单选题Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）Aactivate the driersBchange colorCsecure the compressorDadd a predetermined amount of liquid drier
单选题
Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）
A
activate the driers
B
change color
C
secure the compressor
D
add a predetermined amount of liquid drier
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