Design Against Fluctuating Load Objective Type Questions - Set 02 - ObjectiveBooks
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Design Against Fluctuating Load Objective Type Questions - Set 02

Practice Test: Question Set - 02


1. The maximum stress concentration factor for a rectangular plate with a transverse hole loaded in tension or compression is
    (A) 2
    (B) 3
    (C) 2.5
    (D) 1

2. Stress concentration occurs due to
    (A) Blow holes
    (B) Keyways and splines
    (C) Machining scratches
    (D) Any one of the above 

3. The surface finish factor for a highly polished component is
    (A) 0.89
    (B) 1
    (C) 0.85
    (D) 0.75

4. In cyclic loading, the effect of stress concentration is more serious in case of
    (A) Components made of brittle materials
    (B) Components made of ductile materials 
    (C) Components made of brittle as well as ductile materials
    (D) None of the above

5. A stress that varies in sinusoidal manner with respect to time from a minimum value to maximum value and which has some mean as well as amplitude value is called
    (A) Reversed stress
    (B) Fluctuating stress 
    (C) Repeated stress
    (D) Varying stress

6. The factor of safety for machine parts subjected to reversed stresses is
    (A) Ratio of yield strength to maximum stress 
    (B) Ratio of endurance limit to amplitude stress 
    (C) Ratio of ultimate tensile strength to maximum stress 
    (D) Ratio of endurance limit to mean stress

7. The relationship between endurance limit of component subjected to fluctuating torsional shear stresses (Sse) to endurance limit in revered bending (Se) is
    (A) Sse = 0.4 Se
    (B) Sse = 0.75 Se
    (C) Sse = 0.577 Se
    (D) Sse = π Se

8. The endurance limit of the component can be increased by
    (A) Increasing the size of component 
    (B) Shot peening 
    (C) Increasing the stress concentration
    (D) Coating

9. Stress concentration occurs due to
    (A) Abrupt change in cross-section
    (B) Discontinuities in component 
    (C) Internal cracks and flaws
    (D) Any one of the above

10. The approximate relationship between endurance limit of rotating beam specimen (S’e) and ultimate tensile strength (Sut), in case of steel component, is
    (A) S’e = 0.4 Sut
    (B) S’e = 0.75 Sut
    (C) S’e = 0.577 Sut
    (D) S’e = 0.5 Sut

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