化工仪表及自动化试题_1.pdf

《化工仪表及自动化试题_1.pdf》由会员分享，可在线阅读，更多相关《化工仪表及自动化试题_1.pdf（41页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、化工仪表及自动化试题 0 化工仪表及自动化试题 一(选择题,每题 2 分，共 50 分)1.生产过程中所保持定值的工艺变量称为 A、操作变量 B、被控变量 C、设定值 D、对象 2.热电偶的测温原理是 A、电阻随温变化 B、热电效应 C、霍尔效应 D、节流原理 3.气动差压变送器的工作原理是 A、热电效应 B、电阻随温度变化 C、电压平衡 D、力矩平衡原理 4。利用差压变送器测液位时，若正、负压室与取压点之间装有隔离 罐并充以隔离液，这时需时变送器进行的迁移是 A、正迁移 B、负迁移 C、无迁移 D、零点迁移 5.在单元组合仪表中常用的统一标准信号为 A、010mV 或 420mV B、010

2、mV 或 020mV C、010mA 或 420mA D、010mA 或020mA 6(弹簧压力表中游丝的作用是:()A(提高仪表的精度 B(改变仪表的量程 C(克服仪表变差 D(提高仪表灵敏度 7(自动电位差计所配测温元件为()A(热电偶 B(热电阻 C(弹簧 D(膜片 8(节流式流量计工作原理为()A(把输入微小位移转换成相应的气压信号输出 B(电阻随温度变化 C.电压平衡 D(流体流经节流装置所产生的静压差与流量之间的关系 9(自动控制系统中，感受被控变量并转换为测量值的部分为()A(检测元件及变送器 B(调节器 C(对象 D(执行器 10(标注在化工仪表面板上的符号 1.5 是指该仪表

3、的()A 变差为 1.5 级 B 精度为 1.5 级 C(基本误差为 1.5 级 D(附加误差为 1.5 级 11(某一温度计，其测量范围为 0-400?，经校验发现其最大绝对误差为 5，则?该表的精度等级是()。A.0.5 B.0.8 C.1.0 D.1.5 12.节流式流量计测量的是流体流经节流装置时所产生的()A(速度变化 B(面积变化 C(动压能变化 D(静压差 13(自动控制系统，理想过渡过程的衰减比 n:1 是()A(24:1 B。4-10:1 C。2:1 D。12:1 14(过渡过程中被控变量最大指示值与设定值之差的指标是:()A(余差 B。衰减比 C。过渡时间 D。最大偏差 1

4、5(热电阻适用的测温范围是()A(500?以上中高温 B.500?以下中低温 C.300?以下中高温 D.300?以下中低温 16.气动差压变送器将测量信号转换为标准气压信号的原理是()A(电压平衡 B(力矩平衡 C(节流原理 D(电桥平衡 17(压力表测压点应该选在被测介质流动的()A(直管处 B.接近阀门处 C.任意处 D.拐弯处 18.热电偶冷端温度补偿解决的问题是()A(冷端温度为零 B.冷端温度为正 C(冷端温度不为零 D.冷端温度为负 19.补偿导线的热电特性在()范围内同热电偶本身几乎完全一样。A(0-200?B.0-250?C.0-100?D.20-100?20(一台电子自动电

5、位差压计精确度等级为0.5 级，测量范围为 0-500?，经校验发现最大绝对误差为 4?，问该表应定为几级:A(0.5 级 B.0.8 级 C.1.0 级 D.1.5 级 21(动圈表与热电偶配套使用时，表外接线电阻为()A.15 B.10 C.5 D.2.5 22(热电偶在配用动圈式显示仪表测量温度时，参比端温度补偿的方法采用:()A(冰浴法 B.查表法 C.补偿电桥法 D.校正仪表零点法 23(热电偶的测温原理是基于:A(热电偶的变形法 B.热电偶的热电效应 C(热电偶的热电阻特性 D.以上都不是 24(某工艺测量温度，要求测量范围在 0-300?，最大绝对误差不能大于 6?，则仪表应选用

6、的精度等级为:()A(2.0 级 B.1.5 级 C.2.5 级 D.4.0 级 25(单位时间内流体在某一截面上流过的体积是:()A(质量流量 B.体积流量 C.流速 D.质量流速 二(填空题(每空 1 分)1、一个简单的自动控制系统至少必须具有检测元件及变送器、调节器、执行器 和对象四个部分。2、差压变送器有数种，它们的主要区另在于膜盒(或膜片)的尺寸不同，变送器的膜盒最小，变送器的膜盒最大。3、弹簧管压力在测量稳定压力时，正常操作压力应该为量程的2/3;在测量高压时，正常操作压力不应超过量程的3/5。4(压力表安装时，若测量介质有腐蚀性或粘度较大，应加装适当的 隔离器和隔离液。5(转子流

7、量计工作时，被测流体应匀速流过转子与锥形管之间的环隙。6(在选用仪表量程时，应尽量让被测工艺变量处于仪表量程的1/3.7(工业测量仪表的变差规定不得超过该仪表本身的允许误差，否则应予以检修。8(一般在被测压力稳定的情况下，正常操作压力值为量程的2/3。9(普通热电偶由热电极，绝缘管，保护套和接线盒等部分组成。10(显示仪表按其显示方式可分为模拟，数字和图象显 示三大类。11(衡量数字显示仪表性能的技术指标有灵敏度和灵敏限，精确度，变差和分辨力，输入阻抗，采样速度等项。12(目前生产的化工检测仪表，按所测量变量的不同，大致可分为 物位，流量，温度，压力，化学成分及物性检测仪表五类。三(简答题 1

8、(热电阻的测温原理是什么,热电阻的温度计有哪几部分组成,工业上常用的热电阻有哪几种,2(简要说明弹簧管压力表的测压原理。选择时应主要考虑哪几个方面,3(压力表安装有哪些注意事项,4(什么是液位测量时差压变送器的零点迁移,如何实现迁移，迁移弹簧的作用是什么,5(什么叫参比端温度补偿,参比端温度补偿的方法有哪几种,6(什么是测量误差，精确度等级及回差,四(综合分析题(每题 10 分，共 30 分)1(用差压变送器测量贮槽内液体液位时，(1)若正，负压室的差压?P,0，应如何迁移,具体怎样操作,(2)若仪表量程为 0-8KPa,迁移量为 2kpa,当 h=0 时，输入差压?P 是多少,(3)若仪表量

9、程为 05kpa,迁移量为-3kpa,当 h 为最大时，输出的气压信号为多大,2(某一标尺为 01000 度的温度计出厂前经检验某刻度标尺上的各点测量结果分别为:被校表读数/度 0 200 400 600 700 800 900 1000 标准表读数/度 0 201 402 604 706 805 903 1001(1)求出该温度计的最大绝对误差值。(2)确定该温度计的精度等级。3(如果某反映器最大压力为 15MPa,要求最大绝对误差不超过?0.5MPa,现用一只2.5 级，025MPa 的弹簧管压力表进行测量，通过计算说明该表能否满足对测量误差的要求？应选用几级压力表？并说明按量程选择弹簧管

10、压力表时应注意的问题。(英文版)Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions,the implementation of comprehensive strictly strategic plan,implementation in accordance with the rules and discipline to manage the party,strengthen inner-party sup

11、ervision of major initiatives.The two regulations supporting each other,the adhere to a positive advocate,focusing on morality is of Party members and Party leading cadres can see,enough to get a high standard;around the party discipline,disciplinary ruler requirements,listed as negative list,focusi

12、ng on vertical gauge,draw the party organizations and Party members do not touch the bottom line.Here,the main from four square face two party rules of interpretation:the first part introduces two party Revised regulations the necessity and the revision process;the second part is the interpretation

13、of the two fundamental principles of the revision of laws and regulations in the party;the third part introduces two party regulations modified the main changes and needs to grasp several key problems;the fourth part on how to grasp the implementation of the two regulations of the party.and revised

14、the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus.Two party regulations revision work lasted a Years,pooling the

15、 wisdom of the whole party,ideological consensus,draw historical experience,respect for the wisdom of our predecessors,which reflects the unity of inheritance and innovation;follow the correct direction,grasp the limited goals,adhere to the partys leadership,to solve the masses of the people reflect

16、 a focus on the problem.The new revision of the and,reflects the partys 18 and the eighth session of the third,the spirit of the fourth plenary session,reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech,reflects the partys eighteen year

17、s comprehensive strictly practice.(a)revised two regulations of the party need of in based on revised,the promulgation and implementation of January 2010,to strengthen the construction of the contingent of leading cadres play an important role.But with the party to manage the party strictly administ

18、ering the deepening,has not been able to fully meet the actual needs.Content is too complicated,eight prohibition,52 are not allowed to hard to remember,and also difficult to put into practice;the second is concisely positive advocated by the lack of prohibited provisions excessive,no autonomy requi

19、rements;the third is banned terms and discipline law,both with the party discipline,disciplinary regulations repeat and Criminal law and other laws and regulations repeat;the fourth is to clean the theme is not prominent,not for the existing problems,and is narrow,only needle of county-level leading

20、 cadres above.is in 1997 based on revision,in December 2003 the promulgation and implementation,to strengthen the construction of the party play very important role.Along with the development of the situation,which many provisions have been unable to fully meet the comprehensive strictly administeri

21、ng the practice needs.One is Ji law,more than half of the provisions and criminal law and other countries laws and regulations Repetition;two is the political discipline regulations is not prominent,not specific,for violation of the party constitution,damage the authority of Party Constitution of mi

22、sconduct lack necessary and serious responsibility to pursue;third is the main discipline for the leading cadres,does not cover all Party members.Based on the above situation,need to and the two is likely to be more relevant regulations first amendment.By revising,really put the authority of Party d

23、iscipline,the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party compasses party consciousness.(II)two party regulations revision process the Central Committee of the Communist Party of China attaches great importance to two regulati

24、ons revision.Xi Jinping,general books recorded in the Fifth Plenary Session of the eighth session of the Central Commission for Discipline Inspection,on the revised regulations made clear instructions.According to the central deployment,the Central Commission for Discipline Inspection from 2014 unde

25、r six months begin study two regulations revision.The Standing Committee of the Central Commission for Discipline Inspection 4 review revised.Comrade Wang Qishan 14 times held a special meeting to study two regulations revision,amendment clarifies the direction,major issues of principle,path and tar

26、get,respectively held a forum will listen to part of the province(area)secretary of the Party committee,Secretary of the Discipline Inspection Commission,part of the central ministries and state organs Department The first party committee is mainly responsible for people,views of experts and scholar

27、s and grassroots party organizations and Party members.Approved by the Central Committee of the Communist Party of China,on 7 September 2015,the general office of the Central Committee of the Party issued a notice to solicit the provinces(autonomous regions,municipalities)Party,the central ministrie

28、s and commissions,state ministries and commissions of the Party(party),the General Political Department of the military,every 3 people organization of Party of two regulations revision opinion.Central Commission for Discipline Inspection of extensive solicitation of opinions,careful study,attracting

29、,formed a revised sent reviewers.In October 8 and October 12,Central Committee Political Bureau Standing Committee and the Political Bureau of the Central Committee After consideration of the two regulations revised draft.On October 18,the Central Committee of the Communist Party of China formally i

30、ssued two regulations.Can say,two laws amendment concentrated the wisdom of the whole party,embodies the party.Second,and revision of the basic principles of two party regulations revision work and implement the partys eighteen,ten eight plenary,the spirit of the Fourth Plenary Session of the Eleven

31、th Central Committee and General Secretary Xi Jinping important instructions on the revised and,highlighting the ruling party characteristics,serious discipline,the discipline quite in front of the law,based on the current,a long-term,advance as a whole,with Bu Xiuding independent and.Main principle

32、 is:first,adhere to the party constitution to follow.The constitution about discipline and self-discipline required specific,awaken the party constitution of party compasses party consciousness,maintaining the authority of the constitution.General Secretary Xi Jinping pointed out that no rules,no si

33、de round.Party constitution is the fundamental law,the party must follow the general rules.In early 2015 held the eighth session of the Central Commission for Discipline Inspection Fifth Plenary Session of the 16th Central Committee,Xi Jinping again pointed out that constitution is the party must fo

34、llow the general rules,but also the general rules.the revision of the and is Method in adhere to the regulations established for the purpose of combining rule of virtue is to adhere to the party constitution as a fundamental to follow,the constitution authority set up,wake up the party constitution

35、and party rules the sense of discipline,the party constitution about discipline and self-discipline specific requirements.4 second is to adhere to in accordance with the regulations governing the party and the party.The Party of rule of virtue de,mainly refers to the partys ideals and beliefs,excell

36、ent traditional style.The revised the closely linked to the self-discipline,insisting on the positive initiative,for all members,highlight the vital few,emphasized self-discipline,focusing on the morality,and the majority of Party members and the ideological and moral standards.The revised Ji method

37、 separately,Ji,Ji Yan to Method,as a negative list,emphasizing the heteronomy,focusing on vertical gauge.Is this one high and one low,a positive reaction,the strict party discipline and practice results transformation for the integration of the whole party to observe moral and discipline requirement

38、s,for the majority of Party members and cadres provides benchmarking and ruler.Third,insist on to.In view of the problems existing in the party at the present stage,the main problems of Party members and cadres in the aspect of self-discipline and abide by the discipline to make clearly defined,espe

39、cially the partys eighteen years strict political discipline and political rules,organization and discipline and to implement the central eight provisions of the spirit against the four winds and other requirements into Disciplinary provisions.Not one pace reachs the designated position,focusing on

40、in line with reality,pragmatic and effective.After the revision of major changes,major changes in the and modified and needs to grasp several key problems(a)adhere to according to regulations governing the party and party with morals in combination,for at the present stage,the leadership of the part

41、y members and cadres and Party members in existing main problems of self-discipline,put forward principles,requirements and specifications,showing Communists noble moral pursuit,reflected at all times and in all over the world ethics from high from low 5 common requirements.One is closely linked to

42、the self-discipline,removal and no direct relation to the provisions of.the second is adhere to a positive advocate,eight prohibition 52 are not allowed to about the content of the negative list moved into synchronization amendment.Three is for all the party members,will apply object from the leader

43、ship of the party members and cadres to expand to all Party members,fully embodies the comprehensive strictly required.The fourth is prominent key minority,seize the leadership of the party members and cadres is the key,and put forward higher requirements than the ordinary Party members.Five is to s

44、implify,and strive to achieve concise,easy to understand,easy to remember.The revised is the ruling Party since the first insists on a positive advocate forAll Party members and the self-discipline norms,moral declaration issued to all members of the party and the National Peoples solemn commitment.

45、criterion of a clean and honest administration consists of 4 parts,18,more than 3600 words.After the revision of the,a total of eight,281 words,including lead,specification and Party member cadre clean fingered self-discipline norms,etc.Part 3 members low-cost clean and self-discipline,the main cont

46、ents can be summarized as four must eight code.Lead part,reiterated on ideal and faith,fundamental purpose,the fine traditions and work style,noble sentiments,such as four must the principle of requirements,strong tone of self-discipline,The higher request for 6 and supervised tenet,the foothold in

47、permanent Bao the partys advanced nature and purity,to reflect the revised standards requirements.Members of self-discipline norms around the party members how to correctly treat and deal with the public and private,cheap and rot thrifty and extravagance bitter music,put forward the four norms.Party

48、 leader cadre clean fingered self-discipline norms for the leadership of the party members and cadres of the vital few,around the clean politics,from civil servant of the color,the exercise of power,moral integrity,a good family tradition and other aspects of the leadership of the party members and

49、cadres of the four norms to fully adapt to the strictly requirements,reflects the according to the regulations governing the law of recognition of deepening,the realization of the discipline construction and Jin Ju.is party a ruler,members of the basic line and follow.And the majority of Party membe

50、rs and cadres of Party organizations at all levels should adhere to the bottom line of thinking,fear discipline,hold the bottom line,as a preventive measure,to keep the partys advanced nature and purity.1,respect for the constitution,refinement and discipline.Revised from comprehensive comb physical