Which statement is NOT true regarding under tension belts?

The statement that is not true regarding under tension belts is that they improve energy efficiency. In reality, under tension belts do not enhance energy efficiency; rather, they can lead to a decrease in efficiency. When a belt is not adequately tensioned, it may slip or fail to transmit power effectively. This inefficiency can result in wasted energy, increased heat generation, and greater wear and tear on the system.

Under tension belts typically result in adverse effects on the overall operation of machinery. For example, they can cause irregular motion, leading to additional strain on bearings and other components. This strain can ultimately reduce the lifespan of these components, making it crucial to maintain proper tension for optimal performance. The other statements regarding under tension belts highlight these drawbacks, emphasizing the importance of correct tension for reliability and sustainability in machinery functioning.