Belt, chain and rope are called rigid drives.
In flexible drives, rotary motion of driving shaft is directly converted to rotary motion of driven shafts
Explanation: It is first converted into translator and then into rotary.
Flexible drive can absorb shock loads and damp vibrations.
Explanation: Intermediate link is long and flexible.
Velocity ratio in both flexible and rigid drive is constant.
Explanation: In flexible drive, velocity ratio is not constant.
Is there any worry for overloading conditions in flexible belt drives?
Explanation: In case of overloading, belt slips over the pulley and hence protect it from the overload.
V belts have v shaped cross section.
Explanation: They have trapezoidal cross section.
The force of friction between belt and V grooved pulley is high.
Explanation: Due to wedge action, force of friction is high.
V belts result in smooth and quite operation even at high speeds.
Explanation: V belts are endless.
The efficiency of flat belt drive is 35%. If all the parameters are same and flat belt is replaced by V belt, than the efficiency of V belt will be?
Explanation: The efficiency of flat belt drive is more that V belt drive.
There is problem of bending stress in the V belt drive.
Explanation: The ratio of cross sectional height to pulley diameter is high.