首页
登录
职称英语
[originaltext] To extinguish different kinds of fires, several types of fire
[originaltext] To extinguish different kinds of fires, several types of fire
游客
2024-03-05
38
管理
问题
To extinguish different kinds of fires, several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers.
Since fuel, oxygen and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get.
Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used to cover a small fire.
A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel.
The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.
选项
A、Separating the fire.
B、Reducing the heat.
C、Removing the fuel
D、Cutting off the oxygen.
答案
D
解析
Which method is often used if we cover a small piece Of burning wood with a basin in order to stop the fire?
转载请注明原文地址:https://tihaiku.com/zcyy/3507214.html
相关试题推荐
[originaltext]Theworld’sfirstgunmadewith3Dprintertechnologyhasbee
[originaltext]Theworld’sfirstgunmadewith3Dprintertechnologyhasbee
[originaltext]Theworld’sfirstgunmadewith3Dprintertechnologyhasbee
[originaltext]EversinceStarbuckshadthebusinesswisdomtomakeWiFiits
[originaltext]W:Goodeveningandwelcometoourprogram.Today,we’lltalkabo
[originaltext]W:Goodeveningandwelcometoourprogram.Today,we’lltalkabo
[originaltext]W:Goodeveningandwelcometoourprogram.Today,we’lltalkabo
[originaltext]Fromfieldstudiestolaboratorystudies,weseethatwinning
[originaltext]Fromfieldstudiestolaboratorystudies,weseethatwinning
[originaltext]Shynessisthecauseofmuchunhappinessforagreatmanypeo
随机试题
We’llwatcha(n)______telecastofafootballmatchtonight.A、livelyB、activeC
Inrecentyearsmanycountriesoftheworldhavebeenfacedwiththeproblem
Awell-meaningladygaveRobertawrong______andhefinishedatthetheatrein
______allthestudentshaveincommonis______theyworkveryhard.A、what;thatB
B
患儿,3个月前因结核病曾住院治疗。近3天来患儿易激惹,哭闹不止,频繁呕吐.嗜睡;
甲房地产开发公司(以下简称甲公司)开发了一个住宅小区。为促进住宅销售,甲公司制作
A.不能催吐 B.禁止洗胃 C.不能导泻 D.不能用强利尿剂 E.血液透
骨折病人长期卧床可发生( )。A.脂肪栓塞 B.创伤性关节炎 C.损伤性骨
某县安全生产监管局接到群众举报,反映一家烟花爆竹批发销售企业销售非法生产的烟花爆
最新回复
(
0
)