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Engineering Materials

Engineering Materials
The lower critical point for all steels is

700°C
600°C
913°C
723°C

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Engineering Materials
Ferromagnetic alpha iron exists in temperature range of

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

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Engineering Materials
Which is false statement about normalizing? Normalizing is done to

Induce stresses
Reduce segregation in casting
Refine grain structure
Improve mechanical properties

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Engineering Materials
Age-hardening is related with

German silver
Duralumin
Gun metal
Stainless steel

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Engineering Materials
Nickel when added to copper improves

Hardness
Hardness and strength
Machinability
Strength and ductility

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Engineering Materials
A material is said to be allotropic, if it has

Any one of the above
Fixed structure at all temperatures
Different crystal structures at different temperatures
Atoms distributed in random pattern

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