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Engineering Materials

Engineering Materials
Drop forging dies contain carbon of the order of

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

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Engineering Materials
Cementite consist of

13% carbon and 87% ferrite
13% ferrite and 87% cementite
6.67% carbon and 93.33% iron
13% cementite and 87% ferrite

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Engineering Materials
Muntz metal contains copper and zinc in the ratio of

2.1180555555556
40 : 60
0.88888888888889
2.5277777777778

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

Heat resisting steel
High speed steel
Invar
Stainless steel

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Engineering Materials
Which of the following metal shrinks most from molten state to solid state?

Brass
Cast iron
Cast steel
Admiralty metal

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

Cementite
Flakes
Spheroids
Free carbon

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