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Engineering Materials

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

Silicon
Nickel
Magnesium
Manganese

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Engineering Materials
When medium carbon steel is heated to coarsening temperature

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

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Engineering Materials
In high speed steels, manganese is used to tougher the metal and to increase its

Melting point
Yield point
Critical temperature
Hardness

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Engineering Materials
White metal contains

63 to 67% nickel and 30% copper
Alloy of tin, lead and cadmium
88% copper and 10% tin and rest zinc
Silver and chromium

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Engineering Materials
The stiffness is the ability of a material to resist

Fracture due to high impact loads
None of these
Deformation under stress
Externally applied forces with breakdown or yielding

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Engineering Materials
Neutral solution is one which has pH value

Equal to 7
Less than 7
Greater than 7
pH value has nothing to do with neutral solution

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