Which two classifications describe motor duty?

Motor duty classifications are essential for understanding how electric motors operate under different conditions. Continuous duty refers to motors designed to operate continuously under load without overheating or suffering significant wear and tear. This classification is crucial for applications where a consistent output is required over an extended period, such as in agricultural or industrial irrigation pumps.

Intermittent duty, on the other hand, describes motors that operate for short periods, followed by rest periods. This classification is suitable for applications where the motor does not need to maintain a constant operation, allowing it to cool down during periods of inactivity. This could be applicable in scenarios where pumps are only needed to operate at intervals rather than continuously.

Together, these two classifications—continuous and intermittent—cover a broad range of motor applications, making option B the most accurate choice. Other classifications, such as cyclical or variable, may relate to operational patterns but do not capture the fundamental aspects of how motor duty is defined in terms of usage duration and frequency.