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
2023-08-26
68
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 into 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 is 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 shut 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.
Questions 22 to 25 are based on the passage you have just heard.
22. What is the purpose of the tank test?
23. Why is the tank test carried under water?
24. Where is the second test carried out?
25. What does this speaker mainly talk about?
选项
A、Two important tests of a new airliner because it is put into use.
B、How to carry out tank test in the water.
C、How pilots carry out the test flights.
D、How to make a safe passenger plane.
答案
A
解析
推理题。文章主要讲述了飞机在正式使用前进行的两次试验。
转载请注明原文地址:https://tihaiku.com/zcyy/2958070.html
相关试题推荐
[originaltext]Diet,diet,diet!Itgetstobeaconstantbattleformanyof
[originaltext]Diet,diet,diet!Itgetstobeaconstantbattleformanyof
[originaltext]Diet,diet,diet!Itgetstobeaconstantbattleformanyof
[originaltext]Wehumanshavefoundcountlessmysteriesoftheuniversewith
[originaltext]W:Goodmorning,Peter.M:Goodmorning,Julia.W:Docomein.Yo
[originaltext]W:Goodmorning,Peter.M:Goodmorning,Julia.W:Docomein.Yo
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihaven
[originaltext]W:Hi,Scott,haveyouheardaboutDianarecently?M:No,Ihaven
[originaltext]M:I’vejustbeenovertomyfriendTom’snewapartment.It’smuc
[originaltext]M:I’vejustbeenovertomyfriendTom’snewapartment.It’smuc
随机试题
Onceuponatimeapoorfarmertakingasackofwheattothemilldidnotkn
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandno
[originaltext]Whatdoyouliketodoinyoursparetime?[/originaltext][origin
女,27岁,右侧甲状腺瘤在颈浅丛麻醉下行甲状腺瘤摘除术,术后饮食时间应为:A、术
背景材料: 某施工单位承建了二级公路施工项目,设计车速60km/h,路基宽度1
工厂的两个车间共同组装6300辆自行车。如果先由一号车间组装8天,再由二号车间组
(2018年11月)负责考评的人员到实际工作地点调查工作完成的情况,对工作地点有
( )是企业组织内部依据具体分工,在同一级机构、职能业务人员之间的信息传递。A
某建筑工程公司为甲市增值税一般纳税人,2021年6月到乙市提供建筑服务(建
某项目预计投产后第5年的息税前利润为180万元,应还借款本金为40万元,应付利息
最新回复
(
0
)