Machine Design
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called

Ring nut
Castle nut
Sawn nut
Jam nut

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When a belt drive is transmitting maximum power,

Driving tension on tight side is twice the centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Effective tension is equal to centrifugal tension
Effective tension is half of centrifugal tension

ANSWER DOWNLOAD EXAMIANS APP