【单选题】【消耗次数:1】
气压控制换向阀是利用气体压力来使主阀芯运动而使气体改变流向。该说法( )
正确
错误
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相关题目
【判断题】 气动换向阀按其控制方式不同可以分为电磁换向阀、气动换向阀、机动换向阀和手动换向阀。该说法( )
①  正确
②  错误
【单选题】 关于气压控制换向阀按控制方式分类错误说法的是( )
①  机械控制
②  卸压控制
③  差压控制
④  加压控制
【单选题】 换向阀按换向阀所控制的通路数不同可分为:二通换向阀、三通换向阀、四通换向阀、五通换向阀。该说法( )
①  正确
②  错误
【判断题】 气动换向阀与液压换向阀相似。该说法( )
①  正确
②  错误
【判断题】 换向阀按操作方式可分为:手动换向阀、机动换向阀、电磁动换向阀、液动换向阀、电液动换向阀等。该说法( )
①  正确
②  错误
【单选题】 换向阀按阀芯相对于阀体的运动方式可分为( )
①  控制阀
②  双控制阀
③  滑阀
【判断题】 换向型方向控制阀的功用是改变气体通道使气体流动方向发生变化从而改变气动执行元件的运动方向。该说法( )
①  正确
②  错误
【单选题】 气动换向阀按其作用特点可以分为单向型控制阀和换向型控制阀。该说法( )
①  正确
②  错误
【判断题】 方向控制回路是利用换向阀使执行元件(气缸或气马达)改变运动方向的控制回路。
①  正确
②  错误
【判断题】 换向阀借助于阀芯和阀体之间的相对移动来控制油路的通断,或改变油液的方向,从而控制执行元件的运动方向。
①  正确
②  错误
随机题目
【单选题】 Alice is a __________ person and never makes any unreasonable demands.
①  sensible
②  sensitive
③  severe
④  solemn
【单选题】 People are spending more of their income on goods such as cars and household ________ .
①  facilities
②  appliances
③  instruments
④  equipment
【单选题】 As you know, when college students __________ their future employment, they often think of status and income.
①  apply
②  demand
③  anticipate
④  suppose
【单选题】 David and Sheila are unable to have children, but they’re hoping to __________ a little boy.
①  cultivate
②  raise
③  adopt
④  acquire
【单选题】 I don’t know why she avoids __________ her opinion on the subject.
①  to give
②  to be given
③  giving
④  being given
【单选题】 He told me how he had given me shelter and protection without which I __________ of hunger.
①  would be died
②  would die
③  would have died
④  will die
【单选题】 Candidates are required to ____________ the application form first.
①  take in
②  put in
③  fill in
④  give in
【单选题】 Although Jack made a foolish mistake, we __________ at him.
①  ought to have laughed
②  oughtn’t to have laughed
③  ought to laugh
④  should not to laugh
【单选题】 , the sales manager began his report with the statistics of last month’s sales.
①  By now
②  As usual
③  So far
④  At most
【单选题】 What can I do for you, madam?
①  I want a kilo of apples
②  You can go your own way
③  Thanks
④  Excuse me. I’m busy