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Engineering Materials

Engineering Materials
In malleable iron, carbon is present in the form of

Nodular aggregates of graphite
Cementite
Free carbon
Flakes

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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

Remain same
Decrease
First increase and then decrease
Increase

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Engineering Materials
Drop forging dies contain carbon of the order of

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

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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?

Manganese
Phosphorus
Sulphur
Silicon

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Engineering Materials
Nickel when added to copper improves

Machinability
Strength and ductility
Hardness
Hardness and strength

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Engineering Materials
The machinability of steel is improved by adding

Chromium
Nickel
Sulphur, lead and phosphorus
Nickel and chromium

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MORE MCQ ON Engineering Materials

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