Correct option is A
In a
multiple V-belt drive, all the belts
work together to transmit power evenly. If one belt breaks, it is essential to
replace all the belts at the same time to maintain uniform tension and wear.
Uneven Load Distribution:
· If only one belt is replaced, the new belt will have
different tension and wear characteristics than the older belts.
· This leads to
uneven power transmission, causing premature failure of the remaining belts.
Slipping and Misalignment:
· The
new belt may be tighter than the old ones, leading to
unequal grip on the pulleys, increasing slippage.
Increased Wear and Reduced Efficiency:
· Uneven belt wear reduces the overall efficiency of the system and increases the risk of
further belt failures.
