成考院校在线答案
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">3、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">因为</span><span lang="EN-US" style="color:windowtext">“</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">自动开关</span><span lang="EN-US" style="color:windowtext">”</span><span style="font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"; color:windowtext">已经具有多种保护功能，所以在控制电路中可以只采用自动开关来对电路或电气设备进行保护。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">7、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">三相笼型异步电动机的电气控制线路，如果使用热继电器作过载保护，就不必再装设熔断器作短路保护。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">16、<span lang="EN-US" style="color:windowtext">“</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">限位开关</span><span lang="EN-US" style="color:windowtext">”</span><span style="font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"; color:windowtext">就是依靠运动中的机械机构的机械碰撞或推压后而改变其内部触点状态的控制电器。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;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 lang="EN-US" style="color:windowtext">F</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">系列可编程序控制器辅助继电器用</span><span lang="EN-US" style="color:windowtext">T</span><span style="font-family:Microsoft Yahei; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"; color:windowtext">表示。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt; color:windowtext;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">19、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">可编程序控制器编程简单，操作方便，维修容易，易发生操作失误。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">20、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">长动和点动的主要区别在于松开启动按钮后，电动机能否继续保持得电运转的状态。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">5、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">继电器属于手动电器。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning:0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">13、<span lang="EN-US" style="color:windowtext">F</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">系列可编程控制器内部元件计数器为加法计数器，当计数器接通后，从设定值一直减到零时，计数器线圈有电，相应触点动作。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">2、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman";color:windowtext">闸刀开关可以用于分断大容量的电动机。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan">4、<span lang="EN-US" style="color:windowtext">F</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";color:windowtext">系列可编程序控制器梯形图规定元件的地址必须在有效范围内。</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;color:windowtext;mso-font-kerning: 0pt"> <o:p></o:p></span></p>