White cast iron | EXAMIANS

Engineering Materials
White cast iron

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

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

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

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

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

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

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Engineering Materials
Stress relaxation is the phenomenon

In which parts are not loaded

Stress reduces on increasing load

In which deformation tends to loosen the joint and produces a stress reduced

In which stress remains constant on increasing load

In which parts are not loaded

Stress reduces on increasing load

In which deformation tends to loosen the joint and produces a stress reduced

In which stress remains constant on increasing load

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Engineering Materials
In compression, a prism of brittle material will break

In direction perpendicular to application of load

By shearing along oblique plane

By crushing into thousands of pieces

By forming a bulge

In direction perpendicular to application of load

By shearing along oblique plane

By crushing into thousands of pieces

By forming a bulge

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Engineering Materials
A material is said to be allotropic, if it has

Atoms distributed in random pattern

Fixed structure at all temperatures

Any one of the above

Different crystal structures at different temperatures

Atoms distributed in random pattern

Fixed structure at all temperatures

Any one of the above

Different crystal structures at different temperatures

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Engineering Materials
The machinability of steel is increased by

Phosphorous, lead and sulphur

Silicon and sulphur

Sulphur, graphite and aluminium

Phosphorous and aluminium

Phosphorous, lead and sulphur

Silicon and sulphur

Sulphur, graphite and aluminium

Phosphorous and aluminium

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Engineering Materials
The purpose of heat treatment is to

Relieve the stresses set up in the material after hot or cold working

Change grain size

Any one of these

Modify the structure of the material

Relieve the stresses set up in the material after hot or cold working

Change grain size

Any one of these

Modify the structure of the material

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Engineering Materials

Engineering Materials White cast iron

Engineering Materials Stress relaxation is the phenomenon

Engineering Materials In compression, a prism of brittle material will break

Engineering Materials A material is said to be allotropic, if it has

Engineering Materials The machinability of steel is increased by

Engineering Materials The purpose of heat treatment is to

Engineering Materials
White cast iron

Engineering Materials
Stress relaxation is the phenomenon

Engineering Materials
In compression, a prism of brittle material will break

Engineering Materials
A material is said to be allotropic, if it has

Engineering Materials
The machinability of steel is increased by

Engineering Materials
The purpose of heat treatment is to