【单选题】【消耗次数:1】
以下哪个方式不可以强化传热( )。
增加换热器的数量
减小污垢热阻
在壳程中加装折流挡板
增大平均温度差
参考答案:
复制
纠错
相关题目
【单选题】 列管式换热器内,装设了两块横向折流挡板,则该换热器的壳程为( )。
①  三程
②  四程
③  单程
④  双程
【单选题】 在列管式换热器中,有关折流挡板的描述正确的是( )。
①  增加流体流速
②  设置于壳体内
③  设置于管内
【单选题】 以下冷热流体的流动方式中,平均温度差计算不需要矫正的是( )。
①  折流
②  并流
③  错流
【单选题】 多层平壁稳态传热时,单层壁热阻越大,其两侧温度差越大。( )
①  正确
②  错误
【判断题】 逆流操作可以获得较大的平均传热温度差,从传递相同热负荷言,须较大的传热面积,节省设备费用( )。
①  正确
②  错误
【单选题】 对流换热器强化传热机理是( )。
①  改变流体压力
②  破坏或减小边界层
③  增加流速
④  改变流体的热物性
【单选题】 换热器传热方式不包括( )。
①  回流
②  逆流
③  错流
④  折流
【单选题】 将换热器壳程介质变为气相,通常采用( )。
①  釜式换热器
②  填料函式换热器
③  U型管换热器
④  固定管板式换热器
【单选题】 以下不可以作为输出流对象的是()
①  文件
②  内存
③  键盘
④  显示器
【单选题】 php代码的开始标记以下哪个不可以( )。
①  ?php
②  %
③  ?
④  eof
随机题目
【单选题】 Waiter: ___Customer: No, thank you. I have already known what to order.
①  Do you like this kind of dishes?
②  You are welcome to our restaurant. Take seat, please.
③  Would you like to see a menu?
④  Everybody! Order, please!
【单选题】 When he came back after an absence of 20 years, he found his hometown completely ____. ?
①  changing ?
②  to be changed ?
③  to change ?
④  changed ?
【单选题】 We have studied English for only one year, ____ we can perform English short play already.?
①  for ?
②  and ?
③  yet ?
④  or?
【单选题】 With the old man ____ the way, we had no trouble in finding that mysterious cave.
①  leading
②  led
③  lead
④  to be led
【单选题】 How can he ____if he is not ____?
①  listen--hearing
②  hear--listening
③  be listening--heard
④  be hearing--listened to
【单选题】 Lily: Hello, John! What was the weather like yesterday?John: ____
①  I like nice and bright weather.
②  You don’t like cold weather, do you?
③  That was a favorable weather.
④  Nice and bright, not too cold.
【单选题】 10. Far away around the corner I could see a small female ____advancing towards us.
①  body
②  figure
③  man
④  symbol
【单选题】 It is often more difficult to find trained men than ____ for scientific research.
①  getting financial support
②  to getting financial support
③  to get financial support
④  in getting financial support
【单选题】 “Here is the money I promised,” he said. “I always ____ promises.”
①  agree
②  follow
③  make
④  keep
【单选题】 This advertisement is a ____ example of their marketing plan.
①  social
②  typical
③  natural
④  historical