东大网院机械设备电气控制(含PLC)_2022秋_02
机械设备电气控制(含PLC)_2022秋_021.[单选题]<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">下列图形是(</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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" lang="EN-US"></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">)的图形符号</span></p><p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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"><img width="255" height="90" alt="" src="http://exam.neu.edu.cn/resourcefile/bdeditor/dbdx/qianyi/77902/b74e1089-8a6d-495f-a88d-8b9735ac32cf/2010102911722895.JPG" /></span></p>
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A.接触器
B.中间继电器
C.时间继电器
D.速度继电器
正确答案:——A——
2.[单选题]直流电动机的定子主要由机座、()、换向磁极、电刷装置、前后端盖等构成。
A.线圈绕组
B.励磁绕组
C.磁通
D.主磁极
正确答案:——D——
3.[单选题]点位控制系统生产效率的高低决定于点与点之间移动轨迹、()和路线。
A.速度
B.方向
C.位移
D.相对位置
正确答案:——A——
4.[单选题]<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">下列图形是(</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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" lang="EN-US"></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">)的图形符号</span></p><p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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"><img width="688" height="208" alt="" src="http://exam.neu.edu.cn/resourcefile/bdeditor/dbdx/qianyi/77902/be7ad6e5-8db8-4694-a96c-9a9d51fa0deb/2010102911111574.JPG" /></span></p>
A.接触器
B.中间继电器
C.时间继电器
D.速度继电器
正确答案:————
5.[单选题]数控机床控制系统的控制中心是()。
A.进给伺服系统
B.主轴伺服系统
C.数控装置
D.机床强电控制系统
正确答案:————
6.[单选题]利用刀具对金属毛坯进行切削,从而加工出机械零件的工作机械称为()。
A.机床
B.设备
C.生产线
D.加工
正确答案:————
7.[单选题]<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">下列图形是(</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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" lang="EN-US"></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">)的图形符号</span></p><p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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"><img width="211" height="96" alt="" src="http://exam.neu.edu.cn/resourcefile/bdeditor/dbdx/qianyi/77902/f183f63d-e651-41a9-978e-8f2d418e37c4/20101029111616709.JPG" /></span></p>
A.熔断器
B.热继电器
C.电流继电器
D.电压继电器
正确答案:————
8.[单选题]下列哪种不属于三相异步电机常用的调速途径( )
A.改变定子绕组极对数
B.改变转差率
C.改变电枢电流
D.改变电源频率
正确答案:————
9.[单选题]机械零件的尺寸精度、形状精度和( ),主要靠切削加工来实现。
A.表面纹理
B.表面粗糙度
C.波纹度
D.装配精度 重庆大学答案
正确答案:————
10.[单选题]<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">图示梯形图方块为(</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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" lang="EN-US"></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">)</span></p><p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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"><img width="157" height="150" alt="" src="http://exam.neu.edu.cn/resourcefile/bdeditor/dbdx/qianyi/77902/d1c3c2e9-9422-42f2-a2d0-6235df9baf61/2010102915634948.JPG" /></span></p>
A.与指令
B.或指令
C.非指令
D.置位/复位指令
正确答案:————
11.[单选题]三相笼型异步电机主要由()和转子组成。
A.机座
B.铁心
C.绕组
D.定子
正确答案:————
12.[单选题]数控机床低压电器按用分类,下列哪一种不属于( )
A.控制电器
B.保护电器
C.执行电器
D.检测电器
正确答案:————
13.[单选题]<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">下列图形是(</span><span style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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" lang="EN-US"></span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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">)的图形符号</span></p><p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; mso-bidi-font-size: 12.0pt; 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"><img width="167" height="105" alt="" src="http://exam.neu.edu.cn/resourcefile/bdeditor/dbdx/qianyi/77902/8e29b797-d4c6-4d15-91ce-799d7355e683/2010102911554736.JPG" /></span></p>
A.万能转换开关
B.压力继电器
C.接近开关
D.速度继电器
正确答案:————
14.[单选题]电动机的机械特性指电源电压为常数、励磁电流为常数、电枢回路电阻为常数时,电动机的电磁转矩与( )之间的关系。
A.转速
B.电压
C.磁通
D.转速
正确答案:————
15.[单选题]励磁方式是指直流电动机()的产生方式。
A.主磁通
B.励磁磁通
C.电磁转矩
D.感应电动势
正确答案:————
16.[判断题]直线控制系统的刀具运动轨迹一般是平行于各坐标轴的直线,因此刀具运动轨迹不能与坐标轴成一定夹角。
A.正确
B.错误
正确答案:————
17.[判断题]PLC应用最基本、最广泛的领域是位置控制方面。
A.正确
B.错误
正确答案:————
18.[判断题]S7-300PLC的编程语言是STEP7。
A.正确
B.错误
正确答案:————
19.[判断题]在光电式、接触式和电磁感应式脉冲编码器中,电磁感应式编码器优于其它两种。
A.正确
B.错误
正确答案:————
20.[判断题]自动控制系统的动态性能要求是稳定性。
A.正确
B.错误
正确答案:————
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