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Engineering Materials

Engineering Materials
The alloying element which reduces the formation of iron sulphide in steel is

Chromium
Manganese
Vanadium
Nickel

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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
None of these
Cementite
Free graphite

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Engineering Materials
Which is false statement about tempering? Tempering is done to

Improve machinability
Improve toughness
Release stresses
Improve ductility

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Engineering Materials
Iron ore is usually found in the form of

Oxides
All of these
Carbonates
Sulphides

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Engineering Materials
The ability of a material to resist softening at high temperature is known as

Creep
Hot hardness
Fatigue
Hot tempering

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

None of these
Decreases
Does not effect
Increases

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