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Engineering Materials

Engineering Materials
Which is false statement about case hardening? Case hardening is done by

Electroplating
Cyaniding
Induction hardening
Nitriding

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Engineering Materials
Malleability of a material can be defined as

Ability to undergo large permanent deformations in tension
All of these
Ability to undergo large permanent deformations in compression
Ability to recover its original form

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Engineering Materials
Induction hardening is the process of

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

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Engineering Materials
The hardness of steel primarily depends on

Percentage of alloying elements
Percentage of carbon
Heat treatment employed
Shape of carbides and their distribution in iron

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Engineering Materials
Pig iron is the name given to

Iron in molten form in the ladles
Iron containing huge quantities of carbon
Product of blast furnace made by reduction of iron ore
Raw material for blast furnace

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Engineering Materials
Sulphur in steel

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

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