What does a multimeter measure?

• A. Temperature
• B. Current, Voltage, and Resistance
• C. Pressure
• D. Frequency

Answer: (B)

A multimeter is a versatile instrument used in electrical and electronic work to measure multiple electrical parameters. The capability of measuring current, voltage, and resistance makes it an essential tool in diagnosing and troubleshooting electrical circuits.

When measuring current, the multimeter can determine how much electrical flow is present in a circuit. For voltage measurements, it can assess the potential difference between two points, providing insights into circuit operations and health. Finally, when measuring resistance, the multimeter can help determine how well an electrical component can resist the flow of current, which is crucial for identifying faulty components or ensuring correct values in circuit designs.

Each of the other choices refers to measurements that a multimeter typically does not provide. For example, while a specific type of meter measures temperature, pressure, and frequency, a standard multimeter's primary function revolves around the three electrical measurements mentioned. This combination of capabilities makes it an invaluable tool for aviation machinist mates, who often need to perform electrical diagnostics in various components of aircraft systems.