White cast iron | EXAMIANS

Engineering Materials
White cast iron

Is produced by annealing process. It is soft, tough and easily machined metal

Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

Is produced by annealing process. It is soft, tough and easily machined metal

Is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material

Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.45 to 0.55%

0.55 to 1.0%

0.05 to 0.20%

0.20 to 0.45%

0.45 to 0.55%

0.55 to 1.0%

0.05 to 0.20%

0.20 to 0.45%

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Engineering Materials
Induction hardening is basically a

Surface hardening process

Carburising process

Core hardening process

None of these

Surface hardening process

Carburising process

Core hardening process

None of these

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Engineering Materials
Pearlite consists of

6.67% carbon and 93.33% iron

13% ferrite and 87% cementite

13% carbon and 87% ferrite

13% cementite and 87% ferrite

6.67% carbon and 93.33% iron

13% ferrite and 87% cementite

13% carbon and 87% ferrite

13% cementite and 87% ferrite

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Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

30° C to 50° C above upper critical temperature

30° C to 50° C below lower critical temperature

30° C to 50° C below upper critical temperature

30° C to 50° C above lower critical temperature

30° C to 50° C above upper critical temperature

30° C to 50° C below lower critical temperature

30° C to 50° C below upper critical temperature

30° C to 50° C above lower critical temperature

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Engineering Materials
A material is known as allotropic or polymorphic if it

Exists in several crystal forms at different temperatures

Responds to heat treatment

Has its atoms distributed in a random pattern

Has a fixed structure under all conditions

Exists in several crystal forms at different temperatures

Responds to heat treatment

Has its atoms distributed in a random pattern

Has a fixed structure under all conditions

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Engineering Materials

Engineering Materials White cast iron

Engineering Materials Large forgings, crank shafts, axles normally contain carbon up to

Engineering Materials Induction hardening is basically a

Engineering Materials Pearlite consists of

Engineering Materials The temperature required for full annealing in hypereutectoid steel is

Engineering Materials A material is known as allotropic or polymorphic if it

Engineering Materials
White cast iron

Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

Engineering Materials
Induction hardening is basically a

Engineering Materials
Pearlite consists of

Engineering Materials
The temperature required for full annealing in hypereutectoid steel is

Engineering Materials
A material is known as allotropic or polymorphic if it