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Engineering Materials

Engineering Materials
In nodular iron, graphite is in the form of

Cementite
Spheroids
Flakes
Free carbon

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Engineering Materials
Drop forging dies contain carbon of the order of

0.1 to 0.2%
0.6 to 0.7%
0.25 to 0.5%
0.7 to 0.9%

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Engineering Materials
A cold chisel is made of

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

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Engineering Materials
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

Silicon
Sulphur
Manganese
Phosphorus

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

Copper
Chromium
Nickel
Magnesium

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Engineering Materials
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will

Increase
Decrease
First increase and then decrease
Remain same

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