Тест ИРНИТУ 3 КУРС Materials

Тест по английскому языку для 3 курса ИРНИТУ Materials. В тесте 9 вопросов, все вопросы указаны в оглавлении. Тест сдан в 2024 году на 100%.

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1. Complete the text:

Casting is a 6 ,000 year old process. It is the oldest and most well-known technique based on three fundamental steps: moulding, melting and . First the pattern is made to form the mould. Then an empty mould is created, and finally the empty cavity is filled with molten metal which is then left to solidify into the shape. Casting materials are usually but can also be plastic, resin or various cold materials for example. Casting is usually used for making complex shapes.

2. Complete the text:

Extrusion is a process used to produce objects with a fixed cross-sectional profile. A material is pushed or drawn through a die of the desired cross-section . The two main of this process are its ability to create very complex cross-sections and work materials that are brittle. The extrusion process can be done with hot or cold materials. Commonly extruded materials include

metals, polymers, , concrete and foodstuffs. Ceramic can also be formed into shapes via extrusion . Terracotta extrusion is used to produce pipes. Many modern bricks are also manufactured using a brick extrusion process. Extrusion is also used in processing. Products such as certain pastas, many breakfast cereals, French fries, dry pet food and ready-to- eat snacks are mostly manufactured by extrusion.

3. Complete the text:

Forging is the process by which metal is heated and shaped by a compressive force using a hammer or a press. It is used to produce large quantities of identical parts, such as parts in the automobile industry. Cold forging is done at a low temperature using metals and plastic. Hot forging is done at a high temperature and makes metal easier to shape without breaking. In the past, forging was done by a blacksmith using a hammer. Nowadays industrial forging is done with powered by a machine.

4. Complete the text:

Rolling is a metal forming in which a material (metal, plastic, paper or glass) is passed through a pair of rollers. According to the of material rolled, there is hot rolling or cold rolling.

5. Complete the text:

Sheet metal forming is simply metal formed into thin and flat pieces. The basic forms can be cut and bent into a variety of different shapes. Everyday objects are constructed with this process. There are many different metals that can be made into sheet metal , such as aluminium, , copper, steel, t in, nickel and titanium . For decorative uses, important sheet metals include silver, gold, and platinum. Sheet metal forming is used in car bodies, airplane wings and roofs for .

6. Match the correct processes with the objects:

wires, tubes, rods and bars

pasta, bricks and concrete

sheet, golden leaves

machine parts

7. Match the words with their definitions:

a type of plastic used for insulation

a good insulator but brittle

an alloy formed by mixing iron and carbon

an alloy formed by mixing copper and zinc

a combination of different metals

a metal not suitable as structural material metals containing iron

a composite material used to build houses

8. Put the words in the correct order to make complete sentences.

is done at

room temperature

drawing

9. Listen and complete the definitions:

Iron: Its Latin name is. It is magnetic and has a silvery colour. In prehistoric times it was used to make ornaments and weapons. If exposed to the , it oxidises.

: It is one of the most widely used metals by humans. In prehistoric times it was used to make cooking utensils, and ornamental objects. It is used in and cables.

: It is the most metal and is used to create precious jewellery. It is the most metal.

: It is an formed from iron and. It can contain between 2.1% and 4% carbon. It is also used for utensils and pans.