Current ramping can be used to identify problems with a motor:
A) that will not operate at all due to a total loss of brush-to-armature contact internally
B) that has intermittent symptoms or is not operating at peak efficiency
C) that is located in a circuit with a blown fuse
D) that is located in a circuit that is disconnected from the battery

Question

Quizplus · Accepted Answer

Current ramping is a diagnostic technique used to evaluate the electrical performance of a motor by gradually increasing the current flow and observing its effects. This method is particularly useful for identifying motors that have intermittent symptoms or are not operating at peak efficiency, as it allows for the observation of performance under varying electrical loads. Choices A, C, and D describe conditions where the motor is completely non-operational due to a total loss of internal connection, a blown fuse, or a disconnection from the power source, respectively, which current ramping cannot diagnose because the motor would not respond to changes in current under these conditions.

Current Ramping Can Be Used to Identify Problems with a Motor