首页
登录
职称英语
[originaltext] Before a new airliner goes into service, every part of it is
[originaltext] Before a new airliner goes into service, every part of it is
游客
2023-12-23
23
管理
问题
Before a new airliner goes into service, every part of it is tested again and again. But there are two tests that are more important than all the others. One of them is very strange and the other is very dangerous.
The first of these is called the "tank test". A modern airliner must fly at very high altitudes. Air must be pumped into the plane so that the passengers can breathe. The metal structure of the plane has to be very strong for this reason. When the plane is filled with air, the air presses against the skin of the plane. The pressure on a small window, for example, is like a huge, giant foot that is trying to get out. if a small part of the plane were to crack, the plane would explode in the sky. This is what happened to the first Comets. In order to test the structure of the plane, it is lowered onto a huge tank of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is in the air. Finally, there’s an explosion. This doesn’t cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane cracked. This part is made stronger.
The most dangerous test happens when the new plane goes through test flights in the air. The test pilot must find out exactly what happens when the engines are shut off suddenly. He takes the plane up very high. Then he shuts the engines off. The plane begins to fall like a stone. It is the pilot’s job to find out how he can get control of the plane again. These two tests are examples of how planes are made safe before they ever carry passengers.
Q. 23. What’s the purpose of the tank test?
Q. 24.Why is the tank test carried out under water?
Q. 25.Where is the second part test carried out?
Q. 26.What does this speaker mainly talk about?
选项
A、To find out how much air can be pumped into a plane.
B、To find out how much air passengers need to breathe at certain altitudes.
C、To find what would happen if the plane crashed in the water.
D、To find out if there are any weak parts in the plane that would burst under pressure.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298109.html
相关试题推荐
[originaltext]Therearetimeswhenpeoplearesotiredthattheyfallasleepal
[originaltext]Themosteffectivepeoplearethesamewhethertheyarchavinga
[originaltext]Themosteffectivepeoplearethesamewhethertheyarchavinga
[originaltext]Themosteffectivepeoplearethesamewhethertheyarchavinga
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]You’veprobablyheardtheslogan"savethewhales".Doyoukn
[originaltext]W:ProfessorPierson,couldyougiveusabriefintroductionoft
[originaltext]WeallfindthatlearningEnglishtakeseffortanddedication
随机试题
[img]2012q1/ct_etoefm_etoeflistz_0931_20121[/img][br]Howarethedifferentsub
【说明】假设你是销售部经理,写信询问对方产品信息和价格。【内容】1.在电视上看到对方的产品广告,对男女自行车及童车感兴趣;2.希望对方寄来一份产品目录和价
Contrarytopopularbelief,olderpeoplegenerallydonotwanttolivewith
地震前自然界出现的与地震孕育有关的现象称为地震前兆。我国古代人民早就认识到地震是
门窗工程的施工质量控制点:()。A.门窗洞口预留尺寸 B.基层处理 C.合
快速排序算法是,在排序过程中,在待排序数组中确定一个元素为基准元素,根据基准元素
1970年以后世界卫生组织把高脂蛋白血症分为A.2型B.3型C.5型D.6型E.
变压器过负荷运行时,不宜进行调压操作;过负荷()倍时,禁止调压操作。1.
简述岗位胜任特征的概念和内涵。
小张是某工程设计公司从资深工程师团队中选拔上来的一位主管。他原来是公司的技术骨干
最新回复
(
0
)