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Вопрос № 223848 - Английский язык

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Concrete is the name of artificial stone. The materials from which concrete is formed are sand, pieces of broken stone and cement mixed with water in suitable proportions. These materials are called ingredients of concrete. The sand and broken stone form the skeleton of concrete. Dry cement is an inert powder, but on the addition of water a chemical reaction takes place.
This causes the whole mix to set and harden forming a solid mix.
Water used in concrete mix is ordinary drinking water. It must be free from any impurities. The amount of water added influences the properties of concrete. Concrete products must be manufactured according with existing standards. Having chosen component materials builders must be well familiar with technology of concrete and use them in correct proportions.
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Which materials form the skeleton of concrete?
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  • The sand and broken stone form the skeleton of concrete.
  • Water and broken stone form the skeleton of concrete.
  • The sand and water form the skeleton of concrete.
  • Cement and water form the skeleton of concrete.
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Вопрос задал(а): Анонимный пользователь, 10 Ноябрь 2020 в 00:17
На вопрос ответил(а): Анастасия Степанова, 10 Ноябрь 2020 в 00:17

Похожие вопросы

Вопрос № 848134

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Concrete is the name of artificial stone. The materials from which concrete is formed are sand, pieces of broken stone and cement mixed with water in suitable proportions. These materials are called ingredients of concrete. The sand and broken stone form the skeleton of concrete. Dry cement is an inert powder, but on the addition of water a chemical reaction takes place.
This causes the whole mix to set and harden forming a solid mix.
Water used in concrete mix is ordinary drinking water. It must be free from any impurities. The amount of water added influences the properties of concrete. Concrete products must be manufactured according with existing standards. Having chosen component materials builders must be well familiar with technology of concrete and use them in correct proportions.
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Which materials form the skeleton of concrete?
Pieces of broken stone and cement mixed with water form the skeleton of concrete.
The sand and water form the skeleton of concrete.
Cement and water form the skeleton of concrete.
The sand and broken stone form the skeleton of concrete.

Вопрос № 223826

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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?
The quality of concrete depends on raw materials used.
The quality of concrete depends on the process of production.
The quality of concrete depends on the quality of sand used.
The quality of concrete depends on the quality of cement used.

Другие вопросы по предмету Английский язык

Вопрос № 223849

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One of the centres of the American automobile industry is Detroit. It is located in the southeast of Michigan, on the Detroit River, connecting Lakes Erie and St. Clair, right opposite Windsor, in Canada. It was founded in 1701 by a French trader Antoine de la Monte Cadillac, who built a fort on the river. Later, thanks to Henry Ford, Detroit became the leading centre of the automobile industry. Today about 34.000 cars are produced here every day.
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Whom was Detroit founded by?
It was founded by Henry Ford.
It was founded by a French military engineer Cugnot.
It was founded by the black population.
It was founded by a French trader Antoine de la Monte Cadillac.

Вопрос № 223850

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Charles Makintosh was a chemist by profession. He worked in textile industry and in 1823 he developed a rubber solution used for raincoat production. Raincoats with this rubber solution didn’t allow water to penetrate. These raincoats were called makintoshes and people use them in rainy weather.
растворение
микстура
решение
раствор

Вопрос № 223852

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The power may come, for example, from an animal as in the case of a horse-drawn cart, from wind as for the sailing ship and windmill. Here the man is fully responsible for controlling the system but he requires devices such as switches, pedals and steering wheels to control the power system.
власть
способность
степень
сила

Вопрос № 223853

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The single-process machine or a tool with built-in auto-control can perform any process whenever it is fed with raw materials by the operator. It has its own source of power. An example is the automatic lathe in the use early in the 20th century.
верховье
ключ
начало
источник
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