Вопрос № 800582 - Английский язык

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Concrete is produced by combining coarse and fine aggregates, Portland cement, and water. Coarse aggregate is generally gravel or crushed stone, and fine aggregate is sand. Cement, sand, gravel and water are taken in proportional amounts and mixed. The quality of concrete depends mostly on the quality of the cement used. The process of production consists in pouring the mixed components into forms and holding them there until they harden. The process of hardening generally lasts for about 28 days.

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Concrete is produced by combining coarse and fine aggregates, Portland cement, and water. Coarse aggregate is generally gravel or crushed stone, and fine aggregate is sand. Cement, sand, gravel and water are taken in proportional amounts and mixed. The quality of concrete depends mostly on the quality of the cement used. The process of production consists in pouring the mixed components into forms and holding them there until they harden. The process of hardening generally lasts for about 28 days.
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What does the quality of concrete depend on?

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There exist different ways of producing concrete. It can be produced by mixing the ingredients and pouring the mixture into position on the very site of building. Concrete can also be produced in a factory, and used as a material for manufacturing prefabricated blocks. Accordingly, there exist the so-called in-situ (cast-in-place) concrete and precast concrete.

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The Tay Bridge in Scotland was designed and built by Sir Thomas Bouch. 1_______. The bridge, which was over 3 kilometres long, opened in 1878 and fell down in a winter storm in 1879. 2_______.
There was the enquiry into the Tay Bridge disaster to find out why the accident happened. One of the constructions was that the design and construction were based on quickly and cheaply it could be built. Safety and strength were not thought about properly. 3___________ . Also, the design was based on experience rather than the more scientific and accurate calculations used today. 4___________. The results confirm that the design of the bridge was definitely substandard.

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Engineering is everywhere. 1________. For example, if a manufacturer wants a faster car, a smaller personal stereo, or a better pen, they will ask a design engineer to find a practical solution.
Engineering is both theoretical and practical. 2________. The design solution must be a reasonable price, safe, and reliable. A new idea that is expensive, dangerous, or doesn’t always work is not a good solution.
Engineers use a method. Generally, engineers solve problems in a methodical way.
Engineers:
1. 3________,
2. design a solution,
3. rest the solution,
4. evaluate the solution.
4________. When a good solution is found, the next step is to:
     5. communicate the solution.

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There are lots of different types of engineering. 1_______. The whole science of engineering can be broadly divided into three main areas:
- civil engineering (buildings, roads, etc.)
- 2_______
- electrical engineering (electricity, lighting, etc.)
Each of these three main area can be divided into specialist subjects.
Civil engineering covers mining and bridge building, mechanical engineering covers aeronautical and automobile engineering, electrical engineering covers electricity generation and wiring.
Clearly there is a big difference between building a road and designing a computer system so the best advice for students is:
think carefully about which area of engineering interests you most. It is difficult to study if you are not interested – and you may do the job until you are 60 years old.
think about what sort of person you are. Will you be happiest working in an office, in a factory, or alone? 3_______ Do you want to work with other people or alone? 4_______. When you have decided which area you are interested in and thought realistically about what sort of person you are, then you can decide what sort of engineer you want to be.