Stress induced in the balls or rollers of rolling contact be

Stress induced in the balls or rollers of rolling contact bearing is: torsional shear stress tensile stress crushing stress contact stress Distortion Energy and Maximum Shear Stress theories give the same factor of safely is: pure shear stress only unit-axial stress only all of the above none of the above A fatigue factor of safety that is less than 1 means: the part will fail after 1/2 cycle the part will fail after N >10^5 cycle the part will fail after N

Solution

1. Stress induced in the balls or rollers of rolling contact bearing:

(d) contact stress

2. Distortion energy and maximum shear stress theories give the same factor of safety:

(c) for both uniaxial and pure shear.

3. A fatigue factor of safety that is less than 1 means:

(c) the part will fail after N <10^6 cycles which is the endurance limit.

4. cold working

(a) increases fatigue strength

5. A column which can carry maximum buckling load has:

(c) both ends fixed

6. Fracture mechanics is the science of:

all three (a), (b) and (c)

7. In cyclic loading effect of stress concentration is more serious in case of:

(a) components made of brittle materials

8. Fatigue failure due to fluctuating stresses when stress magnitude is

(c) lower than Sy.