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Engineering Materials

Engineering Materials
An eutectoid steel consists of

Pearlite and cementite
Wholly austenite
Pearlite and ferrite
Wholly pearlite

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Engineering Materials
Tensile strength of steel can be safely increased by

Adding carbon up to 2.8%
Adding small quantities of copper
Adding carbon up to 0.83%
Adding carbon up to 6.3%

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Engineering Materials
In nodular iron, graphite is in the form of

Spheroids
Flakes
Free carbon
Cementite

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Engineering Materials
Induction hardening is the process of

Heating and cooling rapidly
Increasing hardness throughout
Inducing hardness by continuous process
Hardening surface of work-piece to obtain hard and wear resistant surface

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Engineering Materials
Depth of hardness of steel is increased by addition of

Chromium
Nickel
Tungsten
Vanadium

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Engineering Materials
When filing or machining cast iron makes our hands black, then it shows that ________ is present in cast iron.

Both A and B
Cementite
Free graphite
None of these

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