单项选择题
A.Spring-centered valve B.Unloading valve C.Three-position valve D.Two-position valve
Which of the listed refrigeration system components kee...
单项选择题Which of the listed refrigeration system components keeps the refrigerant circulating through the system?（）
A.Expansion valve B.Condenser C.Evaporator D.Compressor
Which of the listed components is considered to separat...
单项选择题Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）
A.The condenser and the expansion valve B.The king valve and the solenoid valve C.The compressor and the expansion valve D.The condenser and the solenoid valve
A compound gage is used to measure （）.A.temperature and...
单项选择题A compound gage is used to measure （）.
A.temperature and pressure B.humidity and temperature C.pressure and vacuum D.pressure and humidity
