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[主观题]

丁烷（C4H10)：（）

A、相对密度比空气大1倍，lNm3正丁烷重2.458kg。The relative density is 1 times that of air, and lNm3 n-butane weighs 2.458kg

B、经常以液体形式从天然气中提取出来，通常被当作动力汽油的掺合剂使用。It is often extracted in liquid form from natural gas and is often used as an admixture for power gasoline

C、在常温常压下, C1～C4为气体, C5+为液体At normal temperature and pressure, C1 ~ C4 is a gas and C5+ is a liquid

D、以上都不对

提问人：网友frlzaj 发布时间：2022-01-07

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更多“丁烷（C4H10)：（）”相关的问题

第1题

硫化氢(H2S)：（）

A、是硫化物中的主要组成部分，极臭且有毒的可燃气体。Is the main component of sulfide, extremely smelly and toxic flammable gas.

B、硫化氢是天然气中的一种酸气。Hydrogen sulfide is an acid gas in natural gas.

C、在硫化氢含量为0.06％的环境中，如果人停留2min以上时，将可能导致死亡。因此，须从原料气脱除。At 0.06 percent hydrogen sulfide, people can die if they stay for more than 2 minutes. Therefore, the raw gas must be removed.

D、以上都不是

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第2题

丙烷(C3H8)：（）

A、无色气体Colorless gas

B、比空气重，lNm3丙烷重1.966kg。Heavier than air, lNm3 propane weighs 1.966kg.

C、20℃及0.85MPa以上时呈液态。Liquid state at 20℃ and above 0.85MPa.

D、丙烷的热值介于86403～93889kJ/m3。The caloric value of propane is between 86,403 and 93889kJ/m3.

E、天然气中含量一般在0.005%~4%之间。Natural gas generally contains between 0.005% and 4%.

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第3题

按天然气的烃类组成分类Classification by hydrocarbon composition of natural gas 即按天然气中液烃含量的多少来分类，可分为（）。According to the amount of liquid hydrocarbon content in natural gas classification, can be divided into dry gas, moisture or poor gas, rich gas.

A、干气

B、湿气

C、贫气

D、富气

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第4题

二氧化碳(CO2)：（）

A、是一种酸气，无色，具有微弱的气味。It is also an acid gas, colorless, with a faint odor.

B、通常只要对热值无太大影响时可不脱除CO2。Usually CO2 can not be removed as long as there is no significant effect on calorific value.

C、CO2与水在一定条件下形成水合物，并对井下以及集输设备产生腐蚀作用。CO2 and water form hydrate under certain conditions, and produce corrosion effect on underground and gathering and transportation equipment.

D、CO2用于注气驱油时可以提高采收率。CO2 can improve recovery when used for gas flooding.

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第5题

天然气广义指自然界的一切气体，狭义则指采自地层的可燃气体。 Natural gas refers to all natural gases in a broad sense, while in a narrow sense, it refers to combustible gas extracted from stratum.

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第6题

天然气是一种气体混合物，要了解它的性质，必须知道各组分性质间的关系。混合物的组成可用（）或它们的百分数来表示。Natural gas is a mixture of gases. To understand its properties, it is necessary to know the relationship between the properties of each component. The composition of mixtures may be expressed by volume fraction, mole fraction, mass fraction, or percentage of them.

A、容积分数

B、摩尔分数

C、重量分数

D、质量分数

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第7题

氦(He)：（）

A、属稀有惰性气体，无色，无味，微溶于水，不燃烧，也不能助燃。It is a rare inert gas, colorless, tasteless, slightly soluble in water, and does not burn or aid combustion.

B、氦是除氢气以外密度最小的气体，其密度是氢气的1.98倍，与空气的相对密为l/7.2。Helium is the least dense gas except hydrogen, with a density of 1.98 times that of hydrogen and a relative density of l/7.2 of air.

C、是贵重的稀有气体，天然气中含量甚微，不超过1％(体积比)。天然气中如果氦含量超过0.1％(体积比)时，就有提氦的工业价值。It is a valuable and rare gas, found in very small amounts, less than 1% by volume. When helium content exceeds 0.1% (volume ratio), it has an industrial value.

D、以上都不是

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第8题

石油工业中称采自气田或凝析气田的可燃气体为天然气，又称气田气；在油田中与石油一起开采出来的可燃气体称为石油伴生气或油田伴生气。 In petroleum industry, the combustible gas extracted from gas field or condensate field is called natural gas, also called gas field gas. The combustible gas produced together with oil in oil field is called petroleum associated gas or oil field associated gas.

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第9题

天然气特点：密度小、粘度低，无色。可燃气体，与5％-15％的空气混合易燃，热值高。 Characteristics of natural gas: low density, low viscosity, colorless. Flammable gas, mixed with 5% - 15% air, high calorific value.

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