单项选择题
A.the solenoid valve to seize B.the compressor to hunt C.flash gas to form in the liquid line D.the expansion valve to freeze open
In a direct expansion type multi-box refrigeration syst...
单项选择题In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the（）
A.pressurestat B.high pressure cutout C.solenoid valve D.low pressure cutout switch
The pressure range between the system cut in and cut ou...
单项选择题The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as（）
A.opposing operational drag B.pressure distribution C.differential D.system purge
A fluid coil will （）large quantities of heat when it ch...
单项选择题A fluid coil will （）large quantities of heat when it changes state from a liquid to a vapor.
A.release B.absorb C.develop D.regenerate
