Which instrument is typically used to measure voltage in electrical circuits during maintenance?

• A. Oscilloscope
• B. Voltmeter
• C. Multimeter
• D. Ammeter

Answer: (C)

In maintenance, you measure voltage with a versatile instrument that can read electrical potential difference and handle other checks in one tool. This is the multimeter, because it includes a voltmeter function for both DC and AC voltage, and it also lets you measure current, resistance, continuity, and more. That breadth makes it the typical choice on the shop floor, since you can quickly verify voltage levels, check for proper power delivery, and compare readings to specifications without swapping tools. An oscilloscope can show how voltage changes over time and is great for waveform analysis, but for routine, quick voltage checks in circuits, the multimeter is preferred. A dedicated voltmeter measures voltage but isn’t as versatile for the variety of maintenance tasks you commonly encounter, and an ammeter measures current, not voltage.