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Engineering Materials

Engineering Materials
Iron ore is usually found in the form of

Oxides
Carbonates
All of these
Sulphides

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.45 to 0.55%
0.05 to 0.20%
0.20 to 0.45%
0.55 to 1.0%

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Engineering Materials
Which of the following impurity in cast iron makes it hard and brittle?

Phosphorus
Sulphur
Silicon
Manganese

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Engineering Materials
When elements like nickel, chromium, copper and molybdenum are added to the molten cast iron, it produces

Alloy cast iron
White cast iron
Nodular cast iron
Malleable cast iron

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Engineering Materials
Cupola produces following material

Cast iron
Malleable iron
Wrought iron
Pig iron

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Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Cyaniding
Nitriding
Induction hardening
Electroplating

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