【单选题】【消耗次数:1】
解决室外热网水力不平衡的最有效方法是:在各建筑物进口处的供热总管上装设( )。
节流孔板
平衡阀
截止阀
电磁阀
参考答案:
复制
纠错
相关题目
【单选题】 液压卡紧产生的主要原因有:径向力不平衡引起的液压卡紧;油液中极性分子的吸附作用;油液中杂质楔入配合间隙;滑阀移动时的附加阻力;干式电磁阀上的电磁推杆偏斜;阀芯、阀孔加工质量较差。该说法( )
①  正确
②  错误
【判断题】 电液动换向阀是由电磁阀和液动阀组合而成。
①  正确
②  错误
【单选题】 在三位三通电磁阀式防抱死制动系统中,电磁阀阀芯的最大移动量为:
①  0.25mm
②  2.5mm
③  0.1mm
【单选题】 在安装自动调节阀时,通常再并联一截止阀,其作用是( )。
①  检修时临时使用
②  保持加热介质经常通过
③  没有用不设置
④  增加流通量的作用
【判断题】 EGR线性电磁阀直接控制EGR的系统中,去掉了EGR阀
①  正确
②  错误
【判断题】 EGR电磁阀是一个三位三通阀
①  正确
②  错误
【判断题】 与占空比控制电磁阀型怠速控制阀相比,开关型怠速控制阀控制的旁通空气量更多
①  正确
②  错误
【判断题】 调速阀是由 等差减压阀 和节流阀 串联 而成。
①  正确
②  错误
【判断题】 调速阀是由等差式减压阀和节流阀串联而成,。
①  正确
②  错误
【判断题】 旁通型调速阀是由 溢流阀 和节流阀 并联 而成。
①  正确
②  错误
随机题目
【单选题】 _____native to North America, corn has now spread all over the world.
①  In spite of
②  That it is
③  It was
④  Although
【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】 By the time you graduate, we _____in Australia for one year.
①  will be staying
②  will have stayed
③  would have stayed
④  have stayed
【单选题】 If you want children to work hard you must _____their interests instead of their sense of duty.
①  appeal to
②  look into
③  give rise to
④  go in for
【单选题】 Watch out, the boss is disguised _____ your behavior.
①  to
②  at
③  for
④  with
【单选题】 Classification is a useful _____to the organization of knowledge in any field.
①  means
②  approach
③  mode
④  manner
【单选题】 Although the main characters in the fiction are so true to life, they are certainly _____.
①  imagining
②  imaginative
③  imaginable
④  imaginary
【单选题】 I was to have a trip abroad if _____.
①  I had not been fired
②  I was not fired
③  my boss won’t have fired me
④  I were not fired
【单选题】 He made a quick _____from his illness.
①  relief
②  recovery
③  survival
④  relaxation
【单选题】 “If we fail to act now, “said Tom, “We’ll find ourselves _____in action later on.”
①  paid back
②  paid for
③  paid up
④  paid off