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
37
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] How is crude oil brought to the surface?
选项
A、Expansion of the hydrocarbons.
B、Pressure and pumping.
C、Vacuum created in the drilling pipe.
D、Expansion and contraction of the earth’s surface.
答案
B
解析
细节题。见第一段倒数第二句话“Pressure at the source or pumping forces crude oil to the surface.”即源头压力和水泵将原油压出表面。
转载请注明原文地址:https://tihaiku.com/zcyy/3199902.html
相关试题推荐
Whatpercentageoftheworld’sknownpetroleumreservesdoesKuwaithave?[origi
BIRD-Xofferspestbirdcontrolproductsto______,controlandgetridofbirds
[audioFiles]audio_ezfm_0025(20103)[/audioFiles]Therearemanyproductsand
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Fromthismaterialwecan______hundredsofwhatyoumaycalldirectproducts.A
Allgasesandmostliquidsandsolidsexpandwhen______.A、heatedB、heatingC、b
Inthe1920sdemandforAmericanfarmproductsfell,asEuropeancountries
Inthe1920sdemandforAmericanfarmproductsfell,asEuropeancountries
Cheatingisnothingnew.Buttoday,educatorsandadministratorsarefinding
随机试题
A、Shedressesmoreformallythanmostpeople.B、Sheistheonlywomanwhoiswea
【B1】[br]【B8】A、valueB、ratioC、rateD、speedD根据上下文,应该是提高了速度,与前面faster来呼应。
HowInterpretersWork?Ⅰ.UnderstandingA.Aboutwordsand
Banksnormallyreceivemoneyfromtheircustomersintwodistinctforms:on
下述不属于抗皮肤寄生虫感染药物禁忌证的是()A:相应药物过敏者禁用 B:有癫痫
关于先天性梅毒,青霉素的用法是A.每次5万U/kg,im,q12h,共7天;后改
商业银行查询个人信用报告时应当取得被查询人的()。A.书面授权 B.本人
对于不同类型的客户信息的保管期限,基金管理部门有着不同的规定,客户交易记录自交易
集合资产管理计划应当面向合格投资者推广,合格投资者累计不得超过()人。A.50
【背景资料】 A安装公司承包某大楼的空调设备的智能监控系统安装工程。主要监控设
最新回复
(
0
)