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Engineering Materials

Engineering Materials
Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.

Less than
None of these
More than
Equal to

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

Below 723°C
910 to 1440°C
770 to 910°C
1400 to 1539°C

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Engineering Materials
The hardness is the property of a material due to which it

Can be rolled or hammered into thin sheets
Breaks with little permanent distortion
Can be drawn into wires
Can cut another metal

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

None of these
Mesomorphous material
Crystalline material
Amorphous material

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Engineering Materials
Delta iron occurs at temperature of

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

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Engineering Materials
The percentage of carbon in low carbon steel is

0.15%
0.5%
0.3%
0.05%

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