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Engineering Materials

Engineering Materials
Cold rolled steel sheets contain carbon of the following order

0.004
0.006
0.002
0.001

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Engineering Materials
Hematite iron ore contains iron about

0.3
0.55
0.7
0.45

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

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

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Engineering Materials
The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is

1050°C
910°C
Below recrystallization temperature
770°C

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Engineering Materials
Steel containing ferrite and pearlite is

Tough
Hard
Hard and tough
Soft

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Engineering Materials
In which of the following cases, consideration of creep is important

Cycle chains
Flywheel of steam engine
Cast iron pipes
Gas turbine blades

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