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Engineering Materials

Engineering Materials
The transistor is made of

Gold
Silver
Germanium
Copper

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

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

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Engineering Materials
Iron is

Ferromagnetic
Dielectric
Ferroelectric
Paramagnetic

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The grain size increases very rapidly
The grain size first increases and then decreases very rapidly
There is no change in grain size
The average grain size is a minimum

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Engineering Materials
Delta iron occurs at temperature of

Between 1400°C and 1539°C
Between 910°C and 1400°C
Above melting point
Room temperature

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

Flakes
Free carbon
Spheroids
Cementite

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MORE MCQ ON Engineering Materials

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