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Engineering Materials

Engineering Materials
Manganese in steel increases its

Hardness
Tensile strength
Ductility
Fluidity

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

Molecular change
Physical change
Solidus change
Allotropic change

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Engineering Materials
When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.

Less than
None of these
More than
Equal to

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Engineering Materials
A material is known as allotropic or polymorphic if it

Has its atoms distributed in a random pattern
Responds to heat treatment
Exists in several crystal forms at different temperatures
Has a fixed structure under all conditions

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Engineering Materials
The alloying element which can replace tungsten in high speed steels is

Vanadium
Cobalt
Molybdenum
Nickel

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Engineering Materials
When the steel is normalized, its

Ultimate tensile strength increases
All of these
Yield point increases
Ductility decreases

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MORE MCQ ON Engineering Materials

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