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Engineering Materials

Engineering Materials
Nodular cast iron is produced by adding ________ to the molten cast iron.

Chromium
Copper
Magnesium
Nickel

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

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

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Engineering Materials
Gamma-iron occurs between the temperature ranges of

400°C to 600°C
1400°C to 1530°C
600°C to 900°C
900°C to 1400°C

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Engineering Materials
Manganese in steel increases its

Tensile strength
Fluidity
Ductility
Hardness

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Engineering Materials
Tungsten in high speed steel provides

Wear resistance
Hot hardness
Toughness
Sharp cutting edge

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Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 65
RC 48
RC 80
RC 57

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