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【单选题】
69/99668.(36816).隧道渗井直径不宜大于___。(1.0分)
A. 300mm
B. 250mm
C. 200mm
D. 150mm
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答案
C
解析
暂无解析
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(36817)框构桥顶面上的道砟厚度应在___以上,以免列车通过时刚度突变。(1.0分)
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(36818)桁梁主梁压力杆件弯曲,弯曲矢度不得超过杆件自由长度的___。(1.0分)
A. 1/600
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【单选题】
(36819)桁梁主梁拉力杆件弯曲,弯曲矢度不得超过杆件自由长度的___。(1.0分)
A. 1/800
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【单选题】
(36820)增建或改建框构、刚构桥时,桥上轨底至桥梁顶面高度应不小于___。(1.0分)
A. 500mm
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【单选题】
(36821)增建或改建框构、刚构桥时,其混凝土强度等级不小于___。(1.0分)
A. C30
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【单选题】
(36822)增建或改建框构、刚构桥时,混凝土抗渗等级不小于___。(1.0分)
A. P6
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C. P8
D. P9
【单选题】
(36823)___是内燃机中热能转变为机械能的主要机构。(1.0分)
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【单选题】
(36825)测量桁梁的平面,可在离弦杆中心一定距离的___上设置测点。(1.0分)
A. 上翼缘
B. 下翼缘
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【单选题】
(36826)固定支座的上下座板用___固定。(1.0分)
A. 销钉
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(36827)既可以作发电机运行,又可以作电动机运行,这种特性称为直流电机的___。(1.0分)
A. 单向导电性
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(36828)隧道无论晴雨天隧道内渗漏,见水量稳定,则该水源可判定为___。(1.0分)
A. 地表水
B. 地下水
C. 雨水
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(36829)固定支座需承受全部纵向水平力并不得小于活动端的___。(1.0分)
A. 滑阻力
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(36830)跨度16m圬工梁的弧形支座,埋入桥台深度不得少于___。(1.0分)
A. 250mm
B. 300mm
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D. 400mm
【单选题】
(36831)高强度螺栓在安装时,一排不少于___。(1.0分)
A. 2个
B. 3个
C. 4个
D. 6个
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(36832)与普通钢筋混凝土结构相比,预应力混凝土结构大大推迟了___时间。(1.0分)
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(36834)高强度螺栓、螺母、垫圈使用组合正确的是___。(1.0分)
A. 10.95、8H、HRC35~45
B. 10.95、10H、HRC35~45
C. 8.85、10H、HRC35~45
D. 10.95、8H、HRC45
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(36835)三相异步电动机异步的含义是___。(1.0分)
A. 三相电流异步
B. 三相电压异步
C. 旋转磁场与转子转速异步
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(36836)隧道施工中,空气中的氧气含量按体积不应小于___。(1.0分)
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(36837)更换钢梁后,支座底板四角相对高差不大于___。(1.0分)
A. 5mm
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D. 2mm
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71/99690.(36838)钢筋混凝土双曲拱桥拱圈部分由拱肋、拱波、拱板和___等四部分组成。(1.0分)
A. 支柱
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(36839)桥面检查桥枕是否压钢梁上平联杆件,可用___厚铁片进行检查。(1.0分)
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(36840)栓焊梁螺栓联结部位摩擦系数应不小于___。(1.0分)
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(36841)预应力混凝土梁梁体下缘竖向裂缝容许最大裂缝为___。(1.0分)
A. 不允许
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(36842)___不是基础加固的常用方法。(1.0分)
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(36843)墩台裂纹宽度限值要求墩帽不得大于___。(1.0分)
A. 0.1mm
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(36844)桥梁上,上弯度曲线平顺,跨中上弯度值与计算值差不超过___为优良。(1.0分)
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(36845)___不是钢结构锈蚀的检查方法。(1.0分)
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(36846)普通钢筋混凝土梁腹板上竖向裂纹产生的原因是___。(1.0分)
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B. 梁受力产生挠曲
C. 混凝土内外收缩不均匀所致
D. 桥面混凝土强度不足
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(36848)桥梁的检定承载系数用___表示。(1.0分)
A. G
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C. Q
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(36849)在拧紧圆形或方形布置的成组螺母时,必须___。(1.0分)
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(36850)盖板箱涵地基承载能力较高时,宜采用___基础。(1.0分)
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(36851)冬期混凝土施工,水加热温度不宜高于___。(1.0分)
A. 80℃
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C. 60℃
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(36853)特细砂混凝土的坍落度不宜大于___。(1.0分)
A. 10mm
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C. 30mm
D. 40mm
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(36854)基础埋置深度对于冻胀及强冻胀土,在冻结线以下不少于___。
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C. 0.3m
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(36855)土质隧道及松散破碎岩层不宜采用___,防止拱顶渗漏。(1.0分)
A. 外贴防水层
B. 钻孔排水
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D. 环氧树脂砂浆抹面
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(36856)洞顶岩石裂隙过大时,应采用___整治。(1.0分)
A. 水泥砂浆勾缝
B. 水泥砂浆抹面
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D. 喷水泥砂浆
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(36857)焊接过程中,在稍低于凝固温度时,产生的裂纹称为___。(1.0分)
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(36858)短隧道,坡度较小,开挖掘进方向为顺线路下坡方向,适宜的排水方式为___。(1.0分)
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(36859)钢结构涂膜劣化处理,当起泡、裂纹、脱落或生锈达___时,应进行重新涂装。(1.0分)
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【单选题】
并进行___。(1.0分)
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