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Engineering Materials

Engineering Materials
High carbon steel carries carbon percentage

0.8 to 1.5%
0.1 to 0.3%
0.6 to 0.8%
0.3 to 0.6%

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Engineering Materials
Vanadium in high speed steels

Promotes decarburisation
Provides high hot hardness
Promotes retention of austenite
Forms very hard carbides and thus increases wear resistance

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Engineering Materials
Which of the following when used in ordinary low carbon steels, makes the metal ductile and of good bending qualities?

Sulphur
Phosphorus
Silicon
Manganese

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Engineering Materials
Dislocations in materials refer to the following type of defect

Plane defect
Line defect
Volumetric defect
Point defect

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

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

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Engineering Materials
Delta iron occurs at temperature of

Above melting point
Between 910°C and 1400°C
Room temperature
Between 1400°C and 1539°C

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