【单选题】【消耗次数:1】
齿轮泵存在着三个可能产生泄漏的部位:齿轮端面和端盖间:齿轮外圆和壳体内孔间以及两个轮的齿面啮合处。该说法( )
正确
错误
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相关题目
【单选题】 外啮合齿轮泵的工作原理:它由装在壳体内的一对齿轮所组成,齿轮两侧有端盖壳体、端盖和齿轮的各个齿间槽组成了许多密封工作腔。该说法( )
①  正确
②  错误
【判断题】 齿轮泵产生泄漏的间隙为端面间隙和径向间隙,此外还存在啮合间隙,其中端面泄漏占总泄漏量的80%~85%。
①  正确
②  错误
【单选题】 由于泄漏的存在,齿轮泵通常作为( )泵使用。
①  低压
②  中压
③  高压
【单选题】 由于泄漏的存在,齿轮泵通常作为( )泵使用。
①  低压
②  中压
③  高压
【单选题】 外合齿轮泵的泄、困油和径向液压力不平衡是影响齿轮泵性能指标和寿命的三大问题。该说法( )
①  正确
②  错误
【单选题】 下列不符合外啮合齿轮泵特点的是 ( )。
①  容积效率高
②  困油现象
③  存在径向不平衡力
【单选题】 下列不符合外啮合齿轮泵特点的是 ( )。
①  容积效率高
②  困油现象
③  存在径向不平衡力
【判断题】 对于差速器而言,为了保证行星齿轮能同时与两个半轴齿轮啮合,两个半轴齿轮的齿数和必须能被行星齿轮数整除,否不能装配
①  正确
②  错误
【单选题】 间隙过小,齿轮端面和端盖之间的机械摩擦损失增加,会使泵的机械效率降低。该说法( )
①  正确
②  错误
【单选题】 ( )主要用于滚切直齿和斜齿外啮合圆柱齿轮及涡轮。
①  滚齿机
②  插齿机
③  拉齿机
随机题目
【单选题】 我国刑法规定应该受刑事责任的最低年龄是( )。
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②  已满14周岁不满16周岁
③  已满16周岁
④  已满18周岁
【单选题】 To their credit the Department of Energy _____these ideas and funded a detailed study.
①  took over
②  took on
③  took up
④  took to
【单选题】 If the scheme is _____carried out without waste of time or energy I shall be completely satisfied.
①  relatively
②  noticeably
③  appropriately
④  efficiently
【单选题】 When we drove to the country, we saw many _____.
①  herds of cattles
②  herds of catt
③  herd of cattle
④  herd of cattles
【单选题】 Televisions enable us to see things happen almost at the exact moment _____.
①  which they are happening
②  they are happening
③  which they happen
④  they have happened
【单选题】 To their credit the Department of Energy _____these ideas and funded a detailed study.
①  took over
②  took on
③  took up
④  took to
【单选题】 Once our chickens started laying eggs, we had such a _____of eggs that we were giving many away to our neighbors.
①  output
②  surplus
③  production
④  plenty
【单选题】 Individual lines of the poem were very beautiful, but I didn’t see how the lines fit together. To me, the poem wasnt _____.
①  inherent
②  coherent
③  logical
④  corporate
【单选题】 This book has been in the works so long that I have lost _____of most of the sources found for me by the staff of the library.
①  trace
②  trail
③  track
④  touch
【单选题】 _____ for a long time, the fields are all dried up.
①  There has been no rain
②  Having no rain
③  There having been no rain
④  There being no rain