![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
钢轨折断临时处理,当钢轨折损严重、断缝超过30mm或紧急处理后不能及时焊复时,应切除伤损部分,在两锯口间插入长度不短于()m的同型钢轨,轨端钻孔,安装接头夹板,用10.9级螺栓拧紧,拧紧短轨前后各50m范围内的扣件,按不超过160km/h速度放行列车
A.4.5
B.6
C.8
D.20
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、6
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.4.5
B.6
C.8
D.20
B、6
A.6m
B.10m
C.20m
D.25m
A.3
B.5
C.6
A.6
B.8
C.10
D.11
A.4m
B.6m
C.8m
D.10m
A.非工作边
B.工作边
C.下颚
D.外侧
A.120km/h
B.200km/h
C.250km/h
D.160km/h