首页
登录
职称英语
What can an exhaust system do if it is efficient? [br] [originaltext] Many
What can an exhaust system do if it is efficient? [br] [originaltext] Many
游客
2024-10-01
23
管理
问题
What can an exhaust system do if it is efficient? [br]
Many people tend to disregard the exhaust system of an automobile. They may think that the exhaust system does nothing more than to discharge the waste products of the combustion process. Although this is exactly what the exhaust system does, the way these waste product is discharged out of the engine is essential to the performance of the engine. A gasoline engine involves three processes: combustion, mechanical drive and exhaust. If one of these processes is impeded, the condition of the engine will depreciate. The exhaust system has three major functions, the first of which is to channel out the waste products of combustion out of the engine to allow it to continue to burn fuel unhindered thereby ensuring that the engine runs smoothly. An efficient exhaust system allows the waste gas and compound to escape quickly out of the system. If these waste products do not escape from the engine immediately, they may choke up the engine thus causing it to break down. Another function of the exhaust system is to reduce the noise generated by the engine. The third function of the exhaust system is to clean up the emissions that are harmful to the environment. When the engine burns fuel, it produces gases that pollute the air such as hydrocarbons, carbon monoxide and nitrogen oxides.
选项
A、Oxygen.
B、Hydrocarbons.
C、Carbon monoxide.
D、Nitrogen oxides.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3782105.html
相关试题推荐
Whichofthefollowingmaybestserveasthetitle?[br][originaltext]Ind
Whichofthefollowingmaybestserveasthetitle?[originaltext]Indonesia
Whatcananexhaustsystemdoifitisefficient?[br][originaltext]Many
Whatcananexhaustsystemdoifitisefficient?[originaltext]Manypeopl
WhathelpedBettymostinlearningSpanish?[originaltext]BettycanspeakSp
Accordingtothepassage,anidealmarriagelife______.[br][originaltext]
Accordingtothepassage,anidealmarriagelife______.[br][originaltext]
Whydoesthewomangotoseetheman?[originaltext]W:Hi,ProfessorLyon.M:Oh
StevewantstotraveltoLondonbytraininsteadofbusbecause[originaltext]W:
Thesteadyhumofschoolheatingsystemsandair-conditionerscanmeanlower
随机试题
Completethesequence.[img]2012q2/ct_eyyjscz2008a_eyyjsciq_0509_20122[/img]Q
Apublic-serviceadvertisementadvisesthatpeoplewhohaveconsumedalcoholsho
Cultureisthetotalsumofallthetraditions,customs,beliefs,andwayso
Recognizingwhenafriendorcolleaguef
直线路段遮光角的计算与防眩板的间距和防眩板的宽度有关。
用止血带止血时,不正确的是:A.止血带不可过细或过窄 B.记录扎止血带的时间
目前“2000国家GPS控制网”的组成不包括()A.国家测绘局布设的GPSA
B被积分式中含有根式时,常用第二类换元法,令即,则dx=tdt,且x=0时t=1,x=4时t=3,从而有
“假说”在没有事实验证的情况下还不是科学理论。现有的科学知识和理论远不是事实的全
水电厂控制台立面上的设备布置,上下边净距不小于(),左右倒不应小于()。 A.
最新回复
(
0
)