Refrigeration-Air Conditioning Study Guide Rated A+

74. The primary purpose of the liquid line strainer used in a refrigeration system is to prevent dirt and scale from entering what system component(s)? {Ans: thermal expansion valves}227. When checking zinc plates or pencil zincs in the refrigerating system condenser, what should you do? {Ans: replace the zincs if deteriorated by 50%}73. Which of the following dehydrators or combination filter/driers features a core that can be replaced when the desiccant becomes saturated with moisture? Illustration GS-RA-10 {Ans: A}3. When the relief valve opens on a refrigeration compressor discharge line, it discharges high-pressure refrigerant vapor to what location? {Ans: suction side of the compressor}91. Which of the following is true concerning the class "D" air conditioning system shown in the following illustration? Illustration GS-RA-42 {Ans: The duct thermostat determines the amount of water flow circulating through the cooling coil.}27. Which of the illustrated devices would be the LEAST accurate for the purposes of weighing-in a refrigerant charge? Illustration GS-RA-45 {Ans: C}