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Engineering Materials

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

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

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Engineering Materials
Depth of hardness of steel is increased by addition of

Nickel
Vanadium
Chromium
Tungsten

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Engineering Materials
Gun metal contains

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

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Engineering Materials
Solder is an alloy consisting of

Lead and zinc
Tin, antimony, copper
Tin and lead
Tin and copper

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Engineering Materials
1841 high speed steel contains

Vanadium 4%, chromium 18% and tungsten 1%
Vanadium 1%, chromium 4% and tungsten 18%
Vanadium 18%, chromium 1% and tungsten 4%
None of these

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Engineering Materials
Gamma iron exits at following temperature

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

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