【单选题】【消耗次数:1】
往复式压缩机压缩过程是( )过程。
多变
等热
仅是体积减少压力增大
绝热
参考答案:
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相关题目
【单选题】 往复式压缩机压缩过程是( )过程。
①  等热
②  多变
③  绝热
④  仅是体积减少压力增大
【单选题】 往复式压缩机开车时( )出口阀门。
①  关闭
②  打开
③  可开可关
【判断题】 往复式压缩机的实际工作循环由吸气、压缩、排气三个过程组成。( )
①  正确
②  错误
【单选题】 往复式压缩机曲轴的组件中不包括( )。
①  曲柄
②  曲柄销
③  轴颈
④  飞轮
【单选题】 启动往复式压缩机前其出口阀必须( )。
①  微开
②  关闭
③  打开
④  无所谓
【单选题】 往复式压缩机压缩比越高,排出的气体温度越( )。
① 
② 
③  不变
【单选题】 往复式压缩机产生排气量不够的原因( )。
①  气缸内有水
②  安全阀不严
③  冷却水量不够
④  吸入气体过脏
【单选题】 一往复式压缩机排气量为60m3/min,它属于( )压缩机。
①  中型
②  小型
③  大型
④  微型
【单选题】 往复式压缩机填料所不具有的功用是( )。
①  支撑
②  自润滑
③  隔振
④  密封
【单选题】 较高压缩比时,往复式压缩机分段而离心式压缩机一般不分段。( )
①  正确
②  错误
随机题目
【单选题】 23. Mary is just ___________ before. She needs more exercises.
①  pale than
②  as pale as
【单选题】 12. That’s ______ joke I have ever heard.
①  the funniest
②  more funny
③  a funniest
④  funnier
【单选题】 3.We are living in an age where only a strong economy will ____.
①  value
②  cherish
③  count
④  have
【单选题】 31. He was very religious. He used to go to _____ church every Sunday.
①  the
②  a
③  /
④  one
【单选题】 14. I don’t believe him. He is_____ liar.
①  the
②  one
③  a
④  . /
【单选题】 3. She was so pleased that she felt like _______.
①  to find someone to talk
②  to find some to talk to
③  finding someone to talk
④  finding someone to talk to
【单选题】 1.The authors purpose of writing
①  To predict how children under the future educational system would feel
②  to tell us a story about Tommy and Maggie
③  to display the availability of the net courses
【单选题】 23. English has become _____ international language of business.
①  the
②  . a
③  /
④  . one
【单选题】 8.The girl was dancing about excitedly when suddenly she stood_______ and put on a horrified look.
①  silent
②  still
③  quiet
④  calm
【单选题】 4.He was working on a children’s book______ Limericks.
①  tagged
②  headed
③  labeled
④  entitled