When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

More than

Less than

Equal to

None of these

More than

Less than

Equal to

None 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 also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

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

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 is obtained by cooling rapidly. It is almost unmachinable

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

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Engineering Materials
Tensile strength of steel can be safely increased by

Adding carbon up to 0.83%

Adding carbon up to 6.3%

Adding carbon up to 2.8%

Adding small quantities of copper

Adding carbon up to 0.83%

Adding carbon up to 6.3%

Adding carbon up to 2.8%

Adding small quantities of copper

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Engineering Materials
The aluminium alloy, mainly used, for anodized utensil manufacture, is

Y-alloy

Magnalium

Hindalium

Duralumin

Y-alloy

Magnalium

Hindalium

Duralumin

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Engineering Materials
Hematite iron ore contains iron about

0.45

0.55

0.7

0.3

0.45

0.55

0.7

0.3

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Engineering Materials
Aluminium bronze contains

92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

90% magnesium and 9% aluminium with some copper

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

10% aluminium and 90% copper

92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg

90% magnesium and 9% aluminium with some copper

94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

10% aluminium and 90% copper

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Engineering Materials

Engineering Materials When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Engineering Materials Grey cast iron

Engineering Materials Tensile strength of steel can be safely increased by

Engineering Materials The aluminium alloy, mainly used, for anodized utensil manufacture, is

Engineering Materials Hematite iron ore contains iron about

Engineering Materials Aluminium bronze contains

Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Engineering Materials
Grey cast iron

Engineering Materials
Tensile strength of steel can be safely increased by

Engineering Materials
The aluminium alloy, mainly used, for anodized utensil manufacture, is

Engineering Materials
Hematite iron ore contains iron about

Engineering Materials
Aluminium bronze contains