Ответы » Английский язык (18796 вопросов)

Вопрос № 800614 - Английский язык

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Mixing small wires with enlarged ends into concrete increases the material’s strength and hardness, according to research performed at the National laboratory, Los Alamos, New Mexico.
Researchers found that when bone-shaped wires 25 mm long were added in amounts equal to just 1 percent of the concrete’s volume, the strength increased by as much as 84 percent. The concrete was also 93 times harder.
Straight steel wires have been used to reinforce concrete for several decades. But wires of this kind bond only weakly with the concrete at their ends. Besides, it turned out that straight wires can also snap under high stress without much bending or stretching. In stress tests concrete containing the wires with bulbous ends became even stronger after the first cracks appeared as the load was transferred to the wires.
Закончите предложение
Straight steel wires have been used _______.
Варианты ответов
  • to reinforce concrete for several decades.
  • at the National laboratory, Los Alamos, New Mexico.
  • under high stress without much bending or stretching.
  • in stress tests.
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 01:37
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 01:37

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Вопрос № 150661

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Prestressed concrete is a relatively young product. It started to be widely used only during the last few decades, and is still gaining popularity. The reason of its popularity is its usefulness. The main good qualities of prestressed concrete are its high strength and durability. In prestressed concrete, concrete is combined with steel. This combination is highly advantageous. It serves the purpose of producing a compressed stress in the concrete as a building material. For this reason any member of beam is under constant compression and as a result has no cracks. In modern times this type of concrete serves as construction material for beams, for pipes, and columns, storage tanks, water towers and the like.
Закончите предложение:
The reason of popularity of prestressed concrete is …
high strength and durability
the purpose of producing a compressed stress in the concrete as a building material
a relatively young product
its usefulness

Вопрос № 348187

Заполните пропуски в инструкции следующими фразами
Srip1_______.
2 _______ of the wires with a wire stripper.
Before soldering, the wires must be marked and 3 _______ must be put on the wires.
The wires must be soldered to the 4_______.
the outer insulation.
Strip the ends
the insulation sleeves
correct ends.

Другие вопросы по предмету Английский язык

Вопрос № 800615

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The plant where high-density polyethylene pipe is being manufactured needed repairs to its pipe storage area. The repairs became necessary because the stone layer did not shed water and it caused cracks. The cracking of storage pavement area made it necessary to stabilize the site.
So it became necessary for engineers to look for a way that would be economical and would not require shutting down the operating area of the plant. After testing a number of alternatives, it was decided to use polypropylene fibres for the purpose. It was found out that when being mixed with soil the fibres produce the necessary stability. The way the engineers proposed turned out to be economical and quite successful.
Закончите предложение
It was found out that _______.
the stone layer did not shed water and it caused cracks.
the plant needed repairs to its pipe storage area.
the cracking of storage pavement area made it necessary to stabilize the site.
when being mixed with soil the fibres produce the necessary stability.

Вопрос № 800616

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The new concrete pipe being manufactured may be classified as the benchmark of industry. Among other excellent qualities, it possesses the highest structural strength compared with any sanitary sewer.
What are the main characteristics of the pipe that make it so popular? These are advanced concrete mix design, and steel reinforcement. High quality manufacture processes allow the pipe to be used in any site conditions, from shallow fills to deep bury situations. Strength, concrete’s pipe’s durability and its versatility are the main properties that are combined in the pipe. They produce the technology one can trust.
Закончите предложение
Strength, concrete’s pipe’s durability and its versatility _______.
may be classified as the benchmark of industry.
possess the highest structural strength .
allow the pipe to be used in any site conditions.
are the main properties that are combined in the pipe.

Вопрос № 800617

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Nowadays suspended ceilings have become a very popular and economical feature in many types of buildings. The most numerous among these buildings are office and laboratory structures. Many of them install and maintain complex mechanical and electrical installations above the ceiling. These installations include air conditioning ducts, water and waste piping and electrical and communications wiring. They also include such services as fume ducting, vacuum piping, fuel gas lines, compressed air lines, water piping, and chemical waste piping. All these ducts and pipes occupy a considerable space in the building. In some of them they may be equal to the amount of their living space.  
Закончите предложение
All these ducts and pipes _______.
are office and laboratory structures.
are very numerous.
have become a very popular and economical feature in many types of buildings.
occupy a considerable space in the building.

Вопрос № 800618

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There are different shapes in the picture. They are triangles, squares, rectangles and circles.
Triangles have three angles. Squares and rectangles have four sides. Squares have four equal sides, but rectangles have two equal sides. Circles do not have angles or sides.
Закончите предложение
Squares and rectangles have _______.
four equal sides.
two equal sides.
no angles nor sides.
four sides.
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