Materials and Their Engineering Properties

Which of the following is a characteristic of stainless steel?

• High electrical conductivity

• Corrosion resistance

• Low thermal stability

• High acoustic absorption

What is the primary difference between thermoplastic and thermosetting plastics?

• Thermoplastics can be remoulded, thermosetting plastics cannot

• Thermosetting plastics are magnetic, thermoplastics are not

• Thermoplastics are more rigid than thermosetting plastics

• Thermosetting plastics have higher electrical conductivity

Which of the following materials is non-ferrous?

• Cast iron

• Low carbon steel

• Aluminium

• High carbon steel

What is the purpose of annealing in heat treatment?

• To increase hardness

• To improve ductility

• To decrease electrical conductivity

• To increase magnetic properties

Which type of corrosion involves the loss of metal ions from the surface?

• Pitting

• Intergranular

• Galvanic

• Leaching

Which reinforcing material is known for its high strength-to-weight ratio?

• Glass fibre

• Carbon fibre

• Aramid fibre

• Copper

What is the main advantage of using composites in engineering applications?

• High density

• Low cost

• High strength and low weight

• High thermal conductivity

Which of the following is a method to identify ferrous metals?

• Colour test

• Spark test

• Density test

• Acoustic test

What is the main characteristic of low alloy steels?

• High carbon content

• High corrosion resistance

• Enhanced mechanical properties

• High electrical conductivity

Which of the following is a non-metallic material?

• Brass

• Bronze

• Hard wood

• Nickel