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Engineering Materials

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

0.005
0.008
0.002
0.01

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Engineering Materials
Sulphur in steel

Reduces the grain size
Lowers the toughness and transverse ductility
Acts as deoxidiser
Decreases tensile strength and hardness

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Engineering Materials
When the steel is normalized, its

Ductility decreases
Ultimate tensile strength increases
Yield point increases
All of these

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Engineering Materials
Brass contains

90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel
70 - 75% copper and rest tin
70% copper and 30% zinc

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Engineering Materials
The elastic stress strain behavior of rubber is

Linear
Nonlinear
No fixed relationship
Plastic

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Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Nitriding
Induction hardening
Cyaniding
Electroplating

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