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Engineering Materials

Engineering Materials
Chromium when added to steel _________ the tensile strength.

Increases
None of these
Does not effect
Decreases

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Engineering Materials
Delta iron occurs at temperature of

Above melting point
Between 1400°C and 1539°C
Room temperature
Between 910°C and 1400°C

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Engineering Materials
Which of the following element results in presence of free graphite in C.I.?

Manganese
Carbon
Silicon
Sulphur

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Engineering Materials
Preheating is essential in welding

All nonferrous materials
Cast iron
High speed steel
All of these

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Engineering Materials
Neutral solution is one which has pH value

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

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Engineering Materials
Isotropic materials are those which have the same

Elastic properties in all directions
Electric and magnetic properties in all directions
Stresses induced in all directions
Thermal properties in all directions

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