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Materials and Construction

Materials and Construction
A hardened steel essentially contains

Martensite
Troostite
Sorbite
None of these

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Materials and Construction
Cast iron is having very high

Tensile strength
All of these
Proximity between its elastic limit and ultimate breaking strength
Ductility

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Materials and Construction
Chilled iron castings are

Highly wear resistant
None of these
Soft on surface
Easily machinable

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Materials and Construction
Presence of silicon in steel

Decreases the blow holes formation tendency in castings
Is in the form of free Si
None of these
Indicates that steel is not deoxidised properly

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Materials and Construction
Addition of nickel to copper improves its

Strength
Machinability
Ductility
Hardness

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Materials and Construction
To improve the machinability of steel by its softening, it is subjected to

Shot blasting
Cold working
Heating
Annealing

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MORE MCQ ON Materials and Construction

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