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Engineering Materials

Engineering Materials
Induction hardening is basically a

None of these
Surface hardening process
Carburising process
Core hardening process

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Engineering Materials
In nodular iron, graphite is in the form of

Flakes
Cementite
Spheroids
Free carbon

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

910°C
Below recrystallization temperature
1050°C
770°C

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Engineering Materials
The elastic stress strain behavior of rubber is

Nonlinear
Plastic
Linear
No fixed relationship

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Engineering Materials
Which is false statement about annealing? Annealing is done to

Relieve stresses
Harden steel slightly
Soften material
Improve machining characteristic

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Engineering Materials
Cementite consist of

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

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