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Engineering Materials

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

Malleability
Ductility
Elasticity
Plasticity

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Engineering Materials
Maximum percentage of carbon in austenite is

0.008
0.0026
0.017
0.00025

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Engineering Materials
The presence of hydrogen in steel causes

Improved Weldability
Embrittlement
Corrosion resistance
Reduced neutron absorption cross-section

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Engineering Materials
The percentage of carbon in grey iron castings usually varies between

5 to 7%
0.5 to 1%
0.012
2.5 to 4.5%

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Engineering Materials
Hardness of lower bainite (tempered martensite) is about

RC 80
RC 65
RC 48
RC 57

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Engineering Materials
The strength is the ability of a material to resist

None of these
Deformation under stress
Fracture due to high impact loads
Externally applied forces with breakdown or yielding

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