Machine Design
The connecting rod bolts are tightened up with initial tension greater than the external load so that

The resultant load on the bolt would not be affected by the external cyclic load
Bolts are weakest elements
Joint may not open up
Bolts will not loosen during service

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the belt speed increases

Power transmitted increases to a maximum value and then decreases
Power transmitted remains the same
Power transmitted decreases
Power transmitted increases

ANSWER DOWNLOAD EXAMIANS APP