Before 1994, Most Automotive A/C Systems Used a Refrigerant Called

Q47: Before 1994, most manufacturers used _ as

Q48: The heater control valve is often called

Q49: Which statement is true?<br>A)R-12 is a hydrofluorocarbon.<br>B)R-12

Q50: The U.S. Clean Air Act of 1990

Q51: Humans find high relative humidity more comfortable

Q53: What is the purpose of an A/C

Q54: Which of these statements is true?<br>A)Water vaporizes

Q55: The heater core is part of the

Q56: What is the purpose of a blend

Q57: The evaporator is located _.<br>A)in front of