Science Steel

What are alloys in the context of steel composition?

• Mixtures of iron with carbon

• Pure forms of iron

• Chemical compounds of iron

• Elements found in the earth's crust

What is the maximum percentage of carbon in low carbon steel?

• 0.25%

• 0.5%

• 1.5%

• 2%

Which of the following is not a type of cast iron?

• Gray cast iron

• Ductile cast iron

• Malleable cast iron

• High-carbon steel

What is essential when selecting engineering materials for a specific application or environment?

• Considering the cost only

• The color and design of the materials

• The range of properties of the materials

• The brand of the materials

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What can the incorrect selection of engineering materials lead to?

• Decreased production time

• Lower costs and increased efficiency

• Complete failure of the finished component

• Improved material performance

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What element is primarily contained in ferrous metals?

• Copper

• Aluminum

• Iron

• Zinc

Why is pure iron considered unsuitable for modern engineering products?

• It is too heavy

• It is too expensive

• It is relatively weak

• It is too brittle

What is added to iron to produce steel?

• Nickel

• Carbon

• Silicon

• Magnesium

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Which material is described as the most widely used engineering material?

• Aluminum

• Copper

• Steel

• Plastic

What is steel primarily composed of?

• Iron and nickel

• Iron and carbon

• Iron and silicon

• Iron and magnesium

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