首页
登录
职称英语
What can an exhaust system do if it is efficient? [originaltext] Many peopl
What can an exhaust system do if it is efficient? [originaltext] Many peopl
游客
2024-10-01
28
管理
问题
What can an exhaust system do if it is efficient?
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、It can prevent the waste gas from escaping.
B、It can let the waste gas and compound escape quickly out of it.
C、It can prevent the engine from producing waste gas.
D、It can store as much waste gas as possible.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3782103.html
相关试题推荐
Whatcananexhaustsystemdoifitisefficient?[br][originaltext]Many
Whatcananexhaustsystemdoifitisefficient?[br][originaltext]Many
WhathelpedBettymostinlearningSpanish?[br][originaltext]Bettycansp
Accordingtothepassage,anidealmarriagelife______.[br][originaltext]
Whydoesthewomangotoseetheman?[br][originaltext]W:Hi,ProfessorLyon.
Whydoesthewomangotoseetheman?[br][originaltext]W:Hi,ProfessorLyon.
Whydoesthewomangotoseetheman?[originaltext]W:Hi,ProfessorLyon.M:Oh
Thesteadyhumofschoolheatingsystemsandair-conditionerscanmeanlower
Thesteadyhumofschoolheatingsystemsandair-conditionerscanmeanlower
Thesteadyhumofschoolheatingsystemsandair-conditionerscanmeanlower
随机试题
[originaltext]ItishardtoimaginelifewithoutdigitalsearchandtheInte
[originaltext]Todaywecontinueourseriesonecologyandconservationwith
美术课程中怎样有效地实施教学评价
共用题干 李先生在国内购买了一套商铺,现在李先生要出国,他把该商铺委托给某房地
A. B. C. D.
封闭球面,则通过该球面的电通量为:
被称为“均衡组合”的是()。 A.增长型证券组合B.货币市场型证券
投保人变更受益人无需得到被保险人的同意。( )
薪酬管理制度的制订应科学、合理,并与长期稳健可持续发展相适应,一般应包括的内容有
工程项目施工过程中,质量监督机构的职责有()A、核查工程项目报建审批手续是否齐全
最新回复
(
0
)