当前位置:考试网  > 试卷库  > 职业资格  > 其它  > 焊工  > 高级焊工  > 单面焊双面成型焊接技术的操作要领是什么?
试题预览

单面焊双面成型焊接技术的操作要领是什么?

查看答案
收藏
纠错
正确答案:
答案解析:
你可能感兴趣的试题

在进行冲击试验时,试样()摆锤的冲击方向。

不属于碳素钢和低合金钢焊接接头冷裂纹外拘束试验方法的是()。

面罩是防止焊接时的飞溅、弧光及其他辐射对焊工面部及颈部损伤的一种遮蔽工具。

中压容器的设计压力为()。

长期接触噪声可引起噪声性耳聋以及对()的危害。

热门试题 更多>
Passage 3 Questions 11 to 15 are based on the following passage: Unlike their American or European counterparts, car salesmen in Japan work hard to get a buyer. Instead of lying lazily around showrooms waiting for customers to drop by, many Japanese car salesmen still go out to get them. They walk wearily along the streets cars door-to-door. New customers are hunted with fruit and cakes on their birthdays. But life is getting tough, and not just because new-car sales are falling. With more Japanese women (who often control the household budget) going out to work, the salesmen increasingly find nobody at home when they call. That means another visit in the evening or the weekend. Then they face an extra problem: more people, especially the young, prefer to choose a new car from a showroom where they can compare different models. Even as late as the mid-1980s some 90% of new cars were sold door-to-door. In some rural areas most new cars are still sold this way. But in the big cities more than half the new cars are now sold from showrooms. Although investing in showrooms is expensive because of the high cost of Japanese land, dealers have little choice. A labor shortage and higher among Japan’s workforce are making it difficult to hire door-to-door salesmen. Most of a Japanese car salesman’s working day is spent doing favors for customers, like arranging insurance or picking up vehicles for servicing, rather than actually selling. Japan’s doorstep car salesmen are not about to vanish. The personal service they provide is so deep-rooted in Japan that they are likely to operate alongside the glittering new showrooms. The two systems even complement each other. What increasingly happens is that the showroom attracts the interest of a potential buyer, giving the footsore salesmen a firm lead to follow up with a home visit. 11. Japanese car sales usually do not wait at showrooms for customers to drop by; instead, . A. they sell cars door-to-door B. they buy presents for their customers C. they enjoy themselves in recreation centers D. they go out to do market researches 12. Implied but stated: the competition in car market is . A. light B. moderate C. fierce D. unfair 13. Young people like to buy a new car . A. at home B. from a showroom C. made in the U.S.A. D. made in Japan 14. The squadron of Japanese car salesmen is reducing because of . A. a labor shortage B. higher expectations among Japan’s workforce C. high cost land D. both A and B 15. Japanese car salesmen to their customers many favors such as . A. showing them around in an exhibition B. arranging insurance C. paying them a visit on weekends D. selling ole cars for them
试题分类: 大学英语六级
练习次数:0次
Which is safer-staying at home, traveling to work on public transport, or working in the office? Surprisingly, each of these carries the same risk, which is very low. However, what about flying compared to working in the chemical industry? Unfortunately, the former is 65 times riskier than the latter! In fact, the accident rate of workers in the chemical industry is less than that of almost any of human activity, and almost as safe as staying at home. The trouble with the chemical industry is that when things go wrong they often cause death to those living nearby. It is this which makes chemical accidents so newsworthy. Fortunately, they are extremely rare. The most famous ones happened at Texas City (1947),Flixborough (1974), Seveso (1976), Pemex (1984) and Bhopal (1984)。 Some of these are always in the minds of the people even though the loss of life was small. No one died at Seveso, and only 28 workers at Flixborough. The worst accident of all was Bhopal, where up to 3,000 were killed. The Texas City explosion of fertilizer killed 552. The Pemex fire at a storage plant for natural gas in the suburbs of Mexico City took 542 lives, just a month before the unfortunate event at Bhopal. Some experts have discussed these accidents and used each accident to illustrate a particular danger. Thus the Texas City explosion was caused by tons of ammonium nitrate(硝酸铵),which is safe unless stored in great quantity. The Flixborough fireball was the fault of management, which took risks to keep production going during essential repairs. The Seveso accident shows what happens if the local authorities lack knowledge of the danger on their doorstep. When the poisonous gas drifted over the town, local leaders were incapable of taking effective action. The Pemex fire was made worse by an overloaded site in an overcrowded suburb. The fire set off a chain reaction os exploding storage tanks. Yet, by a miracle, the two largest tanks did not explode. Had these caught fire, then 3,000 strong rescue team and fire fighters would all have died. 1.Chemical accidents are usually important enough to be reported as news because ____. A.they are very rare B.they often cause loss of life C.they always occur in big cities D.they arouse the interest of all the readers 2.Which of the following statements is true? A.Working at the office is safer than staying at home. B.Traverlling to work on public transport is safer than working at the office. C.Staying at home is safer than working in the chemical industry. D.Working in the chemical industry is safer than traveling by air. 3.According to passage, the chemical accident that caused by the fault of management happened at ____. A.Texas city B.Flixborough C.Seveso D.Mexico City 4.From the discussion among some experts we may coclude that ____. A.to avoid any accidents we should not repair the facilities in chemical industry B.the local authorities should not be concerned with the production of the chemical industry C.all these accidents could have been avoided or controlled if effective measure had been taken D.natural gas stored in very large tanks is always safe 5.From the passage we know that ammonium nitrate is a kind of ____. A.natural gas, which can easily catch fire B.fertilizer, which can't be stored in a great quantity C.poisonous substance, which can't be used in overcrowded areas D.fuel, which is stored in large tanks
试题分类: 大学英语六级
练习次数:13次
Part II Vocabulary and Structure Directions: In this part there are forty incomplete sentences. Each sentence is followed by four choices. Choose the one that best completes the sentence and then mark your answer on the Answer Sheet. 21. The teacher the students on a tour through the art museum. A. made B. indicated C. forced D. took 22. Tom’s parents died when he was a child, so he was by his relatives. A. grown up B. brought up C. raised D. fed up 23. Here is my card. Let’s keep in . A. touch B. relation C. connection D. friendship 24. So far there is no proof people from other planets do exist. A. which B. how C. what D. that 25. The newspapers reported yesterday several on the boundaries of these two countries. A. incidents B. happenings C. events D. accidents 26. We’ve worked out the plan and now we must put it into . A. fact B. reality C. practice D. deed 27. He didn’t and so he failed the examination. A. work enough hard B. hard work enough C. hard enough work D. work hard enough 28. Not until Mr. Smith came to China what kind of country she is. A. he knew B. he didn’t know C. did he know D. he couldn’t know 29. Scientists say it may be ten years this medicine was put to use. A. since B. before C. after D. when 30. In some countries, is called “equality” does not really mean equal rights for all people. A. that B. what C. which D. how 31. We didn’t know his telephone number, otherwise we him. A. would telephone B. would have telephone C. had telephoned D. must have telephoned 32. We’ve missed the last bus, I’m afraid we have no but to take a taxi. A. way B. possibility C. choice D. selection 33. Luckily, most sheep the flood last month. A. endured B. survived C. lived D. passed 34. My parents always let me have my own of living. A. way B. method C. manner D. fashion 35. Like other language skills, reading requires practice. A. the most of B. much of the C. most of the D. more of the 36. It is only through practice one will be able to swim skillfully. A. what B. who C. that D. which 37. The brain is capable of ignoring pain message of to concentrate on other activities. A. it allowed B. is it allowed C. allowed D. allowed it 38. Don’t worry, I have already them the decision. A. informed; with B. informed; of C. informed; for D. informed; that 39. The child was sorry his mother when he arrived at the station. A. to miss B. having missed C. missing D. to have missed 40. I wonder why he to discuss the problem at the meeting. A. declined B. rejected C. refused D. delayed 41. You can hang up what you like on these walls. A. bare B. empty C. blank D. vacant 42. According to a , the majority would rather have newspapers without a government than a government without newspapers. A. election B. campaign C. poll D. vote 43. The population of the village has decreased 150 to 500. A. in B. at C. by D. with 44. It seems that there is that I can’t do. A. nothing B. anything C. everything D. none 45. They are often caring more about animals than human beings. A. accused if B. accused with C. charged of D. charged for 46. a good beginning is made, the word is half done. A. As soon as B. While C. As D. Once 47. George could not his foolish mistake. A. account in B. count on C. count for D. account for 48. We came into this field late, so we must work hard to the lost time. A. make up for B. make out C. keep up with D. put up with 49. The new law will came into on the day it is passed. A. effect B. use C. service D. existence 50. We can separate the mixture into the pure chemical compounds it is composed. A. in which B. of what C. of which D. from which 51. Mrs. Lincoln has that she is unable to get a job. A. such small education B. so little education C. a such little education D. a so small education 52. She can’t prevent her little boy shooting birds. A. from; to B. on; at C. with; up D. from; at 53. Many countries are increasing their use of natural gas, wind and other forms of . A. energy B. source C. power D. material 54. A darkened sky in the daytime is usually and indication that a storm is . A. possible coming B. about to take place C. close by D. expected to be severe 55. We all know that speak louder than words. A. movements B. performance C. operations D. actions 56. , he could not cover the whole distance in fifteen minutes. A. Fast as he can B. As he can ran fast C. If he can ran fast D. Since he ran fast 57. Agricultural production in that country has increased in recent years. A. vastly B. strikingly C. considerably D. extremely 58. Peter has planned to some money every month so that he can buy a used car next year. A. set aside B. set up C. set in D. set along 59. Although I spoke to him many times, he never took any of what I said. A. attention B. notice C. warning D. observation 60. They overcame all the difficulties and fulfilled the plan three months ahead of time, is something we had not expected. A. that B. what C. it D. which
试题分类: 大学英语六级
练习次数:0次
Passage 2 Questions 6 to 10 are based on the following passage: There are two kinds of memory: shot-term and long-term. Information in long-term memory can be remembered at a later time when it is needed. The information may be kept for days or weeks. However, information over and over. The following experiment shows how short-term memory has been studied. Henning studied how students who are learning English as a second language remember vocabulary. The subjects in his experiment were 75 college students. They represented all levels of ability in English: beginning, intermediate, and native-speaking students. To begin, the subjects listened to a recording of a native speaker reading a paragraph in English. Following the recording, the subjects took a 15-question test to see which words they remembered, each question had four choices. The subjects had to circle the word they had heard in the recording. Some of the questions had four choices that sound alike. For example, weather, whether, wither, and wetter are four words that sound alike. Some of the questions had four choices that have the same meaning. Method, way, manner, and system would be four words with the same meaning. Finally the subjects took a language proficiency test. Henning found that students with a lower proficiency in English made more of their mistakes on words that sound alike; students with a higher proficiency made more of their mistakes on words that have the same meaning. Henning’s results suggest that beginning students hold the sound of words in their short-term memory, and advanced students hold the meaning of words in their short-term memory. 6. Henning made the experiment in order to study . A. how students remember English vocabulary by short-term memory B. how students learn English vocabulary C. how to develop students’ ability in English D. how long information in short-term memory is kept 7. Which of the following statements is TRUE according to the passage? A. Information in short-term memory is different from that in long-term memory. B. Long-term memory can be achieved only by training. C. It is easier to test short-term memory than long-term memory. D. Henning gave a separate test on vocabulary to his students. 8. From Henning’s result we can see that . A. beginners have difficulty distinguishing the pronunciation of words B. advanced students remember words by their meaning C. it is difficult to remember words that sound alike D. it is difficult to remember words that have the same meaning 9. The word “subjects” in the passage means . A. memory B. the theme of listening material C. a branch of knowledge studied D. the students experimented on
试题分类: 大学英语四级
练习次数:0次
试题分类: 安全员
练习次数:0次
Passage 2 Questions 6 to 10 are based on the following passage: In order to learn to be one’s true self, it is necessary to obtain a wide and extensive knowledge of what has been said and done in the world; critically to inquire into it; carefully to consider it; clearly to analyze it; and earnestly to carry it out. It matters not what you learn, but when you once learn a thing, you must never give it up until you have mastered it. It matters not what you inquire into, but when you once inquire into a thing, you must never give it up until you have thoroughly understood it. It matters not what you try to think out, but when you once try to think out a thing, you must never give it up until you have got what you want. It matters not what you try to carry out, but when you once carry out a thing, you must never give it up until you have don’t it thoroughly and well. If another man succeeds by one effort, you will use a hundred efforts. If another man succeeds by ten efforts, you will use a thousand. 6. According to the author, first of all one must . A. analyze B. inquire C. obtain knowledge D. act 7. According to the author, . A. learning is not important B. thinking is not necessary C. knowledge means little D. it is not important what we learn 8. The end of learning should be . A. thought B. mastery C. inquiry D. analysis 9. According to the author, another man’s success should . A. make greater efforts B. make us nervous C. not be taken into consideration D. cause one to stop trying 10. The author implies but does not say what . A. the way to knowledge is through specialization B. one has to know everything to be successful C. success depends not so much on natural ability as it does on effort D. success in one’s profession is latest important in one’s life
试题分类: 大学英语四级
练习次数:16次
扫一扫,手机做题