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Engineering Materials

Engineering Materials
Nickel when added to copper improves

Hardness and strength
Hardness
Strength and ductility
Machinability

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

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

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Engineering Materials
Tungsten when added to steel __________ the critical temperature.

None of these
Lowers
Does not effect
Raises

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Engineering Materials
1841 high speed steel contains

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

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Titanium alloys
Magnetic steel alloys
Chromium alloys
Magnesium alloys

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Engineering Materials
In compression, a prism of brittle material will break

By forming a bulge
By crushing into thousands of pieces
By shearing along oblique plane
In direction perpendicular to application of load

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