首页
登录
职称英语
Petroleum products,such as gasoline,kerosine,home heating oil,residual fuel
Petroleum products,such as gasoline,kerosine,home heating oil,residual fuel
游客
2025-04-09
20
管理
问题
Petroleum products,such as gasoline,kerosine,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 bole through the earth,but more dry boles 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 in 42-gallon barrels.
Petroleum products vary greatly in physical appearance:thin,thick,transparent or opaque,but regardless, their chemical composition is made up of only 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 quantities 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 bunting under boilers. Additional complicated refining processes rearrange the chemical structure or the hydrocarbons to produce other products, some of which are used to upgrade and increase the octane(辛烷)rating of various types of gasoline. [br] Crude oil is brought to the surface by means of____.
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
文章第二段“Pressure at the source or pumping forces crude oil to the surface”表明,把原油带到表面的方法是“pressure or pumping。”
转载请注明原文地址:https://tihaiku.com/zcyy/4033616.html
相关试题推荐
Togiveyouageneralideaofourproducts,weenclosethecataloguesshowingva
Althoughhewasnotcaughtcheatingontheexam,thefeelingofguilt______over
Exportofhandicraftproductsisthemainstayofthecounty’seconomy.A、richres
Tomaintainaleadingpositioninthemarket,companieshavetodevelopproducts
Petroleumproducts,suchasgasoline,kerosine,homeheatingoil,residualfuel
Petroleumproducts,suchasgasoline,kerosine,homeheatingoil,residualfuel
Petroleumproducts,suchasgasoline,kerosine,homeheatingoil,residualfuel
Exportofhandicraftproductsisthemainstayofthecounty’seconomy.A、richres
Thebasicstructuralreasonforthisproblemisthatinformationproductsarech
Thestoredisplayeditsmost______productsinthefrontwindow.A、modelB、present
随机试题
[img]2022m3x/ct_ve01202001m_eillist_0540_220329[/img][br][originaltext]Hello
Thequestionofwhatchildrenlearnandhowtheyshouldlearnitiscontinua
Aboutthisnovel,whichofthefollowingstatementisNOTtrue?[br]Wecandraw
Onwhatoccasionsdopeoplemakepositivecommentswhentheydon’treallymeant
Atnotimesmokingpermittedinthemeetingroom,becauseitwilldoharmtobot
有关十二指肠溃疡(DU)的叙述错误的是()。A.DU患者中,2/3有胃酸分泌
某跨径为25m的预应力混凝土简支箱梁桥动力(自振)特性测定试验,试完成以下相关试
简答职业生涯规划的影响因素。
下列对中药升降浮沉属性的理解,正确的是A.有一定规律性 B.有时有特殊性 C
A.磷酸锌粘固粉 B.氢氧化钙 C.复合树脂 D.银汞合金 E.聚羧酸锌
最新回复
(
0
)