20春学期《连铸坯凝固与质量控制》在线平时作业1

adminhan

&nbsp; <p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">在连铸中尽量采取一切措施使铸坯形成体积凝固，不出现中心缩孔，全面<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="TEXT-INDENT: 36pt; LINE-HEIGHT: 125%; mso-char-indent-count: 3.0"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">提高铸坯质量，论述正确吗？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">论述正确；<span lang="EN-US"><o:p></o:p></span></span>
B:<p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">论述不正确；</span></p>

&nbsp; <p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">铸坯中心产生集中缩孔缺陷的主要原因是下面哪一种分析？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"> 逐层凝固，且形成发达的柱状晶；</span>
B:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;</span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"> 发达的枝晶所形成；<span lang="EN-US"><o:p></o:p></span></span>
C:<p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">粗大的等轴晶所形成；<span lang="EN-US"><o:p></o:p></span></span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">方坯二冷区传热最主要的形式是是对流传热与辐射传热，此种论述是否正确？</span></p>
A:正确；
B:不正确；

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯凝固传热过程中下面哪一种提法是不对的？</span>
A:释放全部的过热量；
B:释放全部的凝固潜热；
C:释放全部的显热；

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">二冷传热过程中铸坯的表面温度对传热过程中的换热系数的影响是下面哪一种叙述？</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"> </span></p>
A:&nbsp;铸坯的表面温度越高换热系数越大；
B:铸坯的表面温度越低换热系数越小；
C:换热系数随铸坯的表面温度的降低而升高；

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">金属凝固动态曲线的绘制方法，下面哪一种是正确的？</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><o:p></o:p></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><o:p></o:p></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">用测温仪表在金属凝固过程中直接测量获得；<span lang="EN-US"><o:p></o:p></span></span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">用凝固传热模型计算获得；</span>
C:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">用测温仪表在金属凝固过程中直接测量获得断面上不同位置的点随时间变化曲线，然后参照断面上不同位置点随时间变化曲线绘制而获得；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">决定</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯的凝固方式的<span style="mso-bidi-font-weight: bold">主要因素下面哪一种表述是错误的？</span><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">钢的成分；<span lang="EN-US"><o:p></o:p></span></span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">凝固过程断面的液相厚度；</span>
C:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;凝固过程断面的温度梯度；<span lang="EN-US"><o:p></o:p></span></span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 24pt; TEXT-INDENT: -24pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: -2.0"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">高碳钢和低碳钢相比连铸时结晶器内凝固时气隙小、坯壳较厚、拉坯阻力大，要注意使用旧结晶器，稳定拉速，论述是否正确？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">① </span></p><p class="MsoNormal" style="LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">② </span></p>
A:论述正确；
B:论述不正确；

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">适当提高铸坯中心等轴晶区的比例，下面哪一种工艺措施的叙述是不正确的？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;适当降低浇注温度；<span lang="EN-US"><o:p></o:p></span></span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;采用电磁搅拌技术；<span lang="EN-US"><o:p></o:p></span></span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;结晶器内的变质处理；<span lang="EN-US"><o:p></o:p></span></span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;在大包处理钢水；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯凝固传热模型中的换热系数的取值一般来说都可以依据推荐值确定，不会影响它的准确性和实用性？判断对错？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;对；<span lang="EN-US"><o:p></o:p></span></span>
B:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">错；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">现阶段连铸用电磁搅拌器的供电方式有下面哪几种提法是对的？</span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%"><o:p></o:p></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l1 level1 lfo2"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l1 level1 lfo2"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%"><o:p></o:p></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l1 level1 lfo2"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%"><o:p></o:p></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l1 level1 lfo2"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"></span><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%"><o:p></o:p></span></p>
A:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">交流供电；</span>
B:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">低频供电；</span>
C:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">直流供电；</span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l1 level1 lfo2"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; mso-fareast-font-family: 'Times New Roman'"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">三相供电；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯中间裂纹的产生对于铸坯质量的影响很大，主要原因是下面哪几种？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;二冷某一段的回温过高；</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;二冷的设备存在问题；</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;拉坯速度过慢；<span lang="EN-US"><o:p></o:p></span></span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">钢水纯净度低；<span lang="EN-US"><o:p></o:p></span></span></p>

&nbsp; <p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">在铸坯凝固过程中宏观偏析的产生主要与下列哪些缺陷有密切的联系？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US" style="mso-bidi-font-weight: bold"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt; mso-list: l0 level1 lfo1"><span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">与&ldquo;凹陷&rdquo;缺陷有密切联系；<span lang="EN-US"><o:p></o:p></span></span></p>
B:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">与疏松缺陷有密切联系；</span>
C:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp;&nbsp;&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">与缩孔缺陷有密切联系；</span>
D:<span lang="EN-US" style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold; mso-bidi-font-family: 宋体"><span style="mso-list: Ignore"><span style="FONT: 7pt 'Times New Roman'">&nbsp; </span></span></span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">与裂纹缺陷有密切联系；</span>

&nbsp; <span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; 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">当钢种确定结晶器的换热强度下面的分析哪几种是正确的？</span></span><p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;进出水温差越大换热强度越大；</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;拉速越快换热强度越大；</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">过热度越高换热强度越大；</span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">液面波动约大换热强度越大；<span lang="EN-US"><o:p></o:p></span></span></p>

<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯在凝固传热过程中下面那些特点的描述是正确的呢？</span>
A:大传热量
B:在运动中传热
C:在外力作用下传热
D:伴随固态下相变

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯二冷区传热方式以下哪几种是正确的？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;对流传热方式；</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;辐射传热方式；</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;传导传热方式；</span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;等离子传热；<span lang="EN-US"><o:p></o:p></span></span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">修正铸坯凝固传热模型中的换热系数的方法下面那几种是不正确的？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">① 铸坯表面温度测量方法；<span lang="EN-US"><o:p></o:p></span></span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">射钉测量坯壳厚度方法；<span lang="EN-US"><o:p></o:p></span></span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">铸坯液芯长度测量方法；<span lang="EN-US"><o:p></o:p></span></span>
D:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">铸坯表面硬度测量方法；</span>
E:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;铸坯磁性测量方法；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯的凝固方式有下面哪几种？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">逐层凝固方式；</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">快速凝固方式；<span lang="EN-US"><o:p></o:p></span></span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">中间凝固方式；</span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">体积凝固方式；</span></p>

&nbsp; <p class="MsoNormal" style="MARGIN-LEFT: 36pt; TEXT-INDENT: -36pt; LINE-HEIGHT: 125%; tab-stops: list 36.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体; mso-bidi-font-weight: bold">碳钢在凝固过程中没有下面的哪些反应</span><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;包晶反应；<span lang="EN-US"><o:p></o:p></span></span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;共晶反应；</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">&nbsp;偏晶反应；<span lang="EN-US"><o:p></o:p></span></span>
D:<p class="MsoNormal" style="MARGIN-LEFT: 39pt; TEXT-INDENT: -18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">共析反应；</span></p>

&nbsp; <p class="MsoNormal" style="LINE-HEIGHT: 125%"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">连铸坯在凝固传热过程中下面那些特点的描述是正确的呢？<span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="TEXT-INDENT: 18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: 1.5"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="TEXT-INDENT: 18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: 1.5"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="TEXT-INDENT: 18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: 1.5"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" style="TEXT-INDENT: 18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: 1.5"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体"><span lang="EN-US"><o:p></o:p></span></span></p>
A:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">大传热量；</span>
B:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">在运动中传热；</span>
C:<span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">在外力作用下传热；</span>
D:<p class="MsoNormal" style="TEXT-INDENT: 18pt; LINE-HEIGHT: 125%; tab-stops: list 39.0pt; mso-char-indent-count: 1.5"><span style="FONT-SIZE: 12pt; LINE-HEIGHT: 125%; FONT-FAMILY: 宋体">伴随固态下相变；</span></p>