Fatigue MCQ’s

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

1. What can be height of an extrusion or an intrusion which is responsible for crack initiation in case of fatigue (in cm?
a) 2*10-6
b) 2*10-8
c) 10-5
d) 10-8

2. Which of the following is the most common type of failure in industry?
a) Brittle fracture
b) Ductile fracture
c) Creep
d) Fatigue

3. Which of the following is failure of material due to cyclic stress?
a) Brittle fracture
b) Ductile fracture
c) Creep
d) Fatigue

4. Below which point does fatigue occur?
a) Ultimate strength
b) Fracture point
c) Elastic limit
d) Yield point

5. Corrosion can increase fatigue life.
a) True
b) False

6. The S-N curve for mild steel never becomes a horizontal line.
a) True
b) False

7. Which of the following is not a zone of fatigue fracture?
a) Zone of crack nucleation
b) Fatigue zone
c) Elastic zone
d) Final fracture

8. What is the speed of the motor in rotating beam fatigue test?
a) 200 rpm
b) 500 rpm
c) 1000 rpm
d) 1500 rpm

9. In Wohler’s Fatigue test, how many cycles can cast iron to be subjected to before failure?
a) 10,000,000
b) 100,000,000
c) 5,000,000
d) 1,000,000

10. Which of the following is not a theory of fatigue?
a) Orowan theory
b) Griffith’s theory
c) Fatigue limit theory
d) Wood’s theory

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