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Engineering Materials

Engineering Materials
Eutectoid steel contains following percentage of carbon

0.0063
0.0002
0.003
0.008

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Engineering Materials
Process of Austempering results in

Carburised structure
Lamellar layers of carbide distributed throughout the structure
Martenistic structure
Formation of bainite structure

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Engineering Materials
The following element can't impart high strength at elevated temperature

Magnesium
Manganese
Silicon
Nickel

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Magnesium alloys
Chromium alloys
Magnetic steel alloys
Titanium alloys

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Engineering Materials
Balls for ball bearings are made of

Mild steel
Cast iron
Stainless steel
Carbon-chrome steel

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Engineering Materials
Preheating is essential in welding

Cast iron
All of these
High speed steel
All nonferrous materials

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