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Engineering Materials

Engineering Materials
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is

Vanadium
Chromium
Nickel
Cobalt

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Engineering Materials
Malleability of a material can be defined as

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

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

Nickel
Chromium
Tungsten
Vanadium

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Engineering Materials
Addition of lead and bismuth to aluminium results in

Improvement of casting characteristics
Improving machinability
Improvement of corrosion resistance
One of the best known age and precipitation hardening systems

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Engineering Materials
Which of the following impurity in cast iron makes it hard and brittle?

Sulphur
Silicon
Phosphorus
Manganese

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Engineering Materials
Corundum contains more than 95%

Steel
Al2O3
MgO
SiO2

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