What could the service factor of a motor be?

The service factor of a motor indicates the level of overloading for which the motor is designed and can operate without overheating or suffering damage. This term reflects the motor's ability to handle increased loads in specific situations.

The options that mention unmarked values such as 1, 1.1, or 1.2, as well as 1.15 or larger, accurately represent typical service factors for various motors. A service factor of 1 means that the motor can handle its rated load continuously, while higher factors (such as 1.1, 1.15, 1.2, etc.) suggest increasing capabilities for short-term overload conditions. This means that these values effectively align with the commonly accepted range for service factors in motors, thereby making both choices valid and reinforcing the correct answer.

A service factor of 1.5 or higher, while it does exist, does not encompass the broader range represented in both B and C. Thus, the inclusion of both B and C as valid choices for typical service factors makes the composite answer accurate. Understanding these factors helps in selecting a motor that can withstand specific operational demands.