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Engineering Materials

Engineering Materials
Steel containing ferrite and pearlite is

Hard and tough
Hard
Tough
Soft

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Engineering Materials
A cold chisel is made of

H.S.S.
Cast iron
Mild steel
High carbon

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Engineering Materials
The hardness of steel primarily depends on

Heat treatment employed
Percentage of carbon
Shape of carbides and their distribution in iron
Percentage of alloying elements

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Engineering Materials
When the steel is normalized, its

Yield point increases
Ductility decreases
All of these
Ultimate tensile strength increases

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Engineering Materials
High carbon steel carries carbon percentage

0.3 to 0.6%
0.1 to 0.3%
0.6 to 0.8%
0.8 to 1.5%

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Engineering Materials
Gamma iron exits at following temperature

Between 910°C and 1400°C
Between 1400°C and 1539°C
Room temperature
Near melting point

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