Design Against Fluctuating Load Practice Set

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1. Fatigue failure results due to fluctuating stresses when the stress magnitude is

2. The notch sensitivity factor (q) is given by

    Where, Kt and Kare theoretical and fatigue stress concentration factors

3. The reliability factor for using 50% reliability in design is

4. The surface finish factor for a highly polished component is

5. In cyclic loading, the effect of stress concentration is more serious in case of

6. The approximate relationship between endurance limit of rotating beam specimen (S’e) and ultimate tensile strength (Sut) in case of cast iron and cast steel components, is

7. The relationship between endurance limit of component subjected to fluctuating torsional shear stresses (Sse) to endurance limit in revered bending (Se) is

8. The factor of safety for machine parts subjected to reversed stresses is

9. A stress that varies in sinusoidal manner with respect to time from tensile to compressive (or vice versa) and which zero mean is called

10. The approximate relationship between endurance limit of rotating beam specimen (S’e) and ultimate tensile strength (Sut), in case of steel component, is


 

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Arbaj Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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