西南交《机械设计B》在线作业二

adminhan

___________通常应成对使用
A:深沟球轴承
B:圆锥滚子轴承
C:推力球轴承
D:圆柱滚子轴承

用于联接的螺纹牙型为三角形，这是因为三角形螺纹_________。
A:牙根强度高，自锁性能好
B:传动效率高
C:防振性能好
D:自锁性能差

巴氏合金是用来制造___________。
A:单层金属轴瓦
B:双层或多层金属轴瓦
C:含油轴承轴瓦
D:非金属轴瓦

机械设计这一门学科，主要研究_______的工作原理、结构和设计计算方法。
A:各类机械零件和部件
B:通用机械零件和部件
C:专用机械零件和部件
D:标准化的机械零件和部件

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">在螺纹联接常用的防松方法中，当承受冲击或振动载荷时，无效的方法是</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">( )</span>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">采用开口销与六角开槽螺母</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">采用胶接或焊接的方法　</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">设计时使螺纹联接具有自锁性能</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体"> </span>

直齿锥齿轮强度计算时，是以______为计算依据的。
A:大端当量直齿锥齿轮
B:齿宽中点处的直齿圆柱齿轮
C:齿宽中点处的当量直齿圆柱齿轮
D:小端当量直齿锥齿轮

我国国家标准的代号是______。
A:GC
B:KY
C:GB
D:ZB
E:JB
F:YB

增大轴在截面变化处的过渡圆角半径，可以___________。
A:使零件的轴向定位比较可靠
B:降低应力集中提高轴的疲劳强度
C:使轴方便加工

对于联接用螺纹，主要要求联接可靠，自锁性能好，故常选用________。
A:升角小，单线三角形螺纹
B:升角大，双线三角形螺纹
C:开角小，单线梯形螺纹
D:升角大，双线矩形螺纹

滑动轴承限制pv?值是为了限制____________
A:轴承温升
B:轴承磨损
C:轴承耗油量
D:摩擦过大

带传动在工作中产生弹性滑动的原因是______。
A:带与带轮之间的摩擦系数较小
B:带绕过带轮产生了离心力
C:带的弹性以及紧边和松边存在拉力差
D:带传递的中心距大

除了正火以外，软齿面齿轮常用的热处理方法还有________。
A:渗氮
B:调质
C:碳氮共渗
D:渗碳淬火

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">螺纹的公称直径（管螺纹除外）是指它的</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">( )</span>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">内径</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">d1</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">大径</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">d </span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">中径</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">d2</span>

蜗杆传动中轮齿承载能力的计算主要针对___________来进行的
A:蜗杆齿面接触强度和蜗轮齿根抗弯强度
B:蜗轮齿面接触强度和齿根抗弯强度
C:蜗杆齿面接触强度和齿根抗弯强度
D:蜗轮齿面接触强度和蜗杆齿根抗弯强度

与链传动相比较，带传动的优点是＿＿。
A:工作平稳，基本无噪声
B:承载能力大
C:传动效率高
D:使用寿命长

对于开式齿轮传动，在工程设计中，一般_________。
A:按接触强度设计齿轮尺寸，再校核弯曲强度
B:按弯曲强度设计齿轮尺寸，再校核接触强度
C:只需按接触强度设计
D:只需按弯曲强度设计

设计一台机器,包括以下几项工作：a.零件设计；b.总体设计；c.技术设计，它们进行的顺序大体上是_______。
A:a→c→b
B:b→a→c
C:b→c→a
D:c→b→a

大链轮的齿数不能取得过多的原因是_______。
A:齿数越多，链条的磨损就越大
B:齿数越多，链传动的动载荷与冲击就越大
C:齿数越多，链传动的噪声就越大
D:齿数越多，链条磨损后，越容易发生“脱链现象”

计算紧螺栓联接的拉伸强度时，考虑到拉伸与扭转的复合作用，应将拉伸载荷增加到原来的________倍。
A:l.l
B:l.3
C:1.25
D:0.3

套筒滚子链传动不宜用于高速，主要是因为______
A:链的离心力太大
B:冲击太大
C:受磨损限定
D:受链板疲劳强度限定

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">普通螺纹联接中的松联接和紧联接之间的主要区别是：松联接的螺纹部分不承受</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">( )</span>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">拉伸作用</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">扭转作用</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">弯曲作用</span>

链传动中当其它条件不变的情况下，传动的平稳性随链条节距P的。
A:减小而提高
B:减小而降低
C:增大而提高
D:增大而不变

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">下列材料中，（</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">）是代表轴承合金（巴氏合金）。</span>
A:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">ZSnSb11Cu6</span>
B:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">ZCuPb30</span>
C:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 150%; FONT-FAMILY: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">ZCuSn10P1</span>

在螺栓联接设计中，若被联接件为铸件，则有时在螺栓孔处制做沉头座孔或凸台，其目的是_______。
A:避免螺栓受附加弯曲应力作用
B:便于安装
C:为安置防松装置
D:为避免螺栓受拉力过大

机械零件中应用最广泛的材料，普通碳素钢为_______，优质碳素钢为___________，灰铸铁为______________。
A:45
B:ZG4
C:40Cr
D:ZCuSn10P1
E:Q235
F:HT200