单项选择题
One function of the thermal expansion valve is to（）
A.act as a pilot from the solenoid valve B.regulate the amount of refrigerant flow to the coil C.regulate the water flow D.turn the compressor off and on
单项选择题 Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a（）
单项选择题 Hot gas bypass is one of the methods used to （）
单项选择题 Thermostatic expansion valves can be adjusted for （）
