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Engineering Materials

Engineering Materials
Chromium when added to steel _________ the tensile strength.

Does not effect
None of these
Increases
Decreases

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Engineering Materials
A cold chisel is made of

Mild steel
Cast iron
H.S.S.
High carbon

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Engineering Materials
Sulphur in steel

Acts as deoxidiser
Lowers the toughness and transverse ductility
Reduces the grain size
Decreases tensile strength and hardness

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Engineering Materials
The hardness and tensile strength in austenitic stainless steel can be increased by

Hardening and cold working
Full annealing
Normalizing
Martempering

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Engineering Materials
Compressive strength of grey cast iron in tonnes/cm is of the order of

1015
710
57
35

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Engineering Materials
Process of Austempering results in

Lamellar layers of carbide distributed throughout the structure
Martenistic structure
Formation of bainite structure
Carburised structure

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