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Engineering Materials

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

More than
Equal to
None of these
Less than

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

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

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Engineering Materials
Tensile strength of steel can be safely increased by

Adding carbon up to 6.3%
Adding small quantities of copper
Adding carbon up to 0.83%
Adding carbon up to 2.8%

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Engineering Materials
The alloying element which can replace tungsten in high speed steels is

Cobalt
Vanadium
Molybdenum
Nickel

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Engineering Materials
Neutral solution is one which has pH value

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

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Hot hardness
Creep
Fatigue
Hot tempering

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