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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

5 to 7%
0.5 to 1%
0.012
2.5 to 4.5%

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Engineering Materials
The machinability of steel is increased by

Silicon and sulphur
Phosphorous and aluminium
Phosphorous, lead and sulphur
Sulphur, graphite and aluminium

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Engineering Materials
The cupola is used to manufacture

Pig iron
Steel
Cast iron
Wrought iron

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

Electroplating
Cyaniding
Nitriding
Induction hardening

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Engineering Materials
Depth of hardness of steel is increased by addition of

Tungsten
Nickel
Vanadium
Chromium

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Engineering Materials
Sulphur in steel

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

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