Mechanical Metallurgy Mock Test 6

10%

Question 1 of 10

1. The Gerber line is shown by which of the following curve/line?

Not shown in the figure

Question 1 of 10

Question 2 of 10

2. A copper plate with an initial crack length of 30 mm is subjected to the stress of 500 MPa normal to crack. If the yield strength of the copper is 1000 MPa, Find the plastic zone size? Assume the plate is infinity wide.

3.5 mm

10 mm

1.19 mm

2.1 mm

Question 2 of 10

Question 3 of 10

3. Of the total failure of all the industrial components, the fatigue fracture accounts for how much percentage of fault?

90%

50%

20 %

10%

Question 3 of 10

Question 4 of 10

4. The following diagram is the correct representation of the Goodman diagram.

False

True

Question 4 of 10

Question 5 of 10

5. The J integral method is used for the _______________ materials.

low strength ductile material

high strength brittle material

low strength brittle material

high strength plastic materials

Question 5 of 10

Question 6 of 10

6. The c (fatigue ductility exponent) is a ______________

negative integer

positive fraction

positive integer

negative fraction

Question 6 of 10

Question 7 of 10

7. The following diagram shows crack deformation mode. Which mode of fracture is shown?
$mechanical-metallurgy-questions-answers-fracture-mechanics-stress-intensity-factor-q5$

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Mode-III

Mode-I

Mode-II

Question 7 of 10

Question 8 of 10

8. The following figure represents the hysteresis loop for cycle softening of the material.

False

True

Question 8 of 10

Question 9 of 10

9. Which of the following does not play a role in fatigue failure?

Corrosion

Temperature

Stress concentration

Sample size

Question 9 of 10

Question 10 of 10

10. Load vs. notch displacement curve for very brittle elastic material is given by the following curve.
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True

False

Question 10 of 10