Machine Design
Pick up wrong statement. Fatigue strength can be increased by

Cold working
Shot peening
Grinding and lapping surface
Hot working

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The fatigue stress concentration factor is defined as

The product of the endurance limits with and without stress concentration
All of these
The ratio of endurance limit without stress concentration to the endurance limit with stress concentration
The ratio of endurance limit with stress concentration to the endurance limit without stress concentration

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In worm, gears, pitch lead angle is

The angle between the tangent to the pitch helix and the plane of rotation
Half the angle between two inclined faces in axial plane
The angle between the tangent to the pitch helix and an element of the cylinder
None of these

ANSWER DOWNLOAD EXAMIANS APP