A material is said to be allotropic, if it has

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

Fixed structure at all temperatures

Atoms distributed in random pattern

Any one of the above

Different crystal structures at different temperatures

Fixed structure at all temperatures

Atoms distributed in random pattern

Any one of the above

Different crystal structures at different temperatures

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Engineering Materials
Malleable cast iron

Is produced by small additions of magnesium (or cerium) in the ladle. Graphite is in the 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 cerium) in the ladle. Graphite is in the 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

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Engineering Materials
High carbon steel carries carbon percentage

0.3 to 0.6%

0.6 to 0.8%

0.8 to 1.5%

0.1 to 0.3%

0.3 to 0.6%

0.6 to 0.8%

0.8 to 1.5%

0.1 to 0.3%

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Engineering Materials
When the steel is normalized, its

Yield point increases

Ductility decreases

Ultimate tensile strength increases

All of these

Yield point increases

Ductility decreases

Ultimate tensile strength increases

All of these

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Engineering Materials
Grey cast iron

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. I is soft, tough and easily machined metal

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

Is also known as chilled cast iron 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. I is soft, tough and easily machined metal

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

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

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Engineering Materials
Which of the following statement is true about brittle fracture?

Brittle fracture is always preceded by noise

High temperature and low strain rates favour brittle fracture

Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

Cup and cone formation is characteristic for brittle materials

Brittle fracture is always preceded by noise

High temperature and low strain rates favour brittle fracture

Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

Cup and cone formation is characteristic for brittle materials

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Engineering Materials

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

Engineering Materials Malleable cast iron

Engineering Materials High carbon steel carries carbon percentage

Engineering Materials When the steel is normalized, its

Engineering Materials Grey cast iron

Engineering Materials Which of the following statement is true about brittle fracture?

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

Engineering Materials
Malleable cast iron

Engineering Materials
High carbon steel carries carbon percentage

Engineering Materials
When the steel is normalized, its

Engineering Materials
Grey cast iron

Engineering Materials
Which of the following statement is true about brittle fracture?