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Engineering Materials

Engineering Materials
An engineer's hammer is made of

Cast iron
Mild steel
Forged steel
High carbon steel

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Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

1500°C to 1700°C
400° to 700°C
1200°C to 1300°C
800°C to 1000°C

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Engineering Materials
Chromium when added to steel _________ the tensile strength.

Increases
Decreases
Does not effect
None of these

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Engineering Materials
Which is the false statement about wrought iron? It has

High resistance to rusting and corrosion
Uniform strength in all directions
High ductility
Ability of hold protective coating

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Melting point
Yield point
Critical temperature
Hardness

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Engineering Materials
Gun metal contains

90% copper and 10% tin
70% copper and 30% zinc
70 - 78% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel

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