CME Study Guide 2026
Everything you need to pass the CME exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CME Exam Format at a Glance
📚 CME Topics to Study (21)
✍️ Sample CME Questions & Answers
1. What is the purpose of a contactor's auxiliary contact in a motor control circuit?
The normally-open auxiliary (sealing) contact creates a parallel path around the momentary start pushbutton, latching the coil circuit closed after the button is released.
2. What is the consequence of non-compliance in CME professional practice?
Non-compliance can result in significant consequences including monetary fines, suspension or revocation of professional licenses, civil or criminal liability, lawsuits, and lasting damage to professional reputation.
3. When grounding an indoor separately derived AC system, such as a dry-type transformer, which of the following must be used as the grounding electrode?
NEC 250.30(A)(4) mandates that for an indoor separately derived system, the building or structure's existing grounding electrode system must be used as the grounding electrode for the new system. This ensures all grounded systems within the building are bonded together, minimizing potential differences.
4. What is the consequence of failing to adhere to electrical codes and standards?
Failing to adhere to electrical codes and standards carries severe consequences, as these regulations are designed to prevent hazards. Non-compliant installations significantly increase the risk of electrical fires, shocks, and equipment damage, potentially leading to serious injuries or even fatalities. Additionally, such failures can result in costly fines, legal liabilities, and invalidated insurance claims.
5. When sizing the supply conductors for an industrial machine per NEC 670.4(A), what is the minimum ampacity required relative to the machine's full-load current rating?
NEC 670.4(A) requires supply conductors for industrial machinery to be sized at not less than 125% of the machine's nameplate full-load current.
6. Why is energy efficiency important in electrical systems design?
Energy efficiency in electrical systems design focuses on minimizing wasted energy, which directly translates to lower electricity bills and reduced operational costs over the system's lifespan. Furthermore, by consuming less energy, the system contributes to a smaller carbon footprint and reduced demand on power generation, thereby minimizing environmental impact. It's a key aspect of sustainable and cost-effective design.