网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
输气管中生成水合物的真实情况The real situation of hydrate formation in gas pipeline：（）
A.气体在管内高速度流动，不可能在某一点生成水合物，而往往在数十米的管段上形成水合物。The gas flows in the tube at a high speed, so it is impossible to form hydrate at a certain point.#B.形成水合物会改变压降曲线形状。Hydrate formation changes the shape of the pressure drop curve.#C.生成水合物时伴随有热效应，要放出热量。熔解水合物时，要吸收热量。水合物的熔解热为335KJ/kg，对管线温降曲线有影响。The formation of hydrate is accompanied by a thermal effect, to release heat. When you melt hydrate, you absorb heat. The melting heat of hydrate is参考答案和解析
输气管段中形成天然气水合物的内因（必要条件）：（1）必须有液态水与天然气接触（2）天然气中的水蒸气分压等于或超过在水合物体系中与天然气的温度对应的水的饱和蒸汽压（3）天然气的温度必须等于会低于其在给定压力下的水合物形成温度。外因：（1）高流速、气流扰动或压力脉动（2）出现小的水合物晶种（3）天然气中含有硫化氢和二氧化碳，因为这两种酸性气体比烃类气体更容易溶于水。
更多 “输气管中生成水合物的真实情况The real situation of hydrate formation in gas pipeline：（）A.气体在管内高速度流动，不可能在某一点生成水合物，而往往在数十米的管段上形成水合物。The gas flows in the tube at a high speed, so it is impossible to form hydrate at a certain point.#B.形成水合物会改变压降曲线形状。Hydrate formation changes the shape of the pressure drop curve.#C.生成水合物时伴随有热效应，要放出热量。熔解水合物时，要吸收热量。水合物的熔解热为335KJ/kg，对管线温降曲线有影响。The formation of hydrate is accompanied by a thermal effect, to release heat. When you melt hydrate, you absorb heat. The melting heat of hydrate is” 相关考题
考题
reading is the skill that the students will buy judged upon most in real－life situation.()
此题为判断题(对，错)。
考题
The effect that exhaust gas recirculation can reduce NOX formation is partly due to a reduction of the()concentration in the combustion zone and partly due to the content of water and carbon dioxide in the exhaust gas.A.OxygenB.NitrogenC.SulphurD.Freon
考题
The______is used to measure the volume of a liquid or gas through a pipeline within any given period of timeA.flow-meterB.viscometerC.micrometerD.feeler
考题
Utterance is based on （）;it is the realization of the abstract meaning of a sentence in a real situation of communication,or simply in a context.
考题
单选题Which of the following is the main idea of the passage?A
The Dakota Access Pipeline will create more markets for oil and gas.B
The Dakota Access Pipeline will create many job opportunities.C
American Indians oppose the construction of an oil pipeline.D
American Indians fight for equal voting rights.
考题
单选题The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.A
flowmeterB
viscometerC
micrometerD
feeler
考题
单选题The valve best suited for throttling gas or liquid flow in a pipeline is the（）.A
gate valveB
globe valveC
check valveD
plug cock
考题
单选题If Jack _____ the real situation, he would have made a different plan.A
knowsB
knewC
will knowD
had known
考题
单选题An entry of water，gas，oil，or other formation fluid into the wellbore is called a（）.A
blowoutB
kickC
gusherD
flow
考题
填空题Utterance is based on （）;it is the realization of the abstract meaning of a sentence in a real situation of communication,or simply in a context.
考题
单选题When a teacher creates a real life situation for his students to discuss, he expects them not to focus on__________ too much.A
formB
useC
meaningD
function
热门标签
最新试卷