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

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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the speed of belt increases,

The power transmitted will increase
The power transmitted will decrease
The coefficient of friction between the belt and pulley decreases
The coefficient of friction between the belt and pulley increases

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
Elastic nut is a locking device in which

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end
One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening a screw
Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Machine Design