20春学期《低压保护电器可靠性理论及其应用》在线平时作业3

adminhan

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-weight: bold; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">采用冗余技术，可以全面提高产品的基本可靠性<span lang="EN-US">(&nbsp; )</span></span>
A:错误
B:正确

美国朱兰把概率与数理统计学用于产品质量管理，提出产品质量的管理图，标志着质量管理进入第二阶段，即统计质量管理阶段。<span>(&nbsp;&nbsp;&nbsp;&nbsp; )</span>
A:错误
B:正确

工程能力越高，产品质量参数的分散性就越大。<span>(&nbsp;)</span>
A:错误
B:正确

降额使用是为改善可靠性而有计划地减轻材料或元器件的内部应力，降额系数越大越好。<span>(<span>&nbsp;&nbsp; )</span></span>
A:错误
B:正确

当产品的质量参数超出允许的公差（规范值）范围时，这些产品就是不合格品。<span>(&nbsp;)</span>
A:错误
B:正确

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-weight: bold; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">寿命试验数据个数较少时通常绘制失效频率直方图估计产品寿命失效分布类型。（&nbsp;&nbsp;&nbsp; ）</span>
A:错误
B:正确

低压断路器的可靠性指标包括保护成功率等级及操作故障等级。（<span>&nbsp;）</span>
A:错误
B:正确

定时或订数截尾试验方案一般适用于价格昂贵的产品可靠性验证试验。（<span>&nbsp;）</span>
A:错误
B:正确

阶数越小的故障数最小割集对系统故障的影响越小。<span>(<span>&nbsp;&nbsp; )</span></span>
A:错误
B:正确

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-font-kerning: 1.0pt; mso-bidi-font-weight: bold; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">使用可靠性是产品使用过程表现出来的特性，不是固有特性<span lang="EN-US">(&nbsp;&nbsp; )</span></span>
A:错误
B:正确

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">高质量等级的电子产品，其故障率在其寿命期内基本是一条（<span lang="EN-US">&nbsp; <span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span>）</font></span></p>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">呈下降趋势的直线</font></span>
B:<font face="宋体" size="3">平稳的直线</font>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">呈上升趋势的直线<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span></font></span>
D:<font face="宋体" size="3">先降后升的曲线</font>

<div>ROC曲线表示接收概率与产品真实（<span>&nbsp; ）之间的关系</span></div><div><span></span></div>
A:<div>失效率</div>
B:<span>可靠度</span>
C:平均值
D:标准离差

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-style: italic">已知一批产品的失效率</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic"><span style="POSITION: relative; TOP: 3pt; mso-text-raise: -3.0pt"><v:shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" o:preferrelative="t" o:spt="75" coordsize="21600,21600"><span lang="EN-US" style="FONT-FAMILY: Symbol; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-char-type: symbol; mso-symbol-font-family: Symbol"><span style="mso-char-type: symbol; mso-symbol-font-family: Symbol">l=2,</span></span></v:shapetype></span></span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-style: italic">求这批产品的可靠度</span><em><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体">R</span></em><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic">=( <span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span>)</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'; mso-bidi-font-style: italic">。</span>
A:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic">e^-2t</span>
B:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic">e^t</span>
C:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic">e^-0.5t</span>
D:<span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times New Roman'; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体; mso-bidi-font-style: italic">e^2t</span>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">产品可靠性定义中<span lang="EN-US">,</span>规定的时间可用（<span lang="EN-US"><span style="mso-spacerun: yes"> </span><span style="mso-spacerun: yes">&nbsp; </span></span>）度量<span lang="EN-US"><o:p></o:p></span></font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"></span></font><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt"><o:p><font size="3"></font></o:p></span></p>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">小时</font></span>
B:<font face="宋体" size="3">里程</font>
C:<font face="宋体" size="3">次数</font>
D:<font face="宋体" size="3">概率</font>

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-bidi-font-weight: bold"><font size="3">产品在规定条件下和规定时间内<span lang="EN-US">,</span>完成规定功能的概率称之为（<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp; </span></span>）<span lang="EN-US"><o:p></o:p></span></font></span></p>
A:<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">可用度</span>
B:<font face="宋体" size="3">可靠度</font>
C:<font face="宋体" size="3">可信度</font>
D:耐久度

<div>（<span> ）故障是漏电保护器元件质量不合格，运行后引起的老化和损伤导致元件丧失原有工作性能的原因。</span></div><div><span></span></div>
A:<div>误动</div>
B:<span>拒动&nbsp;</span>
C:<span>&nbsp;</span>操作&nbsp;
D:复位

<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'">掷一个骰子，其出现点数为</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体">1</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'">的概率</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体"> </span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'">（</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体"><span style="mso-spacerun: yes">&nbsp; </span><span style="mso-spacerun: yes">&nbsp;</span><span style="mso-spacerun: yes">&nbsp;</span></span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-font-kerning: 1.0pt; mso-bidi-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-ascii-font-family: 'Times New Roman'">）。</span>
A:<p><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-weight: bold; mso-fareast-font-family: 宋体; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-hansi-font-family: 宋体">1</span></p>
B:1/2
C:1/3
D:1/6

<div>当产品寿命服从单参数指数分布时，已知其失效率<span>0.0002,则其平均寿命互为（&nbsp;&nbsp; &nbsp;）</span></div><span><div></div></span>
A:<div>&nbsp;0.0002&nbsp;</div>
B:500&nbsp;
C:&nbsp;5000&nbsp;
D:0.0005

.<img height="79" width="689" alt="" src="http://file.open.com.cn/ItemDB/106719/763400a5-4f6a-47ec-9120-889f12b55fc6/201232103435730.JPG" />
A:A
B:B
C:C
D:D

<div>（<span>&nbsp; &nbsp;）故障是指没有发生漏电故障时漏电保护器发生误动作而将电路切断。</span></div><div><span></span></div>
A:<div>误动<span>&nbsp;&nbsp;&nbsp;</span></div>
B:拒动&nbsp;
C:<span>&nbsp;</span>操作&nbsp;&nbsp;
D:复位