搜题
用户您好， 请在下方输入框内搜索其它题目：
搜题
题目内容 （请给出正确答案）
提问人：网友 发布时间：
【单选题】

The valve which is most suited for regulating the flow through a pipeline is a （）

A、gate valve

B、globe valve

C、swing-check valve

D、plug-cock valve

查看正确答案
更多“The valve which is most suited for regulating the flow through a pipeline is a （）”相关的问题
第1题
[单选题] m>Valvem> overlap m>ism> m>them> period during m>whichm> （）.

A、m>them> inlet m>valvem> m>ism> open  B、m>them> exhaust m>valvem> m>ism> open  C、both m>valvem>s are closed  D、both m>valvem>s are open  

点击查看答案
第2题
[单选题] m>Whichm> one of following statement m>ism> not true concerning m>them> suitable sites of m>them> direct acting relief m>valvem> and m>them> pilot operated relieve m>valvem>?（）

A、m>them> direct acting relief m>valvem> m>ism> used for controlling lower flows and pressure  B、m>them> pilot operated relief m>valvem> m>ism> used for controlling higher flows and pressure  C、m>them> pilot operated relief m>valvem> m>ism> used for controlling lower flows and pressure  D、m>them> controlling accuracy of direct acting relief m>valvem> m>ism> worse than that of m>them> pilot operated relief m>valvem>  

点击查看答案
第3题
[单选题] m>Them> globe m>valvem> has a bulbous body, housing a m>valvem> seat and screw down plug or dm>ism>c arranged at right angles to m>them> axm>ism> of m>them> pipeAccording to m>them> above sentence, m>whichm> of m>them> following statements m>ism> not true?（）

A、m>Them> profile of m>them> m>valvem> m>ism> like a globe  B、m>Them> m>valvem> seat m>ism> set into m>them> bulbous body  C、m>Them> plug or dm>ism>c of m>them> m>valvem> m>ism> made vertical to m>them> axm>ism> of m>them> pipe  D、m>Them> m>valvem> seat m>ism> located at right side of m>them> plug or dm>ism>c  

点击查看答案
第4题
[单选题] A butterfly m>valvem> consm>ism>ts basically of a dm>ism>c pivoted across m>them> bore of a ring body having m>them> same radial dimensions as m>them> pipe in m>whichm> it m>ism> fitted.According to m>them> above sentence, m>whichm> of m>them> following statements m>ism> not true?（）

A、m>Them> diameter of a dm>ism>c m>ism> m>them> same as m>them> outer diameter of m>them> pipe  B、We can infer that m>them> m>valvem> m>ism> opened or closed by rotating m>them> spindle  C、A butterfly m>valvem> comprm>ism>es a dm>ism>c and a ring body  D、m>Them> profile of m>them> butterfly m>valvem> m>ism> a ring body  

点击查看答案
第5题
[单选题] Unlike m>them> globe m>valvem>, gate m>valvem>s give full bore flow without change of direction, such a m>valvem> m>ism> not suitable to partially open operationAccording to m>them> above sentence, m>whichm> of m>them> following statements m>ism> not true?（）

A、m>Them> globe m>valvem> may be suitable for partially open operation  B、m>Them> globe m>valvem> will give full bore flow with change of direction  C、m>Them> gate m>valvem> gives full bore flow with change of direction  D、m>Them> gate m>valvem> m>ism> suitable for full bore operation only  

点击查看答案
第6题
[单选题] m>Whichm> of m>them> lm>ism>ted components m>ism> considered to separate m>them> high pressure side of a refrigeration cycle from m>them> low pressure side of m>them> cycle?（）

A、m>Them> condenser and m>them> expansion m>valvem>  B、m>Them> king m>valvem> and m>them> solenoid m>valvem>  C、m>Them> compressor and m>them> expansion m>valvem>  D、m>Them> condenser and m>them> solenoid m>valvem>  

点击查看答案
第7题
[单选题] m>Whichm> of m>them> following statements concerning butterfly m>valvem>s m>ism> correct?（）

A、Special tools are required for lapping or grinding  B、It m>ism> impossible to throttle flow with a butterfly m>valvem>  C、To close m>them> m>valvem>, it m>ism> only necessary to turn m>them> handle a quarter of a turn  D、m>Them> butterfly m>valvem> should never be used in a freshwater system  

点击查看答案
第8题
[单选题] A built-up exhaust m>valvem> m>ism> one in m>whichm> （）.

A、m>them> stem and heads are made of different material  B、low-alloy steel m>ism> used throughout  C、a replaceable m>valvem> dm>ism>k m>ism> welded to m>them> head  D、m>them> self-centering action comes from motion of m>them> m>valvem> stem in m>them> guide  

点击查看答案
第9题
[单选题] m>Them> period of m>valvem> overlap m>ism> when （）.

A、m>them> inlet m>valvem> m>ism> open  B、m>them> exhaust m>valvem> m>ism> open  C、both m>valvem>s are close  D、both m>valvem>s are open  

点击查看答案
账号：
答题记录 我的收藏 我的题库
客服
TOP

请使用微信扫码支付

订单号：
遇到问题请联系在线客服