Maintenance Technician Practice Test 2025 – Your All-in-One Guide to Exam Success

A multimeter is the appropriate tool for measuring voltage in electrical systems because it is specifically designed to measure various electrical properties, including voltage, current, and resistance. This versatility allows technicians to diagnose and troubleshoot electrical circuits effectively. A multimeter can be set to the voltage measurement function, providing accurate readings of AC or DC voltage in a circuit.

In contrast, a circuit breaker is used to protect electrical circuits by interrupting the flow of electricity in case of overload or short circuits, but it does not measure voltage. An oscilloscope is a more advanced tool used primarily for visualizing electrical signals over time, making it useful for observing waveforms rather than directly measuring voltage in a straightforward manner. Finally, a wattmeter is designed to measure power (in watts) in a circuit, rather than voltage, making it unsuitable for this specific measurement task.