Heating, Ventilation, and Air Conditioning (HVAC ) Electrical Practice Test

Which device is commonly used to measure voltage in a circuit?

1. Ampermeter

2. Multimeter

3. Wattmeter

4. Ohmmeter

The correct answer is: Multimeter

The device commonly used to measure voltage in a circuit is the multimeter. A multimeter is a versatile instrument that can measure various electrical parameters, including voltage, current, and resistance. When set to the appropriate mode, it can accurately measure the voltage across two points in a circuit, allowing technicians to diagnose electrical issues or verify circuit functionality. While other devices, such as an ammeter and a wattmeter, serve distinct purposes—measuring current and power respectively—they are not primarily used for voltage measurements. An ohmmeter, on the other hand, measures resistance, which is also not relevant to voltage measurements. Therefore, the multimeter stands out as the appropriate tool for measuring voltage effectively in numerous HVAC and electrical applications.