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Engineering Materials

Engineering Materials
Cartridge brass can be

Cold rolled into sheets
Any one of these
Formed into tube
Drawn into wires

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Engineering Materials
In malleable iron, carbon is present in the form of

Cementite
Nodular aggregates of graphite
Flakes
Free carbon

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

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

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Engineering Materials
The lower critical point for all steels is

913°C
723°C
600°C
700°C

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Engineering Materials
When low carbon steel is heated up to lower critical temperature

The grain size increases very rapidly
The average grain size is a minimum
There is no change in grain size
The grain size first increases and then decreases very rapidly

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Engineering Materials
Pearlite consists of

13% cementite and 87% ferrite
13% carbon and 87% ferrite
6.67% carbon and 93.33% iron
13% ferrite and 87% cementite

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