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Engineering Materials

Engineering Materials
Hardness of martensite is about

RC 65
RC 57
RC 48
RC 80

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Engineering Materials
Gun metal contains

70 - 78% copper and rest tin
85 - 92% copper and rest tin with little lead and nickel
90% copper and 10% tin
70% copper and 30% zinc

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Engineering Materials
Isotropic materials are those which have the same

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

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Engineering Materials
The cupola is used to manufacture

Pig iron
Cast iron
Steel
Wrought iron

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Engineering Materials
The ratio of the volume occupied by the atoms to the total volume of the unit cell is called

Space lattice
None of these
Coordination number
Atomic packing factor

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

Silicon
Manganese
Sulphur
Carbon

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