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Engineering Materials

Engineering Materials
Eutectoid reaction occurs at

600°C
1493°C
723°C
1147°C

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Engineering Materials
Large forgings, crank shafts, axles normally contain carbon up to

0.20 to 0.45%
0.55 to 1.0%
0.45 to 0.55%
0.05 to 0.20%

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Engineering Materials
Maximum percentage of carbon in austenite is

0.008
0.017
0.00025
0.0026

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Engineering Materials
Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio

40 : 30 : 20 : 10
50 : 20 : 10 : 20
50 : 20 : 20 : 10
30 : 20 : 30 : 20

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Engineering Materials
Weld decay is the phenomenon found with

Stainless steel
Cast iron
Nonferrous materials
Mild steel

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Engineering Materials
The machinability of steel is improved by adding

Nickel
Nickel and chromium
Chromium
Sulphur, lead and phosphorus

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