We will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \sistance\o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \o strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control careeagainst; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of \To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. o further standardize trading, and strive to achieve \o law, standardize and fair.\on of performance management, to ensure that potential employees \o strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\cadres in enterprise development in the 《 液压与气动技术 》课程模拟试卷二
参考答案
考试形式：开卷（ ）闭卷（ ）半开卷（ ）上机（ ）出卷人
题 一 二 三 四 五 六 总分 复核号 人 得 分
一、单项选择题（请在所选择正确答案的序号前面划√或将正确答案的序号填入问题的空格内）（每选择一个正确答案3分，共27分）
1、液压系统的工作压力取决于 C 。
A、泵的额定压力 B、溢流阀的调定 C、负载
2、液压系统的最大工作压力为10MPa，安全阀的调定压力应为 C 。
A、等于10MPa B、小于10MPa C、大于10MPa
f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we cleD、其他
3、 B 在常态时，阀口是常开的，进、出油口相通； A 、 C 在常态状态时，阀口是常闭的，进、出油口不通。
A、 溢流阀； B、减压阀； C、顺序阀 4、液压系统利用液体的 C 来传递动力。 A、位能 B、动能 C、压力能 D、热能
5、一液压系统的回路上需要安装一背压阀，现有的控制元件是溢
流阀、减压阀、顺序阀和单向阀，可以选做背压阀的元件是 B 。
A、溢流阀、减压阀和顺序阀 B、溢流阀、顺序阀和单向阀
C、溢流阀、单向阀和减压阀
D、只有溢流阀 6、 一水平放置的双杆液压缸，采用三位四通电磁换向阀，要求阀处于中位时，液压泵卸荷，液压缸浮动，其中位机能应选用 H型；要求阀处于中位时，液压泵卸荷，且液压缸闭锁不动，其中位机
能应选用 B 。
on company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happyarly feel the pulse of the XX power generatiWe will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \sistance\o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \o strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control careeagainst; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of \To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. o further standardize trading, and strive to achieve \o law, standardize and fair.\on of performance management, to ensure that potential employees \o strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\cadres in enterprise development in the A、 O型 B、 M型 C、 Y型 7、通常设置在气源装置与系统之间的所谓\气动三联件\是指组（ × ）
4、气动单向顺序阀是由一个单向阀和一个顺序阀阀组合而成。 合在一起的分水滤气器、 A 、和油雾器。 A、减压阀 B、调压阀 C、三通阀
8、背压阀的作用是使液压缸的回油腔具有一定的 A ，保证运动部件工作平稳。
A、压力 B、速度 C、真空
9、在定量泵供油的系统中，用流量控制阀实现对定量执行元件的速度进行调节．这种回路称为C 。
A、调压回路 B、调速回路 C、节流回路 二、判断题（正确记√，错误记×；每题1分，共10分）
1、液压传动系统适用于传动比要求严格的场合使用。 （ × ）
2、双作用叶片泵因两个吸油窗和两个压油窗对称分布，转子和轴承所受的径向液压力相平衡。（√ ）
3、液压缸差动连接时，液压缸的推力比非差动连接时的推力大。 f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we cle（ √ ）
5、 定量泵与变量马达组成的容积调速回路中，其转矩恒定不变。 （ × ）
6、当液控顺序阀的出油口与油箱连接时，称为卸荷阀。 （√ ）
7、节流阀的作用是调节流量和加载。 （ √ ）
8、一般的气源装置主要由空气压缩机、冷却器、储气罐、干燥器和油水分离器等组成。 （ √ ）
9、常用的隔离式蓄能器有活塞式和柱塞式。
（ × ） 10、增压回路用提高系统中局部油路中的压力。它能使局部压力远远高于系统的压力。 （ √ ）
on company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happyarly feel the pulse of the XX power generatiWe will continue to improve the company's internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication \sistance\o constantly perfect ERP, and BFS++, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS++, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure \o strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control careeagainst; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of \To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. o further standardize trading, and strive to achieve \o law, standardize and fair.\on of performance management, to ensure that potential employees \o strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards ... Work, full play party, and branch, and members in \prise%uction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening \ood\cadres in enterprise development in the
三、分析作图题（36分）
1、请用一定量泵、一个油箱、一个先导式溢流阀、两个远程调压阀和一个中位机能是“Ｏ”型的三位四通电磁换向阀组成三级调2、如图所示为二级减压回路，说明阀1、2、3调定压力的大小顺序，在图示位置时，支路压力由哪个阀调定？（10分） 顺序为P3 >P1 >P2，在图示位置时，支路压力由阀1调定。
压回路。（10分） 至系统 f backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. To further strengthen publicity and education, improve the overall legal system. We must strengthen safety management, establish and improve the education, supervision, and evaluation as one of the traffic safety management mechanism. o conscientiously sum up the Olympic security controls, promoting integrated management to a higher level, higher standards, a higher level of development. Employees, today is lunar calendar on December 24, the ox Bell is about to ring, at this time of year, we cle
3、试分别说出下列是两个什么气压传动回路？（每小题5分，共10分）。 a) 左图是采用单向节流阀的双向调速回路； b) 右图是采用排气节流阀on company to flourish, to more clearly hear XX power generation companies mature and symmetry breathing. Recalling past one another across a railing, we are enthusiastic and full of confidence. Future development opportunities, we more exciting fight more spirited. Employees, let us together across 2013 full of challenges and opportunities, to create a green, low-cost operation, full of humane care of a world-class power generation company and work hard! The occasion of the Spring Festival, my sincere wish that you and the families of the staff in the new year, good health, happy, happy至系arly feel the pulse of the XX power generati