20春学期《工业通风与除尘Ⅰ》在线平时作业2

adminhan

在有害物产生地<span class="GramE">点直接</span>将他们捕集起来，经过净化处理，排至室外，这种通风方法称为<u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span></u><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">局部通风</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span>
B:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">全面通风</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">自然通风</span>
D:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">稀释通风</span>

根据工业与民用建筑的使用要求，通风和空调系统的风管有时需要把<u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的空气，沿风管侧壁的成排孔口或短管均匀送出。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等温</span>
B:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等湿</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等速</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span>
D:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等量</span>

对于<span class="GramE">冷过程</span>的通风柜，应将吸风口布设在通风柜的<u><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u>，才能有效地控制有害物。<span lang="EN-US"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt">上部</span>
B:下部<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span>
C:中间
D:上下均可

粉尘在空气中的含量即含尘浓度有两种表示方法，一种是质量浓度，另一种是<strong style="mso-bidi-font-weight: normal"><u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u></strong><strong style="mso-bidi-font-weight: normal"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span></strong><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:<p><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">颗粒浓度</span></p>
B:<span class="SpellE">ppm</span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">体积浓度</span>
D:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分散度</span>

<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt">凡属机械破碎筛分的粉尘大多符合<u><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp; </span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></u>，特别是舍弃两端的粗大和细小尘粒以后。<span lang="EN-US"><o:p></o:p></span></span>
A:<span style="FONT-FAMILY: 宋体; FONT-SIZE: 10.5pt; 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">正态分布<span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span></span>
B:对数正态分布
C:威布尔分布
D:不确定的分布

局部排风系统主要由<u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、风管、净化设备和风机构成。</span>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">密闭罩</span>
B:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">局部排风罩</span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">接受罩</span>
D:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">槽边排风罩</span>

为了保证各送、排风点达到预期的风量，两并联支管的阻力必须保持平衡。设计时，除尘系统并联支管的压力差不应超过<u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:5%
B:10%<span style="mso-spacerun: yes">&nbsp;</span>
C:15%<span style="mso-spacerun: yes">&nbsp;</span>
D:20%

槽边排风罩分为单侧和双侧两种，单侧<span class="GramE">适用于槽宽</span><u><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></u><span lang="EN-US"><span style="mso-spacerun: yes">&nbsp;。</span></span>
A:B<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt">&le;<st1:chmetcnv unitname="mm" sourcevalue="700" hasspace="False" negative="False" numbertype="1" tcsc="0" w:st="on"><span lang="EN-US">700mm</span></st1:chmetcnv></span>
B:<span class="SpellE">B</span>&le;<st1:chmetcnv unitname="mm" sourcevalue="800" hasspace="False" negative="False" numbertype="1" tcsc="0" w:st="on"><span lang="EN-US">800mm</span></st1:chmetcnv>
C:B&le;<st1:chmetcnv unitname="mm" sourcevalue="900" hasspace="False" negative="False" numbertype="1" tcsc="0" w:st="on"><span lang="EN-US">900mm</span></st1:chmetcnv>
D:B&le;<st1:chmetcnv unitname="mm" sourcevalue="1200" hasspace="False" negative="False" numbertype="1" tcsc="0" w:st="on"><span lang="EN-US">1200mm</span></st1:chmetcnv>

在有害物产生地<span class="GramE">点直接</span>将他们捕集起来，经过净化处理，排至室外，这种通风方法称为<u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span></u><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">局部通风</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;</span></span>
B:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">全面通风</span></span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">自然通风</span>
D:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">稀释通风</span>

卫生标准中规定的车间空气中有害物的最高容许浓度，是从工人在此浓度下<strong style="mso-bidi-font-weight: normal"><u><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></u></strong><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行生产劳动，不会引起急性或慢性职业病为基础制定的。</span>
A:<p><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">长期</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;</span></span></p>
B:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">短期</span>
C:<span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">间歇</span>
D:<span class="GramE"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一</span></span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">日内</span>

人体的冷热感觉与空气的温度、相对湿度、流速和周围物体表面温度等因素有关。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

槽边排风罩是外部吸气罩的一种特殊形式，专门用于各种工业槽。<span lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

轴流风机的风量和风压范围大<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">, </span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在通风工程中被广泛应用。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

风机转速改变时，风机的流量、风压和效率都将随之改变。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

转速系指风机叶轮每分钟的转数。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

根据风机的压力<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">, </span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">可将风机分为低压风机、中压风机和高压风机，低压风机压力&le;</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US">1000Pa</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt"> <span lang="EN-US"><o:p></o:p></span></span>
A:错误
B:正确

局部排风系统需要的风量小、效果好，设计时应优先考虑。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

在正常运行条件下，除尘器的漏风率不应大于<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">10%</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span>
A:错误
B:正确

为了保证各送排风管达到预期的风量，两并联支管的阻力必须保持平衡，设计时，除尘系统两支管的阻力差应不超过<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">15%</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

各并联支管的阻力总是相等的。
A:错误
B:正确

由于滤料的使用温度限制，处理高温烟气时，必须先冷却到滤料可能承受的温度。<span lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

事故排风必须的排风量应由经常使用的排风系统或事故排风系统保证。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

进风口处室外空气中有害物质浓度不应大于室内作业地点最高允许浓度的<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">30%</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

要使全面通风效果良好，只需要足够的通风量。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

粉尘对人体健康的危害只同粉尘的性质、粒径大小有关。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

通风机的风量指通风机在单位时间内所输送的气体体积。<span style="mso-bidi-font-size: 10.5pt"> <span lang="EN-US"><o:p></o:p></span></span>
A:错误
B:正确

由于工艺条件的限制，生产设备不能密闭时，可把排风罩设在有害无源附近，将有害物接收到罩内。
A:错误
B:正确

矩形风管与原型风管在相同断面面积时，矩形风管阻力小、材料省、强度也大。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

在现场测量时，各管件之间距离很短，不易找到比较稳定的测定断面，用静压法测定流量有一定困难。此时，可选用动压法求得排风罩的风量。<span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><o:p></o:p></span>
A:错误
B:正确

机械通风是依靠室内外空气的温度差<span style="mso-bidi-font-size: 10.5pt" lang="EN-US">(</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">实际是密度差</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US">)</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">造成的热压，或者是室外风造成的风压，使房间内外的空气进行交换，从而改善室内的空气环境。</span><span style="mso-bidi-font-size: 10.5pt" lang="EN-US"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span><o:p></o:p></span>
A:错误
B:正确