Question

question 70 of 100 · multiple choice
crowned faced pulleys are used on belt conveyors because?
a the crown decreases the belt tension
b the crown increases the belt tension
c the crown aids the training of the belt
d the crown increases the pulley width

Explanation:

Analyze the purpose of a crowned pulley

A crowned pulley has a slightly larger diameter at its center than at its edges. As a belt runs over a crowned pulley, the belt naturally seeks the highest point of the crown (the center) due to lateral tension forces.

Evaluate the given options

• (A) and (B) are incorrect because crowning is not primarily used to adjust overall belt tension.
• (C) is correct because "training" refers to keeping the belt centered and tracking properly along the conveyor path.
• (D) is incorrect because crowning does not increase the physical width of the pulley.

Answer:

• (A) the crown decreases the belt tension
• (B) the crown increases the belt tension
• (C) the crown aids the training of the belt (Correct answer)
• (D) the crown increases the pulley width