Recreational Vehicle (RV) Technician Practice Test

What tool might you use to measure voltage in a circuit?

1. Ammeter

2. Hydrometer

3. Multimeter

4. Ohmmeter

The correct answer is: Multimeter

To measure voltage in a circuit, utilizing a multimeter is the appropriate choice. A multimeter is a versatile tool that combines the functions of several meters into one device, allowing technicians to measure voltage (both AC and DC), current, and resistance. When set to the appropriate voltage setting, a multimeter can accurately provide readings of the electrical potential difference between two points in a circuit, which is crucial for diagnosing electrical issues in recreational vehicles. In contrast, an ammeter is designed specifically to measure current flowing through a circuit, and it cannot measure voltage directly. A hydrometer is used for measuring the specific gravity of liquids, often in battery applications but does not measure voltage. An ohmmeter, meanwhile, is intended for measuring resistance in a circuit, rather than voltage. Therefore, the multimeter stands out as the right tool for voltage measurements, providing technicians with essential insights regarding circuit functionality and health.