Прочитайте текст. When can water penetrate a wall Three conditions are necessary. Firstly there must...: ответ на тест 1104931 - Английский язык

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When can water penetrate a wall? Three conditions are necessary. Firstly, there must be water present at the outer face of the wall. Secondly, there must be a crack or a hole in the wall through which the water can move. And thirdly, there must be a force that will move the water through this opening. If any of these conditions is absent, water will not penetrate a wall.
In what way can one keep water away from the walls of a building? One can eliminate all the openings from the wall in order to make a wall watertight.
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One can eliminate all the openings from the wall in order …

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Cladding is a material used as the exterior wall enclosure of a building. The cladding of a building is its most visible part. Its major purpose is to separate the indoor environment of a building from the outdoors. Cladding must prevent the entry of water, snow and ice into a building. Water on the face of a building is known to be driven by wind not only in a downward direction, but in every other direction, even upward. Water problems, that is keeping water out, are especially great on very tall buildings. These buildings rise to height where wind velocities are extremely high. They are much higher than at ground level. It should be taken into account that on tall buildings water tends to penetrate the smallest crack or hole and enter the building.

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The fundamental purpose of a door is to provide access into or out of a building. Doors also serve for providing access into or out of various compartments of a building. Doors also have the following functions. They provide security, weather resistance, fire-resistance, thermal insulation, sound insulation. As to exterior doors, they must be well-designed and properly constructed. They must not leak air, wind, heat and water.
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The fundamental purpose of a door is …

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Orientation and construction of buildings should receive special attention in places where environmental and climatic factors have a significant effect. Structural design, style and materials should be compatible with local climatic and weather conditions. For example, flat roofs should be avoided in areas with frequent rainfalls. Snow and wind are variable loads that should be taken into account while designing a structure and its roof. Tall buildings are not recommended in places where strong winds, humidity or fog are likely and bring damage.
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Structural design, style and materials should be compatible with …

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What is steel as a construction material? Steel may be classified as iron with the controlled amount of carbon. The amount of carbon in steel is generally less than 1.7 per cent. Ordinary structural steel should contain less than three tenth of one per cent carbon. This kind of steel also contains small amounts of phosphorus, sulfur, oxygen, nitrogen and silicon. Like iron and its alloys, steel belongs to ferrous metals. It is hard substance. Accordingly, it can be pulled, forged and melted. Generally, steel, this strong metal, like other metals, is a good conductor of electricity. Alloyed steel and stainless steel are corrosion-resistant kinds of steel.
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Steel belongs to …

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The plastics that were unknown only a few decades ago have become extremely important and widely used for construction purposes. The plastics being used nowadays possess many advantages. First of all they are extremely light and their tensile strength is greater than that of many metals. Besides, they are weather-resistant and resistant to a great number of chemical substances. Some of the examples of the constructive use of plastic materials have been domes housing radar antennae and electronic equipment. Such domes built in America and Canada are as high as 116 feet.
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The tensile strength of plastics is …