Final answer:
The claim that single-phase motors perform as well as three-phase motors is false. Three-phase motors are typically more efficient and suitable for demanding applications. High-performance motors are crucial for energy efficiency and operating cost reduction.
Step-by-step explanation:
The statement whether single-phase motors perform as well as three-phase motors of comparable horsepower is false. Three-phase motors are generally more efficient, have a more balanced power supply, and smoother operation compared to single-phase motors. They are often used in industrial and commercial settings where consistent, reliable power and higher efficiency are needed. It is important to use high-performance motors because they offer better efficiency, which translates into energy savings, reduced operational costs, and a lower environmental impact over the lifespan of the motor. Check Your Understanding: The statement that the efficiency of a simple machine is always less than 100 percent is true, as some input work is inevitably converted to heat energy due to friction.