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Engineering Materials

Engineering Materials
Which of the following property is desirable for materials used in tools and machines?

Ductility
Malleability
Plasticity
Elasticity

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Engineering Materials
The defect which takes place due to imperfect packing of atoms during crystallization is known as

None of these
Surface defect
Line defect
Point defect

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Engineering Materials
Maximum percentage of carbon in ferrite is

0.001
0.00025
0.0006
0.0025

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Engineering Materials
For the allotropic forms of iron, the points of arrest are

The points of discontinuity
The points where there is no further flow of metal
The points where no further change occurs
Constant for all metals

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Engineering Materials
Following elements have face-centered cubic structure

Gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt
Mg, Zn, Ti, Zr, Br, Cd
All of these
A iron (below 910°C and between 1400 to 1539°C), W

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Engineering Materials
The metal suitable for bearings subjected to light loads, is

Silicon bronze
Phosphor bronze
White metal
Monel metal

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