NCCER Millwright Practice Exam 2026 – The Comprehensive All-in-One Guide for Exam Success!

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What is the role of a V-belt in mechanical systems?

To connect electrical components

To transmit power between pulleys

The role of a V-belt in mechanical systems is primarily to transmit power between pulleys. This is achieved through the belt's design, which features a cross-section shaped like a "V." This shape allows the belt to fit snugly into the grooves of the pulleys, increasing the contact surface area and enhancing friction. As a result, the V-belt can effectively transfer rotational motion and torque from one pulley to another, making it an essential component in various applications, such as conveyor systems, fans, and pumps.

In addition to its power transmission role, V-belts are known for their flexibility and ability to operate over varying distances between pulleys, accommodating different mechanical designs. Their efficiency and capability to handle moderate loads make them a popular choice in many industrial and mechanical settings.

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To support heavy loads

To measure speed

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