Final answer:
Idler pulleys have multiple functions including reducing vibrations, adjusting belt tension, guiding belts around obstacles, and increasing the arc of contact. The correct answer is: E. All of the above.
Step-by-step explanation:
Idler pulleys are commonly used in mechanical systems to guide and support belts. They serve several important functions:
Idler pulleys reduce vibrations and belt whip: By adding additional support and tension to the belt, idler pulleys help to minimize unwanted vibrations and belt whip, which can improve the overall performance and efficiency of the system.
Idler pulleys adjust the belt tension to keep it constant: Idler pulleys can be moved or adjusted to maintain a constant tension in the belt. This is important because the correct tension ensures proper power transmission and prevents slippage.
Idler pulleys guide the belt around obstacles: In situations where a belt needs to travel around obstacles such as corners or other components, idler pulleys are used to guide the belt along the desired path.
Idler pulleys increase the arc of contact: By introducing an additional pulley, idler pulleys increase the arc of contact between the belt and the other pulleys in the system. This can improve power transfer and reduce wear and tear on the belt.
Therefore, the correct answer is E. All of the above.
Idler pulleys have multiple functions, including reducing vibrations, adjusting belt tension, guiding belts, and increasing the arc of contact; hence, all of the given statements are true.
Which of the following are true about idler pulleys? Idler pulleys serve several important functions in belt drive systems. Specifically, the statements that idler pulleys reduce vibrations and belt whip (A), adjust the belt tension to keep it constant (B), guide the belt around obstacles (C), and increase the arc of contact (D), are all true functions of an idler pulley. Therefore, the answer to this question is E. All of the above.