CSLB C-10 Electrical ContractorSafety and TestingEasy
A qualified electrical worker is preparing to test the continuity of a de-energized 120V circuit. Which setting should be selected on a digital multimeter (DMM) for this task?
- ADC Voltage (V⎓)
- BAC Voltage (V~)
- CResistance (Ω)
- DAmperage (A)
Show answer & explanationAnswer & explanation
Correct answer: C. Resistance (Ω)
Continuity testing measures the resistance of a circuit to determine if there is an unbroken path for current. The resistance (Ω) setting on a DMM is specifically designed for this purpose.
Why the other options are wrong
- A. DC voltage measures direct current voltage, not continuity.
- B. AC voltage measures alternating current voltage, not continuity.
- D. Amperage measures current flow, and should not be used on a de-energized circuit for continuity.
Continuity Test
A test performed on a de-energized circuit to confirm an unbroken electrical path, typically using a multimeter's resistance function.
- Performed on de-energized circuits only.
- Measures resistance (ohms).
- Used to check for open circuits or short circuits.
Memory trick: Volt, Amp, Ohm: Know your DMM's role!