Steel contains | EXAMIANS

Engineering Materials
Steel contains

80% or more iron

50% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

Alloying elements like chromium, tungsten nickel and copper

80% or more iron

50% or more iron

Elements like phosphorus, sulphur and silicon in varying quantities

Alloying elements like chromium, tungsten nickel and copper

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Engineering Materials
The unit cells

May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice

All of these

Have the same orientation and their similar faces are parallel

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal

May be defined as the smallest parallelepiped which could be transposed in three coordinate directions to build up the space lattice

All of these

Have the same orientation and their similar faces are parallel

Contain the smallest number of atoms which when taken together have all the properties of the crystals of the particular metal

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Engineering Materials
The compressive strength of cast iron is __________that of its tensile strength.

Equal to

More than

Less than

None of these

Equal to

More than

Less than

None of these

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Engineering Materials
Ductile 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

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

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

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

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

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
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

None of these

Less than

More than

Equal to

None of these

Less than

More than

Equal to

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Engineering Materials
Grey cast iron has

Low compressive strength

Carbon in the form of free graphite

High tensile strength

All of these

Low compressive strength

Carbon in the form of free graphite

High tensile strength

All of these

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Engineering Materials

Engineering Materials Steel contains

Engineering Materials The unit cells

Engineering Materials The compressive strength of cast iron is __________that of its tensile strength.

Engineering Materials Ductile cast iron

Engineering Materials Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Engineering Materials Grey cast iron has

Engineering Materials
Steel contains

Engineering Materials
The unit cells

Engineering Materials
The compressive strength of cast iron is __________that of its tensile strength.

Engineering Materials
Ductile cast iron

Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Engineering Materials
Grey cast iron has