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Mechanical Metallurgy

Mechanical Metallurgy

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1. Which is the structure insensitive property?

Yield Stress
Fatigue Strength
Elastic constant
None of the above
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2. One of the yielding criteria for ductile material is Von Mises Criteria also known as

Maximum shear stress criteria
Minimum shear stress criteria
Creation energy criteria
Distortion energy criteria
Discuss Here

3. Vacancy is the one dimensional defect comes under the category of

Point defect
Dislocation defect
Surface defect
Volume defect
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4. What is the slip plane defined for Gold (Au) which has FCC structure?

{101}
{100}
{111}
none of the above
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5. Array of edge dislocation is called______

Twist boundary
Tilt boundary
Twin boundary
Grain boundary
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6. Angle for the low angle grain boundary is

Equal to 10 degree
Greater than 10 degree
Smaller than 10 degree
Smaller than 1 degree
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7. The total number of slip system is defined for Zinc

3
6
9
12
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8. Which one of the following instrument can be used for observing edge dislocation during the analysis of a sample in the lab

Scanning electron microscopy
Transmission electron microscopy
Atomic spectroscopy
Optical microscopy
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9. Magnitude of the Burger vector for Polonium is

a
2a
3a
4a
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10. Area under the elastic region on Stress strain curve is

Toughness
Resilience
Elastic limit
Proportional limit
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11. Angle between burger vector and tangent vector for screw dislocation is

0 degree
30 degree
45 degree
90 degree
Discuss Here

12. Plane stress condition is defined for the

Large body
Long body
Thin body
Thick body
Discuss Here





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