首页
登录
职称英语
Petroleum products, such as gasoline, kerosene, home heating oil, residual
Petroleum products, such as gasoline, kerosene, home heating oil, residual
游客
2023-11-19
40
管理
问题
Petroleum products, such as gasoline, kerosene, home heating oil, residual fuel oil, and lubricating oils, come from one source - crude oil found below the earth’s surface, as well as under large bodies of water, from a few hundred feet below the surface to as deep as 25,000 feet into the earth’s interior. Sometimes crude oil is secured by drilling a hole through the earth, but more dry holes are drilled than those producing oil. Pressure at the source or pumping forces crude oil to the surface. Crude oil wells flow at varying rates, from ten to thousands of barrels per hour. Petroleum products are always measured 42-gallon barrels.
Petroleum products vary greatly in physical appearance: thin, thick, transparent or opaque, but regardless, their chemical composition is made up of two elements: carbon and hydrogen, which form compounds called hydrocarbons. Other chemical elements found in union with the hydrocarbons are few and are classified as impurities. Trace elements are also found, but these are of such minute quantifies that they are disregarded. The combination of carbon and hydrogen forms many thousands of compounds which are possible because of the various positions and joinings of these two atoms in the hydrocarbon molecule.
The various petroleum products are refined from the crude oil by heating and condensing the vapors. These products are the so-called light oils, such as gasoline, kerosene, and distillate oil. The residue remaining after the light oils are distilled is known as heavy or residual fuel oil and is used mostly for burning under boilers. Additional complicated terming processes rear~ range the chemical structure of the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane rating of various types of gasoline. [br] Which of the following is true?
选项
A、The various petroleum products are produced by filtration.
B、Heating and condensation produce the various products.
C、Chemical separation is used to produce the various products.
D、Mechanical means such as the centrifuge are used to produce the various products.
答案
B
解析
细节题。见第三段第一句话。各种石油产品是通过加热和浓缩原油提炼出来的。
转载请注明原文地址:https://tihaiku.com/zcyy/3199901.html
相关试题推荐
Whatpercentageoftheworld’sknownpetroleumreservesdoesKuwaithave?[br]
Whatpercentageoftheworld’sknownpetroleumreservesdoesKuwaithave?[origi
Hewascaught______intheexamination.A、deceivingB、cheatingC、trickingD、swin
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Allgasesandmostliquidsandsolidsexpandwhen______.A、heatedB、heatingC、b
Inthe1920sdemandforAmericanfarmproductsfell,asEuropeancountries
Cheatingisnothingnew.Buttoday,educatorsandadministratorsarefinding
Cheatingisnothingnew.Buttoday,educatorsandadministratorsarefinding
随机试题
[originaltext]M:Findingcomfortinfood.Eatingtherightdishescanliftour
Honeybeepopulationsdeclinedby13.6%overthewinter,accordingtoasurve
Ifyouvisitabigcityanywhereintheworld,youwillprobablyfindarest
患者男,58岁。用力排便后出现肛门剧痛,无便血。检查见肛管皮下暗紫色肿块,有触痛
小张犯盗窃罪一审法院判决并处罚金5000元,小张提出上诉,二审法院维持一身法院的
在分项总保险金额制方式下,其赔款计算应该使实际赔款控制在()限度内。 A.分
教育行政管理相对人认为教育行政机关的具体行政行为侵犯其合法权益,依法向人民法院起
为了规范和指导保荐机构编制、管理证券发行上市保荐业务工作底稿,中国证监会于()制
()原则是要求自然人、法人和非法人组织在从事民事活动时,不得违反各种法律的强制
在质量控制循环中,当质量状况失控并实施对策后,接续的工作应是( )。A.制定新
最新回复
(
0
)