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
67
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
Onceuponafreeapoorfarmertakingasackofwheattothemilldidnotkn
美国历史上,记者招待会形成制度始于哪一位美国总统A.林肯 B.威尔逊 C.华
闭合性脑损伤
以下有关审计目标的说法中正确的有( )。A、审计目标包括财务报表审计目标以及与各
2008年我国全年建设占用耕地19.16万公顷,灾毁耕地2.48万公顷。生态退耕
根据《自然资源部办公厅关于加强国土空间规划监督管理的通知》,下列说法不正确的是(
(2020年真题)20×9年3月8日,甲公司董事会通过将其自用的一栋办公楼用于出
A公司为增值税一般纳税人,适用的增值税税率为13%。本月购进甲原材料100吨,货
具有良好的低温性能,可作为低温材料,常温下具有极好的抗蚀性能,在大气、海水、硝酸
质量管理中,运用排列图法可以()。A.划分调查分析的类别和层次 B.描述
最新回复
(
0
)