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
2025-01-14
11
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、In the air.
B、On the airfield.
C、Under water.
D、At the plane manufacturing factory.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912671.html
相关试题推荐
[originaltext]W:Well,goodmorning,Jack.Ihaven’tseenyouforalongtime.
[originaltext]Insomeways,childrenshouldbetreatedasmaturepeople.Fo
[originaltext]Insomeways,childrenshouldbetreatedasmaturepeople.Fo
[originaltext]W:Hello,Jimmy,nicetomeetyou!M:Hi,Sandy,canIhaveawor
[originaltext]Ourpricesarelowerthanthoseofanyofourcompetitorsby5%t
[originaltext]Ourpricesarelowerthanthoseofanyofourcompetitorsby5%t
[originaltext]AsfarasIknow,theBeachsideHotelisoneofthefavoritehote
[originaltext]AsfarasIknow,theBeachsideHotelisoneofthefavoritehote
[originaltext]AsfarasIknow,theBeachsideHotelisoneofthefavoritehote
[originaltext]IfyouarebornintoanAmericanfamilyrankinginthetop10of
随机试题
Untilrecently,theUniversityofKentprideditselfonitsfriendlyimage.
Computerpeopletalkalotabouttheneedforotherpeopletobecome"compu
Theworldhasspentonpreparationforwarmorethan$112billionayear,r
[originaltext]M:Next.Uh,yourpassport,please.W:Okay.M:Uh,what’sthepu
在其他条件不变的情况下,变动订货成本和变动储存成本随着订货量增加而增加。
营养不良的主要临床表现是()A.食欲减退 B.精神委靡 C.面色苍白
A.1.5 B.1.7 C.1.9 D.2.1
男性,60岁,间歇上腹部痛4年,1个月前出现进食后饱胀、嗳气、不反酸,胃纳差,体
下列关于股票发行方式的说法中,不正确的是( )。A.股票的发行方式,以发行对象为
(2018年真题)用于隧洞喷锚支护的锚杆,其安设方向一般应垂直于( )。 A
最新回复
(
0
)