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Engineering Materials

Engineering Materials
According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is

0.0004
0.4 to 0.6%
0.6 to 0.8%
0.35 to 0.45%

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Engineering Materials
When medium carbon steel is heated to coarsening temperature

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

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Engineering Materials
The machinability of steel is improved by adding

Chromium
Sulphur, lead and phosphorus
Nickel
Nickel and chromium

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Engineering Materials
Which of the following display properties similar to that of steel?

Blackheart cast iron
None of these
Whiteheart cast iron
Both (A) and (B)

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Engineering Materials
Maximum percentage of carbon in austenite is

0.017
0.0026
0.00025
0.008

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Engineering Materials
Cast iron is characterized by minimum of following percentage of carbon

0.013
0.008
0.002
0.02

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