🔍 Key Concepts

• Absence-of-voltage test – confirming that a circuit is truly de-energized before working on it • Live-dead-live test – using a known energized (live) source, then the circuit under test (dead), then a known energized source again • Verification of the voltage tester – proving the test instrument is actually working correctly

💭 Think About

• Ask yourself: What sequence of checks (live, dead, live) is actually being described in each answer choice? Which answer clearly includes both the before and after check on a known live source? • Separate in your mind the purpose of the absence-of-voltage test (checking the circuit) from the purpose of the live-dead-live test (checking the tester). Which statements are mixing those two jobs up? • Think about safety: Why would you want to test your meter on something you know is energized both before and after checking the circuit you hope is de-energized?

✅ Before You Answer

• Identify which options clearly describe three steps: measure known live, measure suspected dead, measure known live again. • Check which choices confuse the role of the absence-of-voltage test versus the live-dead-live test. The live-dead-live test’s main point is to confirm the tester’s functionality, not the circuit’s condition. • Verify that the correct description must show the tester proving it can read voltage both prior to AND after the absence-of-voltage test, not just one or the other.