In a multiple V- belt drive, when a single belt is damaged, it is preferable to change the complete set to
(a) reduce vibration
(b) reduce slip
(c) ensure uniform loading
(d) ensure proper alignment
This question was addressed to me by my school principal while I was bunking the class.
This is a very interesting question from Types of Belts in chapter Belt, Rope and Chain Drives of Machine Kinematics