Engine: Electricity

1. A The live-dead-live test proves the functional ability of the voltage tester to measure voltage prior to and after conducting the absence-of-voltage test which validates the results of the absence-of-voltage test.
2. B The live-dead-live test proves the functional ability of the voltage tester to measure voltage after conducting the absence-of-voltage test which validates the results of the absence- of-voltage test.
3. C The live-dead-live test proves the functional ability of the voltage tester to measure voltage prior to conducting the absence-of-voltage test which validates the results of the absence-of- voltage test.
4. D The absence-of-voltage test proves the functional ability of the voltage tester to measure voltage prior to and after conducting the live-dead-live test which validates the results of the live- dead-live test.

Tip: press A-D to answer