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
49
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.(22)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.(23)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.(24) This doesn’t cause so much damage in side the water tank as it would anywhere else. Engineers can discover which part of the plane cracked. This part is made stronger.
(24)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.(25)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、To find out how much air can be pumped into a plane.
B、To find out how much air passengers need to breathe at certain altitudes.
C、To find what would happen if the plane crashed in the water.
D、To find out if there are any weak parts in the plane that would burst under pressure.
答案
D
解析
细节题。文章谈到了减压水舱试验(tank test)是为了帮助工程师发现飞机的裂缝,以防飞机在飞行过程中由于压力过大而爆炸。
转载请注明原文地址:https://tihaiku.com/zcyy/2947069.html
相关试题推荐
Before1965manyscientistspicturedthecirculationoftheocean’swaterma
Before1965manyscientistspicturedthecirculationoftheocean’swaterma
Before1965manyscientistspicturedthecirculationoftheocean’swaterma
[originaltext]AmericanvisitorstoEasternAsiaareoftensurprisedandpuz
[originaltext]InBritainthebiggestnumberofworkingforeignerscomesfro
[originaltext]Thefamilyischanging.Inthepast,grandparents,parents,a
[originaltext]Thefamilyischanging.Inthepast,grandparents,parents,a
[originaltext]Thefamilyischanging.Inthepast,grandparents,parents,a
[originaltext]Thefamilyischanging.Inthepast,grandparents,parents,a
[originaltext]M:I’msotired,Ican’tseestraight.W:You’vebeentiredalot
随机试题
AttheKyotoconferenceonglobalwarminginDecember1997,itbecameabunda
AmazinglyfortheBritish,wholovequeues,thereisnoformalline-up—theb
(1)Martinheavedasighofreliefwhenthedoorclosedbehindthelaundryma
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroug
衡量国有资产管理目标实现程度的重要手段是()。A.国有资产运营管理 B.国
一次小组活动中,组员小张突然质疑组员小刘,认为他在小组中过于表现自己,让其他组员
某男,34岁。体瘦弱患十二指肠溃疡2年。深秋时节,突遭寒风来袭引发脘腹疼痛,并伴
根据FIDIC《施工合同条件》,承包商未能在规定时间内修复缺陷工程部位,业主可雇
一儿童因食用大量存放过久的蔬菜,而引起的以青紫症为主的食物中毒,及时采用1%美蓝
病人自觉大脑突然涌现出大量不自主的、杂乱无章的、不属于自己思想的陌生内容,此症状
最新回复
(
0
)