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Engineering Materials

Engineering Materials
Super conduction by metals is observed in the temperature range of

Around 100°C
Around 0°C
Below 10°K
Above 100°K

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Engineering Materials
Basic constituents of Monel metal are

Zinc, tin, lead
Nickel, molybdenum
Nickel, lead and tin
Nickel, copper

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Engineering Materials
Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

Manganese
Phosphorus
Sulphur
Silicon

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Engineering Materials
Weld decay is the phenomenon found with

Stainless steel
Cast iron
Mild steel
Nonferrous materials

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Engineering Materials
Which of the following material has nearly zero coefficient of expansion?

Invar
High speed steel
Heat resisting steel
Stainless steel

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

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

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