ENGINEERING MATERIALS QUIZ

Percentage of alloying elements

Percentage of carbon

Heat treatment employed

Shape of carbides and their distribution in iron

Harden steel slightly

Soften material

Improve machining characteristic

Relieve stresses

Hard and gives a fine grained crystalline structure

Soft and gives a fine grained crystalline structure

Hard and gives a coarse grained crystalline structure

Soft and gives a coarse grained crystalline structure

Ultimate tensile strength increases

Ductility decreases

All of these

Yield point increases

All of these

Working at lower temperature

Purification of metal

Grain refinement

70 - 75% copper and rest tin

90% copper and 10% tin

70% copper and 30% zinc

85 - 92% copper and rest tin with little lead and nickel

Chrome steel

Nickel-chrome steel

Silicon steel

Nickel steel

Nickel, Copper and zinc

Refined silver

Silver and some impurities

Nickel and copper

Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

Calcined ore, coke and limestone all in equal parts

Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

High speed steel

All of these

All nonferrous materials

Cast iron