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Engineering Materials

Engineering Materials
The steel widely used for motor car crankshafts is

Chrome steel
Silicon steel
Nickel steel
Nickel-chrome steel

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The average grain size is a minimum
The grain size increases very rapidly
There is no change in grain size
The grain size first increases and then decreases very rapidly

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Engineering Materials
Hematite iron ore contains iron about

0.45
0.3
0.55
0.7

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Engineering Materials
Corrosion resistance of steel is increased by adding

Nickel and molybdenum
Chromium and nickel
Aluminium and zinc
Tungsten and sulphur

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Engineering Materials
The alloying element which reduces the formation of iron sulphide in steel is

Nickel
Chromium
Manganese
Vanadium

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Engineering Materials
Which of the following is the binding material in cemented carbides?

Iron
Cobalt
Vanadium
Nickel

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