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Engineering Materials

Engineering Materials
Maximum percentage of carbon in austenite is

0.017
0.008
0.0026
0.00025

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Engineering Materials
Silicon when added to copper improves

Machinability
Hardness and strength
Hardness
Strength and ductility

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Engineering Materials
Which of the following represents the allotropic forms of iron?

Alpha iron and beta iron
Body centered cubic iron and face centered cubic iron
Alpha iron, gamma from and delta iron
Alpha iron, beta iron and gamma iron

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Engineering Materials
Corundum contains more than 95%

SiO2
MgO
Al2O3
Steel

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Engineering Materials
Which is false statement about normalizing? Normalizing is done to

Improve mechanical properties
Reduce segregation in casting
Induce stresses
Refine grain structure

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

None of these
Does not effect
Lowers
Raises

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