Machine Design
When a belt drive is transmitting maximum power,

Effective tension is half of centrifugal tension
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

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because

Belts are available in sets
Only one belt cannot be fitted with other used belts
The new belt will carry more than its share and result in short life
New and old belts will cause vibrations

ANSWER DOWNLOAD EXAMIANS APP