c. Necessary repair parts are unavailable d. A certified service technician is not available. - ANSWER d. A certified service technician is not available. What is the best method to determine a chiller's normal charge for leak rate calculations? a. Determine from the maximum power consumption. b. Determine from the compressor horsepower. c. Determine from the dimensions of the chiller. d. Use the charge stated on the equipment nameplate. - ANSWER d. Use the charge stated on the equipment nameplate. Approximately how much refrigerant vapor is left in an average 350-ton R-123 chiller at 0 psig once all the R-123 liquid has been removed? a. Trace amount b. 50 pounds c. 75 pounds d. 100 pounds - ANSWER d. 100 pounds A rup