![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
尽头线的有效长,面向线路终点对向道岔(无轨道电路)时,为()的距离
A.尖轨尖端至车挡
B.警冲标至车挡前10m处
C.警冲标至车挡
D.尖轨尖端至车挡10m处
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
C、警冲标至车挡
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.尖轨尖端至车挡
B.警冲标至车挡前10m处
C.警冲标至车挡
D.尖轨尖端至车挡10m处
C、警冲标至车挡
尽头线的有效长,顺向道岔时为()的距离。
A.尖轨尖端至车挡
B.警冲标至车挡
C.警冲标至车挡前10m处
D.尖轨尖端至车挡10m处
A.0.5Vmax
B.0.6Vmax
C.0.7Vmax
D.0.8Vmax
A.70
B.40
C.30
D.25