成考院校在线答案
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">11、<span style="mso-bidi-font-size:10.5pt;font-family:华文宋体;color:#333333;mso-font-kerning: 0pt">系统不可能具有无穷大的功率。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">26、<span style="mso-bidi-font-size:10.5pt;font-family:华文宋体;color:#333333;mso-font-kerning: 0pt">采用交流接触器、按钮等构成的鼠笼式异步电动机直接启动控制电路，为什么在合上电源开关后，电动机启动、停止控制都正常，但转向却是反的，这是因为引入电动机的电源相序错误。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">8、<span style="mso-bidi-font-size:10.5pt;font-family:华文宋体;color:#333333;mso-font-kerning: 0pt">速度继电器<span class="GramE">按速度</span>原则动作的继电器，速度继电器常用于三相异步电动机的正反转控制线路中。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">27、<span style="mso-bidi-font-size:10.5pt;font-family:华文宋体;color:#333333;mso-font-kerning: 0pt">生产机械上大多用高压电器。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">35、<span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">机电传动系统稳定工作时，如果</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt">T<sub>M</sub>=T<sub>L</sub></span><span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，电动机旋转方向与</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt">T<sub>M</sub></span><span style="mso-bidi-font-size: 10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">相同，转速将产生的变化是</span><u><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun:yes"> </span></span></u><span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">29、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">能耗制动是在电动机脱离交流电源后，迅速给定子绕组通入</span><span lang="EN-US">_____<span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">产生恒定磁场，利用转子感应电流与恒定磁场的相互作用达到制动的目的。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">33、<span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:等线; mso-hansi-font-family:等线;color:#333333;mso-font-kerning:0pt">下列属于自动电器的是。</span><span lang="EN-US">_______</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">40、<span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">机电传动系统中如果</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt">T<sub>M</sub><T<sub>L</sub></span><span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">，电动机旋转方向与</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt">T<sub>M</sub></span><span style="mso-bidi-font-size: 10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">相同，转速将产生的变化是</span><u><span lang="EN-US" style="mso-bidi-font-size: 10.5pt"><span style="mso-spacerun:yes"> </span></span></u><span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">34、<span style="mso-bidi-font-size:10.5pt;font-family:Microsoft Yahei;mso-ascii-font-family:等线; mso-hansi-font-family:等线;color:#333333;mso-font-kerning:0pt">用于计数器或移位寄存器复位的指令。</span><span lang="EN-US">_______</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="mso-pagination:widow-orphan">31、<span lang="EN-US">PLC</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的</span><span lang="EN-US">I/O</span><span style="font-family: 宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">点数是指</span><span lang="EN-US">_______</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;mso-font-kerning:0pt"> <o:p></o:p></span></p>