Machine Design
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads

Compression
Combined loads
Shear
Tension

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Obtain variable moment of inertia (I) in each leaf
Permit each leaf to act as an overhanging beam
Have variable bending moment (M) in each leaf
Make M/I constant throughout the length of the leaf

ANSWER DOWNLOAD EXAMIANS APP