10 free CEM practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
CEM Practice Test 7Tutor mode
Question 1 of 10
Energy Audits and Instrumentation
Capacitors on a motor control center that feeds many VFDs keep blowing fuses. Before recommending a fix, the auditor wants a week-long record on the three-phase feeder showing how distorted the current is and how real, reactive and apparent power vary with production. Which instrument should be connected?