Hardness of martensite is about

Engineering Materials
Hardness of martensite is about

RC 57

RC 65

RC 80

RC 48

RC 57

RC 65

RC 80

RC 48

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Engineering Materials
The molecules in a solid move

In a random manner

In a haphazard way

In circular motion

Back and forth like tiny pendulums

In a random manner

In a haphazard way

In circular motion

Back and forth like tiny pendulums

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Engineering Materials
Carbon steel is

Extensively used for making cutting tools

Made by adding carbon in steel

An alloy of iron and carbon with varying quantities of phosphorus and sulphur

Refined from cast iron

Extensively used for making cutting tools

Made by adding carbon in steel

An alloy of iron and carbon with varying quantities of phosphorus and sulphur

Refined from cast iron

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Engineering Materials
Malleable 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. It is soft, tough, and easily machined metal

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

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

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

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

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Engineering Materials
Which of the following represents the allotropic forms of iron?

Alpha iron, gamma from and delta iron

Alpha iron, beta iron and gamma iron

Body centered cubic iron and face centered cubic iron

Alpha iron and beta iron

Alpha iron, gamma from and delta iron

Alpha iron, beta iron and gamma iron

Body centered cubic iron and face centered cubic iron

Alpha iron and beta iron

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Engineering Materials
The charge of the blast furnace consists of

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

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

Calcined ore, coke and limestone all in equal parts

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

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

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

Calcined ore, coke and limestone all in equal parts

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

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Engineering Materials

Engineering Materials Hardness of martensite is about

Engineering Materials The molecules in a solid move

Engineering Materials Carbon steel is

Engineering Materials Malleable cast iron

Engineering Materials Which of the following represents the allotropic forms of iron?

Engineering Materials The charge of the blast furnace consists of

Engineering Materials
Hardness of martensite is about

Engineering Materials
The molecules in a solid move

Engineering Materials
Carbon steel is

Engineering Materials
Malleable cast iron

Engineering Materials
Which of the following represents the allotropic forms of iron?

Engineering Materials
The charge of the blast furnace consists of