What is a common characteristic of capacitor start, capacitor run motors?

The common characteristic of capacitor start, capacitor run motors is that they are designed for high-torque, larger horsepower applications. This design feature is particularly beneficial for motors that need to start under a significant load, as the starting capacitor provides an initial boost of energy that helps the motor overcome inertia when starting. Once the motor reaches a certain speed, the run capacitor takes over, enabling efficient operation during the motor's running phase.

In regard to the other options, while capacitor start, capacitor run motors can be efficient, their primary focus is on providing the necessary starting torque for demanding applications rather than being associated specifically with low efficiency ratings. They also operate on alternating current (AC), not direct current (DC), which makes the first option inaccurate. Lastly, these motors do require a run capacitor for their operation after starting, which makes the last option incorrect. Therefore, the focus on their design for high torque applications is what correctly identifies the primary characteristic of these motors.