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Engineering Materials

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

Fatigue
Creep
Hot hardness
Hot tempering

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Engineering Materials
Ductility of a material can be defined as

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

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Engineering Materials
A reversible change in the atomic structure of steel with corresponding change in the properties is known as

Solidus change
Physical change
Allotropic change
Molecular change

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Engineering Materials
The following element can't impart high strength at elevated temperature

Nickel
Silicon
Magnesium
Manganese

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Engineering Materials
In malleable iron, carbon is present in the form of

Nodular aggregates of graphite
Free carbon
Cementite
Flakes

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Engineering Materials
Which of the following has highest specific strength of all structural materials?

Titanium alloys
Magnetic steel alloys
Chromium alloys
Magnesium alloys

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