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Engineering Materials

Engineering Materials
The percentage of carbon in grey iron castings usually varies between

5 to 7%
0.012
2.5 to 4.5%
0.5 to 1%

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Engineering Materials
The bond formed by transferring electrons from one atom to another is called

None of these
Ionic bond
Covalent bond
Metallic bond

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Engineering Materials
Bronze contains

70% copper and 30% zinc
70 - 75% copper and rest tin
90% copper and 10% tin
85 - 92% copper and rest tin with little lead and nickel

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

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

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Engineering Materials
Closed packed hexagonal space lattice is found in

Zinc, magnesium, cobalt, cadmium, antimony and bismuth
Alpha-iron, tungsten, chromium and molybdenum
Gamma-iron, aluminium, copper, lead, silver and nickel
None of these

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Engineering Materials
The material in which the atoms are arranged regularly in some directions but not in others, is called

Crystalline material
Amorphous material
None of these
Mesomorphous material

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