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Engineering Materials

Engineering Materials
An eutectoid steel consists of

Wholly austenite
Pearlite and ferrite
Wholly pearlite
Pearlite and cementite

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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
Heavy duty leaf and coil springs contain carbon of the following order

0.01
0.005
0.002
0.008

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Engineering Materials
Addition of copper to aluminium results in

Improving machinability
Improvement of corrosion resistance
One of the best known age and precipitation hardening systems
Improvement of casting characteristics

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Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 48
RC 57
RC 80
RC 65

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Engineering Materials
Manganese is added in low carbon steel to

All of these
Make the steel tougher and harder
Make the steel ductile and of good bending qualities
Raise the yield point

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MORE MCQ ON Engineering Materials

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