化工总控工培训理论部分试题及答案- vcm备用

武享吧 08/06/201423:28:50赛事预告68K 次浏览2阅读模式

151.下列蒸发器,溶液循环速度最快的是(  D   )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.标准式    B.悬框式    C.列文式    D.强制循环式文章源自武享吧-https://www.hula8.net/article/6365.html

152.膜式蒸发器中,适用于易结晶、结垢物料的是(   D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.升膜式蒸发器       B.降膜式蒸发器文章源自武享吧-https://www.hula8.net/article/6365.html

C.升降膜式蒸发器     D.回转式薄膜蒸发器文章源自武享吧-https://www.hula8.net/article/6365.html

153.减压蒸发不具有的优点是(  D   )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.减少传热面积        B.可蒸发不耐高温的溶液文章源自武享吧-https://www.hula8.net/article/6365.html

C.提高热能利用率      D.减少基建费和操作费文章源自武享吧-https://www.hula8.net/article/6365.html

154.就蒸发同样任务而言,单效蒸发生产能力W单与多效蒸发的生产能力W多(   C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.W单 > W多   B.W单 <W多   C.W单 =W多    D.不确定文章源自武享吧-https://www.hula8.net/article/6365.html

155.在相同的条件下蒸发同样任务的溶液时,多效蒸发的总温度差损失∑△多与单效蒸文章源自武享吧-https://www.hula8.net/article/6365.html

发的总温度差损失∑△单(   B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.∑△多=∑△单    B.∑△多>∑△单    C.∑△多<∑△单    D.不确定文章源自武享吧-https://www.hula8.net/article/6365.html

156.蒸发流程中除沫器的作用主要是(   A   )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.汽液分离    B.强化蒸发器传热     C.除去不凝性气体    D.利用二次蒸汽文章源自武享吧-https://www.hula8.net/article/6365.html

157.提高蒸发器生产强度的主要途径是增大(   C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.传热温度差    B.加热蒸汽压力    C.传热系数    D.传热面积文章源自武享吧-https://www.hula8.net/article/6365.html

158.标准式蒸发器适用于(   C  )的溶液的蒸发。文章源自武享吧-https://www.hula8.net/article/6365.html

A.易于结晶     B.黏度较大及易结垢     C.黏度较小    D.不易结晶文章源自武享吧-https://www.hula8.net/article/6365.html

159.对黏度随浓度增加而明显增大的溶液蒸发,不宜采用(  A  )加料的多效蒸发流程。文章源自武享吧-https://www.hula8.net/article/6365.html

A.并流    B.逆流    C.平流    D.错流文章源自武享吧-https://www.hula8.net/article/6365.html

160.对于吸收的有利条件是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.高压、低温    B.高压、高温    C.低压、高温    D.低压、低温文章源自武享吧-https://www.hula8.net/article/6365.html

161.单元操作精馏主要属于(  D  )的传递过程。文章源自武享吧-https://www.hula8.net/article/6365.html

A.热量    B.动量   C.能量    D.质量文章源自武享吧-https://www.hula8.net/article/6365.html

162.下列(  D  )为生产合成橡胶的主要单体。文章源自武享吧-https://www.hula8.net/article/6365.html

A.甲醇    B.乙烯    C.丙酮    D.丁二烯文章源自武享吧-https://www.hula8.net/article/6365.html

163.适宜的回流比是最小回流比的(  D  )倍。文章源自武享吧-https://www.hula8.net/article/6365.html

A.1.0-2.0    B.0.5-2.5    C.1.2-2.5    D.1.1-2文章源自武享吧-https://www.hula8.net/article/6365.html

164.精馏塔塔底产品纯度下降,可能是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.提馏段板数不足  B.精馏段板数不足  C.再沸器热量过多  D.塔釜温度升高文章源自武享吧-https://www.hula8.net/article/6365.html

165.下面(  A  )不是精馏装置所包括的设备。文章源自武享吧-https://www.hula8.net/article/6365.html

A.分离器    B.再沸器    C.冷凝器    D.精馏塔文章源自武享吧-https://www.hula8.net/article/6365.html

166.下列属于公用工程的是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.原料处理    B.净化处理    C.供水、供电    D.生产设备文章源自武享吧-https://www.hula8.net/article/6365.html

167.蒸馏分离的依据是混合物中各组分的(  B  )不同。文章源自武享吧-https://www.hula8.net/article/6365.html

A.浓度    B.挥发度    C.温度    D.溶解度文章源自武享吧-https://www.hula8.net/article/6365.html

168.干燥进行的条件是被干燥物料表面所产生的水蒸气分压(  C  )干燥介质中水蒸气分压。文章源自武享吧-https://www.hula8.net/article/6365.html

A.小于    B.等于    C.大于    D.不等于文章源自武享吧-https://www.hula8.net/article/6365.html

169.精馏过程中采用负压操作可以(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.使塔操作温度提高    B.使物料的沸点升高文章源自武享吧-https://www.hula8.net/article/6365.html

C.使物料的沸点降低    D.适当减少塔板数文章源自武享吧-https://www.hula8.net/article/6365.html

170.转化率指的是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.生产过程中转化掉的原料量占投入原料量的百分比文章源自武享吧-https://www.hula8.net/article/6365.html

B.生产过程中得到的产品量占理论上所应该得到的产品量的百分比文章源自武享吧-https://www.hula8.net/article/6365.html

C.生产过程中所得到的产品量占所投入原料量的百分比文章源自武享吧-https://www.hula8.net/article/6365.html

D.在催化剂作用下反应的收率 。文章源自武享吧-https://www.hula8.net/article/6365.html

171.影响干燥速率的主要因素除了湿物料、干燥设备外,还有一个重要因素是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.绝干物料    B.平衡水分    C.干燥介质    D.湿球温度文章源自武享吧-https://www.hula8.net/article/6365.html

172.下列操作中(  B  )可引起冲塔。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔顶回流量大    B.塔釜蒸汽量大    C.塔釜蒸汽量小    D.进料温度低文章源自武享吧-https://www.hula8.net/article/6365.html

173.反应物流经床层时,单位质量催化剂在单位时间内所获得的目的产物量称为(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.空速    B.催化剂负荷    C.催化剂空时收率    D.催化剂选择性文章源自武享吧-https://www.hula8.net/article/6365.html

174.流化床干燥器发生尾气含尘量大的原因是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.风量大    B.物料层高度不够   C.热风温度低    D.风量分布分配不均匀文章源自武享吧-https://www.hula8.net/article/6365.html

175.下列操作中(  C  )会造成塔底轻组分含量大。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔顶回流量小    B.塔釜蒸汽量大   C.回流量大    D.进料温度高文章源自武享吧-https://www.hula8.net/article/6365.html

176.精馏塔操作时,回流比与理论塔板数的关系是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.回流比增大时,理论塔板数也增多    B.回流比增大时,理论塔板数减少文章源自武享吧-https://www.hula8.net/article/6365.html

C.全回流时,理论塔板数最多,但此时无产品文章源自武享吧-https://www.hula8.net/article/6365.html

D.回流比为最小回流比时,理论塔板数最小文章源自武享吧-https://www.hula8.net/article/6365.html

177.若需从牛奶料液直接得到奶粉制品,选用(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.沸腾床干燥器    B.气流干燥器   C.转筒干燥器    D.喷雾干燥器文章源自武享吧-https://www.hula8.net/article/6365.html

178.精馏塔内上升蒸汽不足时将发生的不正常现象是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.液泛    B.泄漏    C.雾沫夹带    D.干板文章源自武享吧-https://www.hula8.net/article/6365.html

179.在下列条件中,影响恒速干燥阶段干燥速率的是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.湿物料的直径   B.湿物料的含水量   C.干燥介质流动速度   D.湿物料的结构文章源自武享吧-https://www.hula8.net/article/6365.html

180.精馏过程中,当其他条件不变时,回流比增加,塔顶易挥发组分浓度(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.减小   B.不变    C.增加    D.不能确定文章源自武享吧-https://www.hula8.net/article/6365.html

181.对于CO+2H2=CH30H,正反应为放热反应。通过(  D  )可提高甲醇的产率。文章源自武享吧-https://www.hula8.net/article/6365.html

A.升温、加压    B.降温、降压    C.升温、降压    D.降温、加压文章源自武享吧-https://www.hula8.net/article/6365.html

182.湿空气在预热过程中不变化的参数是(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.焓    B.相对湿度    C.湿球温度    D.露点文章源自武享吧-https://www.hula8.net/article/6365.html

183.精馏塔温度控制最关键的是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔顶温度    B.塔底温度    C.灵敏板温度    D.进料温度文章源自武享吧-https://www.hula8.net/article/6365.html

184.下列塔设备中,操作弹性最小的是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.筛板塔    B.浮阀塔    C.泡罩塔    D.舌板塔文章源自武享吧-https://www.hula8.net/article/6365.html

185.利用空气作介质干燥热敏性物料,且干燥处于降速阶段,欲缩短干燥时间,则可采取的最有效措施是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.提高介质温度        B.增大干燥面积,减薄物料厚度文章源自武享吧-https://www.hula8.net/article/6365.html

C.降低介质相对湿度    D.提高介质流速文章源自武享吧-https://www.hula8.net/article/6365.html

186.要小批量干燥晶体物料,该晶体在摩擦下易碎,但又希望产品保留较好的晶形,应选用(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.厢式干燥器    B.滚筒干燥器    C.气流干燥器    D.沸腾床干燥器文章源自武享吧-https://www.hula8.net/article/6365.html

187.在一定空气状态下,用对流干燥方法干燥湿物料时,能除去的水分为(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.结合水分    B.非结合水分    C.平衡水分    D.自由水分文章源自武享吧-https://www.hula8.net/article/6365.html

188.对于反应后分子数增加的反应,提高反应的平衡产率的方法有(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.增大压力   B.升高温度  C.充入惰性气体,并保持总压不变   D.采用催化剂文章源自武享吧-https://www.hula8.net/article/6365.html

189.反应温度过高对化工生产造成的不良影响可能是(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.催化剂烧结    B.副产物增多    C.爆炸危险性增大    D.以上都有可能文章源自武享吧-https://www.hula8.net/article/6365.html

190.下面原因不会引起降液管液泛的是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔板间距过小    B.严重漏液    C.过量雾沫夹带  D.液、气负荷过大文章源自武享吧-https://www.hula8.net/article/6365.html

191.关于原料配比,下述不正确的是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.多数条件下,原料的配比不等于化学计量系数比文章源自武享吧-https://www.hula8.net/article/6365.html

B.原料配比严格按化学计量系数比就能保证原料100%转化文章源自武享吧-https://www.hula8.net/article/6365.html

C.使价廉易得的反应物过量能保证反应经济合理文章源自武享吧-https://www.hula8.net/article/6365.html

D.恰当的原料配比可以避开混合气体的爆炸范围文章源自武享吧-https://www.hula8.net/article/6365.html

192.干燥热敏物料时,为了提高干燥速率,不宜采取的措施是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.提高干燥介质的温度        B.改变物料与干燥介质接触方式文章源自武享吧-https://www.hula8.net/article/6365.html

C.降低干燥介质的相对湿度    D.增大干燥介质的流速文章源自武享吧-https://www.hula8.net/article/6365.html

193.精馏操作时,若其他操作条件均不变,只将塔顶的过冷液体回流改为泡点回流,则塔顶产品组成变化(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.变小     B.不变     C.变大     D.不确定文章源自武享吧-https://www.hula8.net/article/6365.html

194.干燥介质经过预热后(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.降低湿度    B.降低相对湿度    C.提高进气温度    D.提高传热速率文章源自武享吧-https://www.hula8.net/article/6365.html

195.在实际生产过程中,为提高反应过程目的产物的单程收率,宜采用(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.延长反应时间,提高反应的转化率,从而提高目的产物的收率文章源自武享吧-https://www.hula8.net/article/6365.html

B.缩短反应时间,提高反应的选择性,从而提高目的产物的收率文章源自武享吧-https://www.hula8.net/article/6365.html

C.选择合适的反应时间和空速,从而使转化率与选择性的乘积(单程收率)达到最大文章源自武享吧-https://www.hula8.net/article/6365.html

D.选择适宜的反应器类型,从而提高目的产物的收率文章源自武享吧-https://www.hula8.net/article/6365.html

196.某筛板精馏塔在操作一段时间后,分离效率降低,且全塔压降增加,其原因及应采取的措施是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔板受腐蚀,孔径增大,产生漏液,应增加塔釜热负荷文章源自武享吧-https://www.hula8.net/article/6365.html

B.筛孔被堵塞,孔径减小,孔速增加,雾沫夹带严重,应降低负荷操作文章源自武享吧-https://www.hula8.net/article/6365.html

C.塔板脱落,理论板数减少,应停工检修文章源自武享吧-https://www.hula8.net/article/6365.html

D.降液管折断,气体短路,需要更换降液管文章源自武享吧-https://www.hula8.net/article/6365.html

197.对于木材干燥,应采用(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.干空气有利于干燥   B.湿空气有利于干燥  C.高温空气干燥   D.明火烤文章源自武享吧-https://www.hula8.net/article/6365.html

198.(  B  )表达了主副反应进行程度的相对大小,能确切反映原料的利用是否合理。文章源自武享吧-https://www.hula8.net/article/6365.html

A.转化率    B.选择性    C.收率    D.生产能力文章源自武享吧-https://www.hula8.net/article/6365.html

199.吸收过程是溶质从气相转移到(  B  )的质量传递过程。文章源自武享吧-https://www.hula8.net/article/6365.html

A.气相    B.液相    C.固相    D.任一相态文章源自武享吧-https://www.hula8.net/article/6365.html

200.吸收塔尾气超标,可能的原因是(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔压增大    B.吸收剂降温    C.吸收剂用量增大   D.吸收剂纯度下降文章源自武享吧-https://www.hula8.net/article/6365.html

201.吸收时,气体进气管管端向下切成45°倾斜角,其目的是为了防止(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.气体被液体夹带出塔  B.塔内下流液体进入管内  C.气液传质不充分   D.液泛文章源自武享吧-https://www.hula8.net/article/6365.html

202.在(  D  )两种干燥器中,固体颗粒和干燥介质呈悬浮状态接触。文章源自武享吧-https://www.hula8.net/article/6365.html

A.厢式与气流    B.厢式与流化床    C.洞道式与气流    D.气流与流化床文章源自武享吧-https://www.hula8.net/article/6365.html

203.吸收操作气速一般(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.大于泛点气速                  B.小于载点气速文章源自武享吧-https://www.hula8.net/article/6365.html

C.大于泛点气速而小于载点气速    D.大于载点气速而小于泛点气速文章源自武享吧-https://www.hula8.net/article/6365.html

204.只要组分在气相中的分压(   A  )液相中该组分的平衡分压,吸收就会继续进行,文章源自武享吧-https://www.hula8.net/article/6365.html

直至达到一个新的平衡为止。文章源自武享吧-https://www.hula8.net/article/6365.html

A.大于    B.小于    C.等于    D.不能确定文章源自武享吧-https://www.hula8.net/article/6365.html

205.吸收塔内,不同截面处吸收速率(   A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.各不相同    B.基本相同    C.完全相同    D.均为O文章源自武享吧-https://www.hula8.net/article/6365.html

206.其他条件不变,吸收剂用量增加,填料塔压强降(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.减小    B.不变    C.增加    D.不能确定文章源自武享吧-https://www.hula8.net/article/6365.html

207.严重的雾沫夹带将导致(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.塔压增大    B.板效率下降    C.液泛    D.板效率提高文章源自武享吧-https://www.hula8.net/article/6365.html

208.反映热空气容纳水气能力的参数是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.绝对湿度    B.相对湿度    C.湿容积    D.湿比热容文章源自武享吧-https://www.hula8.net/article/6365.html

209.内部扩散控制阶段影响干燥速率的主要因素有(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.空气的性质   B.物料的结构、形状和大小  C.干基含水量    D.湿基含水量文章源自武享吧-https://www.hula8.net/article/6365.html

210.正常操作的吸收塔,若因某种原因使液体量减少至液气比小于原定的最小液气比,下列(  C  )情况将发生。文章源自武享吧-https://www.hula8.net/article/6365.html

A.出塔液体浓度增加,回收率增加        B.出塔气体浓度增加,出塔液体浓度减小文章源自武享吧-https://www.hula8.net/article/6365.html

C.出塔气体浓度增加,出塔液体浓度增加  D.在塔的下部将发生解吸现象文章源自武享吧-https://www.hula8.net/article/6365.html

211.将氯化钙与湿物料放在一起,使物料中水分除去,这是采用(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.机械去湿    B.吸附去湿    C.供热干燥    D.无法确定文章源自武享吧-https://www.hula8.net/article/6365.html

212.难溶气体吸收是受(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.气膜控制    B.液膜控制    C.双膜控制    D.相界面文章源自武享吧-https://www.hula8.net/article/6365.html

213.吸收过程产生液泛现象的主要原因是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.液体流速过大    B.液体加入量不当  C.气体速度过大  D.温度控制不当文章源自武享吧-https://www.hula8.net/article/6365.html

214.吸收塔操作时,应(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.先通入气体后进入喷淋液体         B.先进入喷淋液体后通入气体文章源自武享吧-https://www.hula8.net/article/6365.html

C.增大喷淋量总是有利于吸收操作的   D.先进气体或液体都可以文章源自武享吧-https://www.hula8.net/article/6365.html

215.对处理易溶气体的吸收,为了显著地提高吸收速率,应增大(  A  )的流速。文章源自武享吧-https://www.hula8.net/article/6365.html

A.气相    B.液相    C.气液两相    D.不确定文章源自武享吧-https://www.hula8.net/article/6365.html

216.逆流填料塔的泛点气速与液体喷淋量的关系是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.喷淋量减小泛点气速减小    B.无关文章源自武享吧-https://www.hula8.net/article/6365.html

C.喷淋量减小泛点气速增大    D.喷淋量增大泛点气速增大文章源自武享吧-https://www.hula8.net/article/6365.html

217.(  C  )是反映吸收过程进行的难易程度的因数。文章源自武享吧-https://www.hula8.net/article/6365.html

A.传质单元高度    B.液气比数    C.传质单元数    D.脱吸因数文章源自武享吧-https://www.hula8.net/article/6365.html

218.吸收在逆流操作中,其他条件不变,只减小吸收剂用量(能正常操作),将引起(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.操作线斜率增大         B.塔底溶液出口浓度降低文章源自武享吧-https://www.hula8.net/article/6365.html

C.尾气浓度减小           D.吸收推动力减小文章源自武享吧-https://www.hula8.net/article/6365.html

219.吸收操作过程中,在塔的负荷范围内,当混合气处理量增大时,为保持回收率不变,可采取的措施有(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.减少操作温度    B.减少吸收剂用量   C.降低填料层高度   D.减少操作压力文章源自武享吧-https://www.hula8.net/article/6365.html

220.气液两相在筛板上接触,其分散相为液相的接触方式是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.鼓泡接触    B.喷射接触    C.泡沫接触    D.以上三种都不对文章源自武享吧-https://www.hula8.net/article/6365.html

221.萃取操作包括若干步骤,除了(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.原料预热    B.原料与萃取剂混合    C.澄清分离    D.萃取剂回收文章源自武享吧-https://www.hula8.net/article/6365.html

222.有4种萃取剂,对溶质A和稀释剂B表现出下列特征,则最合适的萃取剂应选择(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.同时大量溶解A和B       B.对A和B的溶解都很小文章源自武享吧-https://www.hula8.net/article/6365.html

C.大量溶解A少量溶解B     D.大量溶解B少量溶解A文章源自武享吧-https://www.hula8.net/article/6365.html

223.萃取操作温度升高时,两相区(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.减小    B.不变    C.增加    D.不能确定文章源自武享吧-https://www.hula8.net/article/6365.html

224.进行萃取操作时,应使(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.分配系数大于1   B.分配系数小于1  C.选择性系数大于1   D.选择性系数小于1文章源自武享吧-https://www.hula8.net/article/6365.html

225.萃取是利用各组分间的(  C  )差异来分离液体混合物的。文章源自武享吧-https://www.hula8.net/article/6365.html

A.挥发度    B.离散度    C.溶解度    D.密度文章源自武享吧-https://www.hula8.net/article/6365.html

226.萃取剂加入量应使原料和萃取剂的交点M位于(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.溶解度曲线的上方区    B.溶解度曲线上   C.溶解度曲线的下方区    D.座标线上文章源自武享吧-https://www.hula8.net/article/6365.html

227.对于同样的萃取相含量,单级萃取所需的溶剂量(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.比较小    B.比较大    C.不确定    D.相等文章源自武享吧-https://www.hula8.net/article/6365.html

228.多级逆流萃取与单级萃取比较,如果溶剂比、萃取相浓度一样,则多级逆流萃取可使萃余相浓度(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.变大    B.变小    C.不变    D.无法确定文章源自武享吧-https://www.hula8.net/article/6365.html

229.萃取剂S与稀释剂B的互溶度愈(  B  ),分层区面积愈(    ),可能得到的萃取液的最高浓度ymax较高。文章源自武享吧-https://www.hula8.net/article/6365.html

A.大、大    B.小、大    C.小、小   D.大、小文章源自武享吧-https://www.hula8.net/article/6365.html

230.将具有热敏性的液体混合物加以分离,常采用(  C  )方法。文章源自武享吧-https://www.hula8.net/article/6365.html

A.蒸馏    B.蒸发    C.萃取    D.吸收文章源自武享吧-https://www.hula8.net/article/6365.html

231.精馏操作中液体混合物被加热到(  C  )时,可实现精馏的目的。文章源自武享吧-https://www.hula8.net/article/6365.html

A.泡点    B.露点    C.泡点和露点间  D.高于露点文章源自武享吧-https://www.hula8.net/article/6365.html

232.区别精馏与普通蒸馏的必要条件是(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.相对挥发度小于1         B.操作压力小于饱和蒸气压文章源自武享吧-https://www.hula8.net/article/6365.html

C.操作温度大于泡点温度    D.回流文章源自武享吧-https://www.hula8.net/article/6365.html

233.两组分液体混合物,其相对挥发度α越大,表示用普通蒸馏方法进行分离(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.较容易    B.较困难    C.很困难    D.不能够文章源自武享吧-https://www.hula8.net/article/6365.html

234.在再沸器中溶液(  C  )而产生上升蒸气,是精馏得以连续稳定操作的一个必不可少条件。文章源自武享吧-https://www.hula8.net/article/6365.html

A.部分冷凝    B.全部冷凝   C.部分汽化    D.全部汽化文章源自武享吧-https://www.hula8.net/article/6365.html

235.在精馏过程中,回流的作用是(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.提供下降的液体   B.提供上升的蒸汽   C.提供塔顶产品    D.提供塔底产品文章源自武享吧-https://www.hula8.net/article/6365.html

236.(   C  )可能导致液泛。文章源自武享吧-https://www.hula8.net/article/6365.html

A.液体流量过小    B.气体流量太小    C.过量液沫夹带    D.严重漏液文章源自武享吧-https://www.hula8.net/article/6365.html

237.当回流从全回流逐渐减小时,精馏段操作线向平衡线靠近,为达到给定的分离要求,所需的理论板数(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.逐渐减少    B.逐渐增多    C.不变    D.无法判断文章源自武享吧-https://www.hula8.net/article/6365.html

238.某常压精馏塔,塔顶设全凝器,现测得其塔顶温度升高,则塔顶产品中难挥发组分的含量将(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.升高    B.降低    C.不变     D.以上答案都不对文章源自武享吧-https://www.hula8.net/article/6365.html

239.在精馏操作中,若进料组成、馏出液组成与釜液组成均不变,在气液混合进料中,液相分率(q)增加,则最小回流比Rmin(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.增大    B.减小   C.不变    D.无法判断文章源自武享吧-https://www.hula8.net/article/6365.html

240.化工污染物都是在生产过程中产生的,其主要来源(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.化学反应副产品、化学反应不完全         B.燃烧废气、产品和中间产品文章源自武享吧-https://www.hula8.net/article/6365.html

C.化学反应副产品、燃烧废气产品和中间产品文章源自武享吧-https://www.hula8.net/article/6365.html

D.化学反应不完全的副产品、燃烧的废气、产品和中间产品文章源自武享吧-https://www.hula8.net/article/6365.html

241.适宜的回流比取决于(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.生产能力   B.生产能力和操作费用   C.塔板数    D.操作费用和设备折旧费文章源自武享吧-https://www.hula8.net/article/6365.html

242.如果精馏塔进料组成发生变化,轻组分增加,则(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.釜温下降    B.釜温升高    C.釜压升高    D.顶温升高文章源自武享吧-https://www.hula8.net/article/6365.html

243.精馏塔釜压升高将导致塔釜温度(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.不变    B.下降    C.升高    D.无法确定文章源自武享吧-https://www.hula8.net/article/6365.html

244.根据牛顿冷却定律,其中式中是(  D  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.间壁两侧的温度差      B.两流体的温度差文章源自武享吧-https://www.hula8.net/article/6365.html

C.两流体的平均温度差    D.流体主体与壁面之间的温度差文章源自武享吧-https://www.hula8.net/article/6365.html

245.用孔板流量计测量气体流量,当测量气体温度升高,则所测得结果与实际流量相比(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.无变化    B.不确定   C.偏低    D.偏高文章源自武享吧-https://www.hula8.net/article/6365.html

246.减小垢层热阻的目的是(  C  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.提高传热面积    B.减小传热面积    C.提高传热系数    D.增大温度差文章源自武享吧-https://www.hula8.net/article/6365.html

247.根据亨利定律,当气液处于平衡时,可吸收组分在液相中的浓度与其在气相中的平衡分压成(  A  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.正比    B.反比    C.平方的正比    D.平方的反比文章源自武享吧-https://www.hula8.net/article/6365.html

248.单元操作精馏是属于(  B  )过程。文章源自武享吧-https://www.hula8.net/article/6365.html

A.单向传质    B.双向传质    C.热量传递    D.分子传递文章源自武享吧-https://www.hula8.net/article/6365.html

249.如果计算出泵的安装高度为负值,说明(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.计算错误                B.此泵应安装在液面以下文章源自武享吧-https://www.hula8.net/article/6365.html

C.此泵应安装在液面以上    D.此泵无法安装文章源自武享吧-https://www.hula8.net/article/6365.html

250.导致透平压缩机喘振现象的原因是(  B  )。文章源自武享吧-https://www.hula8.net/article/6365.html

A.吸气量太大,致使管网压强大于压缩机出口压强文章源自武享吧-https://www.hula8.net/article/6365.html

B.吸气量减小,致使管网压强大于压缩机出口压强文章源自武享吧-https://www.hula8.net/article/6365.html

C.吸气量太大,致使管网压强小于压缩机出口压强文章源自武享吧-https://www.hula8.net/article/6365.html

D.吸气量减小,致使管网压强小于压缩机出口压强文章源自武享吧-https://www.hula8.net/article/6365.html

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