MATERIALS TECHNOLOGY

What are the three types of engineering materials

• Composites, wood, and plastic

• Metal, Plastic and solids

• Solids, liquids and gases

• Metals, ceramics and polymers

Three important properties of solid materials

• Electrical, ductility and strength

• Mechanical, magnetic and electrical

• Thermal, Deteriorative, and plasticity

• Magnetic, colour and sound

What is the main constituent of the ferrous materials?

• Fermium

• Iron

• Aluminium

• Nickel

The maximum content of carbon in steel is

• 4%

• 1%

• 3%

• 2%

The maximum content of carbon in cast irons is

• 6%

• 4%

• 5%

• 2%

The major ingredient of stainless steel

• Copper

• Chromium

• Zinc

• Aluminium

The four classes of stainless steels are:

• Carbon steel

  Plain steel

  Alloy steel

  Mild steel

• Tool steel

  High speed steel

  Low speed steel

  Hardened steel

• High strength

  Medium strength

  Low strength

  Soft steel

• Martensitiic

  Ferritic

  Austenitic

  Precipitation

Classify polymer materials

• Thermoplastics

  Thermosets

  Elastomers

• Rubber

  Plastic

  Polyethylene

• Amorphous

  Crystalline

  Thermosets

• Polyethylene

  Polyisoprene

  Thermoplastics

Brass is an alloy of

• Boron and steel

• Beryllium and copper

• Copper and Zinc

• Aluminium and copper

Bronze is an alloy of

• Copper and Zinc

• Copper and Nickel

• Boron and Copper

• Copper and Tin