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
2023-08-22
65
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
转载请注明原文地址:https://tihaiku.com/zcyy/2948291.html
相关试题推荐
[originaltext]Yourassignmentsthistermwillbetowritetwomajorresearc
[originaltext]Yourassignmentsthistermwillbetowritetwomajorresearc
[originaltext]Yourassignmentsthistermwillbetowritetwomajorresearc
[originaltext]Mostsingle-parentfamiliesresultwhenamarriageendsindi
[originaltext]Mostsingle-parentfamiliesresultwhenamarriageendsindi
[originaltext]W:Dr.Anderson,couldyoupleaseclarifytherequirementsforth
[originaltext]W:Dr.Anderson,couldyoupleaseclarifytherequirementsforth
[originaltext]W:Dr.Anderson,couldyoupleaseclarifytherequirementsforth
[originaltext]M:I’vejustbroughtyourladderback,Mrs.Fielding.Thanksfor
[originaltext]M:I’vejustbroughtyourladderback,Mrs.Fielding.Thanksfor
随机试题
FirstBankofEnglandAddress:48NorthSquare,LondonWSSR5KL,UKTel:
VisitorstoBritainmayfindthebestplacetosamplelocalcultureisina
Youngadults________olderpeoplearemorelikelytopreferonlineshopping.A、rat
城市公共自行车是城市轨道交通和地面常规公交的重要补充和延伸,是为市民提供绿色出行
以下针对审计证据的说法中,正确的是()。A.环境证据通常需要作为主要证据
共用题干 EbolaOutbreak1.Youarelikelyaw
下列哪些因素参与体液平衡的调节? A.肾B.肺 C.肾素-血管紧张素-醛固
根据《物权法》和《担保法》的规定,债务人可以用于抵押担保的财产有( )。A.国有
在安排公路进度计划中使用时间为横轴,以累计完成的工程量的百分数为纵轴的图形是(
在进行建设工程项目总进度目标控制前,首先应分析和论证()。A.目标实现的可能性
最新回复
(
0
)