【单选题】
(37094)力使物体产生转动的效果与___有关。(1.0分)
A. 力的大小
B. 力臂
C. 力的方向
D. 以上都是
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答案
D
解析
暂无解析
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【单选题】
(37095)轴可以在孔内任意转动,也可以沿孔轴线作微量移动,但是轴是不能沿___运动。(1.0分)
A. 径向向外
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【单选题】
(37096)构件按运动性质可分为___、主动件、从动件。(1.0分)
A. 固定件
B. 辅助件
C. 联接件
D. 运动副
【单选题】
(37097)在构件中,我们把两个构件组成的具有一定相对运动的联接称为___。 (1.0分)
A. 主动件
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【单选题】
(37098)在曲柄摇杆机构中,通常以曲柄为___,并作匀速圆周转动。 (1.0分)
A. 主动件
B. 从动件
C. 固定件
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【单选题】
(37099)在铰链四杆机构中,两连架都为___的称为双曲柄机构。(1.0分)
A. 曲柄
B. 连杆
C. 摇杆
D. 固定件
【单选题】
(37100)两连架都为___的机构的称为双摇杆机构。 (1.0分)
A. 曲柄
B. 连杆
C. 摇杆
D. 固定件
【单选题】
(37101)在凸轮机构中通常凸轮作匀速转动,驱使从动杆移动或___。 (1.0分)
A. 摆动
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D. 不动
【单选题】
(37102)在链传动中由于啮合传动,能保证准确的___,效率高。 (1.0分)
A. 传动比
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C. 效率比
D. 扭力比
【单选题】
(37103)在链传动中链条作为中间传动件,可用在两轴___的地方。 (1.0分)
A. 中心距较大
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C. 相与垂直
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【单选题】
(37104)蜗杆传动通常用于两轴交错成___的传动。 (1.0分)
A. 45°
B. 90°
C. 30°
D. 60°
【单选题】
(37105)蜗杆传动是由蜗杆和蜗轮组成,一般蜗杆为 ___。 (1.0分)
A. 主动件
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D. 运动副
【判断题】
明桥面木结构作业的主要项目是桥枕护木。(1.0分)
A. 对
B. 错
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八三式轻墩可适应单线、直线、平坡及半径小于500 m,坡度不大于6‰的铁路桥梁使用。(1.0分)
A. 对
B. 错
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(35912)水泥砂浆的和易性主要由砂浆稠度来决定。(1.0分))
A. 对
B. 错
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(35913)混凝土具有耐久性和整体性的优点。(1.0分)
A. 对
B. 错
【判断题】
(35914)混凝土中配有钢筋的,叫钢筋混凝土,它能克服混凝土抗拉能力低的弱点。(1.0分)
A. 对
B. 错
【判断题】
(35915)提高水灰比能提高混凝土的密实度和强度。(1.0分)
A. 对
B. 错
【判断题】
(35916)枕木垛基础应平整坚实,松软地段应铺垫碎石或抛填片石加固。(1.0分)
A. 对
B. 错
【判断题】
(35917)地道桥顶进时,分配横梁的主要作用是承受顶镐荷载。(1.0分) )
A. 对
B. 错
【判断题】
(35918)地道桥顶进中,开挖宽度较箱身宽10cm,以减少侧面阻力。(1.0分) )
A. 对
B. 错
【判断题】
(35919)螺栓涂油完后,重新安装,拧紧螺丝帽,扭矩应达到150N•m以上。(1.0分) )
A. 对
B. 错
【判断题】
(35920)顶进中采用的千斤顶,计算顶力时,应按额定顶力的80%计算。(1.0分)
A. 对
B. 错
【判断题】
(35921)弧形支座锚螺栓直径不得小于26mm。(1.0分)
A. 对
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【判断题】
(35922)桥梁上常用的铆钉是高头锥体铆钉。(1.0分)
A. 对
B. 错
【判断题】
(35923)允许速度200km/h的线路上,本线封锁施工,邻线来车速度不大于120km/h时,可不下道。 (1.0分)
A. 对
B. 错
【判断题】
(35924)铆钉头处有流锈痕迹,或周围油漆有裂纹现象时,即可判为铆钉松动。(1.0分)
A. 对
B. 错
【判断题】
(35925)普通螺栓的连接和计算方法与铆钉完全相同。(1.0分)
A. 对
B. 错
【判断题】
(35926)简支梁的温度跨度是按固定支座到相邻墩台间的距离计算的。(1.0分)
A. 对
B. 错
【判断题】
(35927)高强度螺栓的终拧有扭矩法和转角法。(1.0分)
A. 对
B. 错
【判断题】
(35928)高强度螺栓是通过板束间摩擦力来传递各种外力的。(1.0分)
A. 对
B. 错
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(35929)对涵洞端翼墙的检查主要有无因填土、冻害和局部冲刷而发生裂纹、挤出、倾斜和冲空。 (1.0分)
A. 对
B. 错
【判断题】
(35930)高强度螺栓的施工预拉力应符合设计要求,欠拧值或超拧值均不超规定的20%。(1.0分)
A. 对
B. 错
【判断题】
(35931)在行车线上更换铆钉时,可使用50%以下的冲钉。(1.0分)
A. 对
B. 错
【判断题】
(35932)钢结构应具有要求的刚度、强度和稳定性,确保施工质量和行车安全。(1.0分)
A. 对
B. 错
【判断题】
(35933)钢梁上的存水处应加泄水孔,泄水孔直径应大于80mm。(1.0分)
A. 对
B. 错
【判断题】
(35934)钢梁杆件的缝隙均先用钢梁腻子封闭,然后涂装。(1.0分)
A. 对
B. 错
【判断题】
(35935)K型扣件的主要作用是增强桥上线路稳定。(1.0分)
A. 对
B. 错
【判断题】
1/9928.(35936)在砂质土中顶进,采用锯齿形刃角有利于施工挖土。(1.0分)
A. 对
B. 错
【判断题】
(35937)安装高强度螺栓,为减少摩阻力,可在螺母的螺纹上涂少许机油。(1.0分)
A. 对
B. 错
【判断题】
(35939)同一测深垂线,水面流速最大,河底流速最小。(1.0分)
A. 对
B. 错
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