Test Ne Teknologji Klasa E VII

Bakeliti është material i parë plastik, i përbërë nga fenoli dhe formaldehidi.

When thermoplastic materials are subjected to thermal processing, they do not change their molecular structure. This means that the arrangement of the molecules remains the same even after the material has been melted and cooled. The other options are incorrect because they either state that the structure does change (which is not true) or that the first two options are slow (which is not mentioned in the question).

The correct answer is "Procesi i prodhimit përmes prodhimit të eksdrudimit" because the photo shows a process of polymer production through extrusion.

This answer suggests that the photo depicts the production of sheets using the extrusion blowing method.

The given answer states that polystyrene is used as a packaging material, particularly for food and electronic products. This is correct because polystyrene is commonly used in the packaging industry due to its lightweight, insulating, and protective properties. The answer also mentions that the first discoveries of semi-synthetic materials were made in 1860, which is accurate as the development of semi-synthetic materials began around that time. Lastly, the answer states that celluloid has the disadvantage of being highly flammable and burning quickly, which is true as celluloid is a highly flammable material.

The correct answer is "Nafta dhe derivatet e saj, Kriprat dhe acidet". This answer is correct because it includes the primary raw materials used in the production of plastic materials. Nafta dhe derivatet e saj (crude oil and its derivatives) are the main source of the raw materials used in the production of plastics. Kriprat dhe acidet (salts and acids) are also used in various stages of plastic production, such as polymerization and chemical reactions. Therefore, both options are essential in the production of plastic materials.

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