152 Auto Heating and Air Conditioning Copyright by Goodheart-Willcox Co., Inc. 1. Technician A says some vans and trucks have two evaporators. Technician B says some evaporators have more than one row of tubes. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 2. All of the following statements about tube and fi n coils are true, except: (A) fi ns are usually pressed tightly over the tubing. (B) some tube and fi n evaporators are double or triple row designs. (C) bending the fi ns makes them transfer more heat. (D) bending the fi ns makes them weaker. 3. Technician A says a multiple-pass plate and fi n evaporator can be spotted by the use of an oil return line. Technician B says the multiple-pass plate and fi n evaporator has been replaced by a later design. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 4. Evaporators with expansion valves are being discussed. Technician A says the sensing bulb is located at the outlet tube of the evaporator. Technician B says the bulb can be clamped to the tube exterior and covered with insulation. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 5. All of the following statements about condensers are true, except: (A) the condenser tubing is a heavier gauge than the evaporator tubing. (B) modern condensers are cross-fl ow types. (C) all condensers have a single serpentine tube. (D) R-134a systems are likely to use multifl ow condensers. 6. Th e accumulator is located close to the: (A) evaporator inlet. (B) evaporator outlet. (C) condenser inlet. (D) condenser outlet. 7. Which of the following is the best description of the purpose of the accumulator oil return hole? (A) Allows refrigerant to return to the compressor. (B) Allows oil to return to the compressor. (C) Traps debris in the accumulator. (D) Separates liquid and vaporized refrigerant. 8. All of the following are jobs of the receiver-drier, except: (A) hold condensed oil. (B) hold condensed refrigerant. (C) remove moisture from the refrigerant. (D) trap loose metal or dirt particles. 9. Technician A says that using an accumulator ensures that only vaporized refrigerant reaches the compressor. Technician B says that using a receiver- drier ensures that only liquid refrigerant reaches the expansion valve. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 10. A fusible plug on the receiver-drier prevents all of the following, except: (A) compressor damage. (B) loss of refrigerant. (C) hose rupture. (D) system overheating. ASE-Type Questions—Chapter 9