96 Auto Heating and Air Conditioning Copyright by Goodheart-Willcox Co., Inc. ASE-Type Questions—Chapter 5 8. Raising pressure will _____ the temperature at which a change of state takes place. 9. High humidity makes it hard for the body to remove perspiration by _____. 10. Which of the following is a heat exchanger? (A) Evaporator. (B) Condenser. (C) Compressor. (D) Both A and B. 11. In an operating refrigeration system, the refrigerant in the evaporator is under _____ pressure. 12. In an operating refrigeration system, the refrigerant in the condenser is under _____ pressure. 13. Which of the following is always used on an automotive refrigeration system? (A) Muffl er. (B) Receiver-drier. (C) Flow restrictor. (D) Accumulator. 14. Is the refrigerant line between the condenser and fl ow restrictor a liquid line or a vapor line? 15. What three things make up the heat load on the refrigeration system? ASE-Type Questions—Chapter 5 1. All of the following statements about heat are true, except: (A) all substances are made up of atoms. (B) all molecules vibrate. (C) the vibration of molecules can be felt as heat. (D) the less molecular vibration, the more heat. 2. Technician A says heat always travels from a warmer object to a colder one. Technician B says when all objects in an area are at the same temperature, no heat transfer will occur. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 3. Th e usual way to cause a change of state is by adding or removing _____. (A) pressure (B) refrigerant (C) air fl ow (D) heat 4. Technician A says only a liquid can change state up or down. Technician B says a chemical change can also be a change of state. 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 latent heat are true, except: (A) latent heat is oft en called hidden heat. (B) solids contain no latent heat. (C) changes of state release a small amount of latent heat. (D) adding or removing latent heat does not change the temperature of a substance. 6. Technician A says if the pressure is held constant, a substance will have diff erent vaporizing and condensing temperatures. Technician B says higher pressures cause higher boiling points. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B. 7. Th e amount of water vapor in the surrounding air is called the _____. (A) humidity (B) latent heat (C) sensible heat (D) boiling point 8. Which of the following refrigeration system devices restricts the fl ow of refrigerant into the evaporator? (A) Accumulator. (B) Expansion valve. (C) Receiver-drier. (D) Condenser. 9. What two devices are never found on the same refrigeration system? (A) Compressor and condenser. (B) Accumulator and fl ow restrictor. (C) Accumulator and condenser. (D) Accumulator and receiver-drier. 10. When water vapor condenses on the evaporator, which of the following happens? (A) It turns to ice. (B) It releases latent heat. (C) It absorbs latent heat. (D) Th e water drips on the condenser.