Brittle Fracture MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Brittle Fracture”.

1. Which of the following fracture mechanisms in which the crack propagates more rapidly?
a) Ductile fracture
b) Brittle fracture
c) Fatigue
d) It doesn’t occur during fracture

2. Below which point does brittle fracture occur?
a) Ultimate tensile strength
b) Fracture point
c) Elastic limit
d) Yield point

3. Which of the following is associated with minimum plastic deformation?
a) Ductile fracture
b) Brittle fracture
c) Fatigue
d) It doesn’t occur during fracture

4. Cleavage planes are a term associated with ductile fracture.
a) True
b) False

5. The tendency of brittle fracture increases with:
a) Increasing temperature
b) Increase in strain rate
c) Decrease in strain rate
d) It doesn’t depend on temperature or strain rate

6. Which of the theory is related to brittle fracture?
a) Laundau theory
b) Dirac hole theory
c) Valence bond theory
d) Griffith’s theory

7. The tendency of brittle fracture increases with:
a) Decreasing temperature
b) Increasing temperature
c) Decrease in strain rate
d) It doesn’t depend on temperature or strain rate

8. Which of the following statement is true regarding the toughness of a metal?
a) Energy consumed is less in ductile fracture than brittle fracture
b) Energy consumed is more in ductile fracture than brittle fracture
c) Energy consumed in the brittle fracture is same as the ductile fracture
d) Energy consumed is more in brittle fracture than ductile fracture

9. The graph for Griffith’s crack is ____________
a) An ellipse
b) A circle
c) A straight line
d) A hyperbola

10. Surface energy of the specimen increases when the crack lengthens.
a) True
b) False

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