Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Prep Guide

The most commonly used tool to measure voltage in electrical systems is a voltmeter. A voltmeter is specifically designed to measure the electric potential difference between two points in an electrical circuit, which is expressed in volts. It is connected in parallel to the circuit component across which the voltage needs to be measured. This tool is essential for diagnosing and troubleshooting electrical issues because it provides direct readings of voltage levels, helping technicians ensure that electrical components are operating within their specified voltage range.

While a multimeter can also measure voltage and is versatile for taking readings of current and resistance, it is a more general tool. An ammeter, on the other hand, is used to measure current flowing through a circuit, and an ohmmeter measures resistance. Therefore, in contexts specifically asking for a tool dedicated to measuring voltage, the appropriate answer would be a voltmeter.