【单选题】【消耗次数:1】
叶片泵分为完成一次吸、排油液的单作用叶片泵和完成两次吸、排油液的双作用叶片泵。该说法( )
正确
错误
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相关题目
【单选题】 双作用叶片泵的转子每转一周完成吸、排油各( )次。
①  1
②  2
③  4
【单选题】 双作用叶片泵的转子每转一周完成吸、排油各( )次。
①  1
②  2
③  4
【单选题】 转子每转一周,每个工作空间要完成两次吸油和压油,称之为双作用叶片泵。该说法( )
①  正确
②  错误
【单选题】 单作用叶片泵可以通过改变( )来改变排量。
①  转速
②  转矩
③  偏心距
【单选题】 单作用叶片泵可以通过改变( )来改变排量。
①  转速
②  转矩
③  偏心距
【判断题】 双联叶片泵是由两个单级叶片泵装在一个泵体内在油路上串联组成。该说法( )
①  正确
②  错误
【单选题】 从排量是否可变来看,双作用叶片泵只能作为( )。
①  单向泵
②  定量泵
③  变量泵
【判断题】 单作用叶片泵和径向柱塞泵是通过改变转子和定子的偏心距来实现变量
①  正确
②  错误
【单选题】 双级叶片是由两个普通压力的单级叶片泵装在一个泵体内在油路上串接而成的。该说法( )
①  正确
②  错误
【单选题】 由于转子受有不平衡得径向液压作用力,所以单作用叶片泵一般不宜用于高压。该说法( )
①  正确
②  错误
随机题目
【单选题】 Alicereceived an invitation from her boss, ____came as a surprise.?
①  it ?
②  that ?
③  which ?
④  he?
【单选题】 —What day is today?—Today is____.
①  March 25th
②  Saturday
③  fine
④  cold
【单选题】 This painting is ____ of his work.
①  critical
②  logical
③  typical
④  feature
【单选题】 ____ is essential to a successful scientist; he cannot hope to make any progress if he cannot work in a controlled way.
①  Discipline
②  Decision
③  Declaration
④  Dependence
【单选题】 The airport is five miles ____ my house.
①  away from
②  far from
③  far away from
④  far from away
【单选题】 Many a customer____ about the poor quality of the washing machine.
①  complains
②  complain
③  are complaining
④  have complained
【单选题】 ____ by this, he couldn’t say anything.
①  Satisfied
②  Feared
③  Frightened
④  Encouraged
【单选题】 George is so ____ in debt that he is afraid to show up in the pub in case he meets his six creditors.
①  involved
②  concentrated
③  devoted
④  concerned
【单选题】 Every one was ____that day.
①  in great spirit
②  in all spirit
③  in high a spirit
④  in high spirit
【单选题】 23. The singer and dancer ____ our evening party.
①  is to attend
②  was attend
③  were to attend
④  are attend