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
37
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、Two important tests of a new airliner before it is put into use.
B、How to carry out tank test in the water.
C、How pilots carry out the test flight.
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/3912672.html
相关试题推荐
[originaltext]W:RecentlyartistSamuelCliffandwriterDanArchertookourre
[originaltext]Moreoftenthannot,I’vebeenaskedbymystudentsthisques
[originaltext]Moreoftenthannot,I’vebeenaskedbymystudentsthisques
[originaltext]Moreoftenthannot,I’vebeenaskedbymystudentsthisques
[originaltext]W:George,asauniversitystudent,you’vebeenhereforalmosta
[originaltext]W:George,asauniversitystudent,you’vebeenhereforalmosta
[originaltext]W:George,asauniversitystudent,you’vebeenhereforalmosta
[originaltext]Willyouenjoyacupoforangejuiceeverymorning?Myadvice
[originaltext]Willyouenjoyacupoforangejuiceeverymorning?Myadvice
[originaltext]Willyouenjoyacupoforangejuiceeverymorning?Myadvice
随机试题
[originaltext]M:Hi,Jenny,whyareyoustilleatingwhileyouareusingtheco
机电产品国际招标项目的投标保证金可以是下列()形式。A.银行保函 B.信用证
2018年第四季度,中国人力资源市场信息监测中心对89个城市的公共就业服务机构市
根据期限对民事法律行为效力所起的作用,可以分为( )。A.始期 B.中期
下列关于平均数的说法,正确的有()。
下列教学方法中以实际训练为主的方法是( )。A.讨论法 B.读书指导法
甲房地产估价机构接受张某的委托,评估其一套购买于2010年8月1日的住宅的转让价
物业服务企业在写字楼管理中,保证非收益部分的合理用主要体现在()。A:办公室空间
若未扣除通货膨胀影响的资金成本(贷款利率)为6%,通货膨胀率为2%,所得税税率为
男性,45岁,间断腹痛、腹泻3年,排便4~5次/天,便不成形,无脓血,黏液,服小
最新回复
(
0
)