【判断题】【消耗次数:1】
冷凝器冷却不良时,可能会造成高压管路中的压力过高
正确
错误
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相关题目
【判断题】 冷凝器冷却不良时,可能会造成高压管路中压力过高。()
①  正确
②  错误
【单选题】 师傅甲说:发动机长时间大负荷工作,会造成机油压力过低的情况;师傅乙 说:新修的发动机在刚开始工作的初期,可能会造成发动机机油压力过高的情况
①  甲说的对
②  乙说的对
③  甲乙说的都对
④  甲乙说的都不对
【单选题】 机油压力过高,可能是下面的哪种原因造成的
①  发动机各轴承处的间隙过大
②  机油报警装置失效
③  机油粘度过小
④  机油泵磨损或工作不良
【单选题】 反应温度过高对化工生产造成的不良影响可能是(? ?)?。
①  副产物增多
②  以上都有可能
③  催化剂烧结
④  爆炸危险性增大
【单选题】 压缩机,附属装置(冷凝器、 热交换器、蒸发器)等,以“( )”计量。
① 
② 
【判断题】 冷凝器的作用是将制冷剂负荷增大时,可自动增加制冷剂的喷出量
①  正确
②  错误
【单选题】 气压传动系统若不经过处理而直接进入管路系统时,不可能造成的不良后果( )
①  油液挥发的油蒸汽聚集在气罐中形成易燃易爆物质,可能造成事故
②  油液被高温汽化后形成有机酸,对金属器件起腐蚀作用。
③  油、水和灰尘的混合物沉积在管道内将减小管道内径,使气阻增大或管路堵塞
④  在气温比较高时,水汽凝结后会使管道及附件因冻结而损坏,或造成气流不畅通以及产生误动作
⑤  较大的杂质颗粒会引起气缸、气马达、气控阀等元件的相对运动,而造成表面磨损,从而降低设备的使用寿命;或者堵塞控制元件的通道,直接影响元件的性能,甚至使控制失灵
【单选题】 反应容器在操作过程中要严格控制温度,( )可能会造成压力容器超压,而导致爆炸事故发生。
①  温度过低
②  温度过高
【多选题】 期末存货计价过高,可能会引起( )。
①  当期利润增加
②  当期利润减少
③  当期所有者权益减少
④  当期所得税增加
⑤  期末资产增加
【判断题】 制冷系统的四大部件为压缩机、冷凝器、蒸发器、膨胀阀。
①  正确
②  错误
随机题目
【单选题】 What are the ways of practicing stress?
①  Use gestures
②  Use the voice
③  Use the blackboard
④  All of the above.
【单选题】 Which of the following belong to pronunciation perception practice?
①  using minimal pairs, odd one out
②  Which order, completion
③  Same or different
④  All of the above.
【单选题】 Which of the following is the time when students work as a whole class?
①  When all the students are under the control of the teacher
②  When students work in pairs on an exercise or a task
③  When students work in small groups
④  When students are expected to work on their own at their own speed.
【单选题】 What role does a teacher play in the following activity? While doing a writing task either individually or in groups, the students need to use a particular word they don’t know. So they ask the teacher.
①  Controller
②  Assessor
③  participant
④  Resource-provider.
【单选题】 What role does a teacher play in the following activity? The teacher asks a student a question “Have you ever bought clothes with problems?” If the student doesn’t seem to be ready, the teacher says “for example, a shirt without...” and points to the buttons on his own shirt or jacket.
①  Controller
②  Assessor
③  Organizer
④  Prompter.
【单选题】 What role does a teacher play in the following activity? T: do you have any hobbies? S: yes, I like singing and dancing. T: Uhm, and...? S: I also collect coins. T: Oh, really, how many...have you already...collected?
①  Controller
②  Assessor
③  Organizer
④  Prompter
【单选题】 Which of the following is the advantage of whole class work?
①  It is an ideal way to show materials and do presentations together
②  It allows students to work together rather than under teacher’s guidance.
③  There is always a great chance of different opinions and contributions to the work
④  It is less stressful.
【单选题】 Which of the following is the time when students work in groups?
①  When all the students are under the control of the teacher
②  When students work in pairs on an exercise or a task
③  When students work in small group
④  When students are expected to work on their own at their own speed.
【单选题】 What role does a teacher play in the following activity? The teacher gives students 2 minutes to skim a text, and when time is up, he asks students to stop and answer some questions.
①  Controller
②  Assessor
③  Organizer
④  Prompter
【单选题】 What are the possible roles of a teacher?
①  Controller, assessor
②  Organizer, prompter
③  Participant, resource-provider
④  All of the above.