типа unit 9

Which type of steel contains predominantly iron?

• Alloy steel

• Stainless steel

• Plain-carbon steel

• High carbon steel

What is the main advantage of low carbon steels?

• High hardness

• Good corrosion resistance

• Ductility and toughness

• High strength

Which type of stainless steel is suitable for interior architectural and decorative household appliances?

• Austenitic stainless steel

• Ferritic stainless steel

• Precipitation-hardening stainless steel

• Martensitic stainless steel

What is the main advantage of using aluminum alloys?

• High thermal conductivity

• High strength-to-weight ratio

• Good corrosion resistance

• High ductility

Which type of aluminum alloy is used for marine structure and furniture?

• Al-Mn alloys

• Al-Cu-Mg alloys

• Al-Mg alloys

• Al-Mg-Si alloys

What is the main advantage of magnesium alloys?

• High thermal conductivity

• High ductility

• High strength-to-weight ratio

• Good corrosion resistance

Which industry primarily uses titanium alloys for structural members in aircraft?

• Biomedical

• Chemical engineering

• Automotive

• Aerospace

What is the main advantage of titanium alloys in biomedical applications?

• High electrical conductivity

• High ductility

• Outstanding resistance to corrosion by body fluids

• High thermal conductivity

What are the two main categories of plastics?

• Alloys and Composites

• Metal Matrix and Fiber-reinforced

• Crystalline and Amorphous

• Thermoplastics and Thermosets

Which material is known for its high chemical resistance and good fatigue and wear properties?

• Polyester (PETP, PBTP)

• Acetal (POM)

• Polyethylene (PE)

• Poly(methyl methacrylate) (PMMA)