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
Coaxing is the procedure of increasing

Fatigue limit by over-stressing the metal by successively increasing loadings
Metal hardness by surface treatment
Metal strength by cycling
Metal resistance to corrosion by coating

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will

Move towards right of the bearing making no metal to metal contact
Move towards right of the bearing making the metal to metal contact
Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that

It is subjected to a higher stress than the outer side
It is more stretched than the outer side during the manufacturing process
It is subjected to a higher cyclic loading than the outer side
It has a lower curvature than the outer side

ANSWER DOWNLOAD EXAMIANS APP