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7. Define the forms and functions of the Infinitives and translate the sentences into Ukrainian.

  1. Some metals are known to be deformed under compression.

  2. Students seem to know this rule.

  3. We consider metals to be valuable in mechanics.

  4. Strength is considered to be the property of hard materials.

  5. Engineers proposed rupture machines to test metals.

  6. Hardness is known to be a property to resist deformation under applied load.

  7. The students are expected to take into account different properties of metals.

  8. Malleability of a metal is also known as its ability to be deformed permanently under compression without rupture.

  9. To determine properties of a metal special machines are used.

  10. The materials to be tested are clamped between two clamps on the rupture machine.

  11. It is common practice to divide metallurgical materials into ferrous and non-ferrous ones.

  12. The ability of a material to take deformation without breaking is known as plasticity.

8. Fill in the gaps with the prepositions to, within, from, into, on, in, of, by means of, per, without, by:

  1. The composition … metals and alloys is important … the effect it has … their mechanical, electrical, or magnetic properties.

  2. Metals can be cast … various shapes weighing … a few ounces … many tons.

  3. Their plasticity or ability to deform … rupture allows their formation … a required shape.

  4. The strength … a metal is generally measured … tensile tests.

  5. Tensile strength is expressed … pounds … square inch.

  6. When a metal is subjected … stresses exceeding its elastic limit, the crystals of the metal elongate by an action … shearing which takes place … the crystal and between the crystals.

  7. One way … measuring the hardness is to determine the depth … which a diamond cone or ball will penetrate … the metal under a given load.

9. Put all possible questions to the sentences:

    1. Copper is used for making electrical contacts and wires because of its high electrical conductivity.

    2. Aluminium possesses high corrosion-resistant qualities.

    3. Non-ferrous castings differ greatly from ferrous ones.

    4. Aluminium is extensively used for castings that are to be light in weight.

10. Translate the sentences into English

  1. Пластичність – це здатність матеріалу змінювати свою форму.

  2. Метали піддаються впливу зовнішніх сил.

  3. Ми можемо визначити механічні властивості металів.

  4. Навантаження на зразок можна визначити в будь-який момент.

  5. Всі матеріали еластичні.

Discussion

1. Are the following statements about the text true or false? Why?

  1. While using engineering materials it is not necessary to know their physical characteristics.

  2. Materials can change their shape because of external loads.

  3. By testing a metal under a load it is possible to define what mechanical properties it has.

  4. The determination of properties is made in the university using a specimen of the metal to be tested.

  5. Strength is the property of hard materials to be subjected to the influence of external forces incurring damage and changing their shape.

  6. Elasticity is the ability of a material to change its shape under the influence of external loads and return to its original form upon removal of the loads.

  7. Some materials are elastic.

  8. Plasticity is that property of a material when under the influence of loads, specimens of different materials may elongate while their cross-section decreases.

  9. Hardness is the property to withstand deformation under applied load.

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