【判断题】【消耗次数:1】
液压系统中75%以上的故障是和液压油的污染有关。该说法( )
正确
错误
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相关题目
【单选题】 液压系统中75%以上的故障是和液压油的污染有关。该说法( )
①  正确
②  错误
【判断题】 液压系统最主要的失效根源是液压油泄露。该说法( )
①  正确
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【判断题】 过滤器的功用在于过滤混在液压油中的杂质,使进入到液压系统中的油液的污染度降低,保证系统正常地工作。该说法( )
①  正确
②  错误
【判断题】 过滤器的功用在于过滤混在液压油中的杂质,使进入到液压系统中的油液的污染度降低,保证系统正常地工作。该说法( )
①  正确
②  错误
【单选题】 要使液压油不产生大量气泡,它的压力最低不得低于液压油所在的温度下的空气分离压。该说法( )
①  正确
②  错误
【判断题】 塔吊顶升油缸液压油型号是46#抗磨液压油().
①  正确
②  错误
【单选题】 含有气泡的液压油的体积弹性模量将减小,所含的气泡越多,液压油的体积弹性模量将越高。该说法( )
①  正确
②  错误
【单选题】 液压油从压力较高处流向系统中压力较低处或大气中,称为内泄露。该说法( )
①  正确
②  错误
【判断题】 液控单向阀的控制口通液压油时,液压油可以单向流动。
①  正确
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【单选题】 对液压油不正确的要求是( )。
①  合适的粘度
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【单选题】 3. She was so pleased that she felt like _______.
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【单选题】 23. English has become _____ international language of business.
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【单选题】 4.He was working on a children’s book______ Limericks.
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