Which of the following indicates high current draw on a motor's startup?

The choice indicating high current draw on a motor's startup is locked rotor current. This term refers to the current flowing when a motor is first energized, but the rotor is not yet turning (i.e., locked). During this initial phase, the motor experiences a high inrush of current because it faces the maximum load with no rotational motion to generate back EMF (Electromotive Force). This high current draw can be several times greater than the motor's full load current, highlighting the need for careful consideration of power supply capabilities and circuit protection to handle these initial surges.

Full load current, in contrast, is the steady-state current a motor draws when operating at its rated load after it has started and reached its operating speed. The service factor is a multiplier related to how much capacity a motor can handle above its rated load without overheating, while efficiency rating refers to how effectively a motor converts electrical energy into mechanical energy. None of these terms are indicative of the high transient current condition that occurs at startup, making locked rotor current the clear choice.