试题详情

判断轨道电路红光带故障点时,在分线盘接收端子上甩开软线测量电缆芯线电压,( )

A电压比正常偏高说明室内故障

B有正常电压说明室外故障

C电压低说明室内故障

D电压比正常偏高说明室外故障