NEIEP Mechanics Practice Exam

When using a digital multimeter, what jack is the red lead plugged into for all measurements except current?

1. Common Jack

2. Volt/Ohm Jack

3. Current Jack

4. Test Jack

The correct answer is: Volt/Ohm Jack

When using a digital multimeter for various measurements such as voltage and resistance, the red lead is typically inserted into the Volt/Ohm Jack. This configuration allows the multimeter to measure both AC and DC voltage levels, as well as the resistance of components in ohms. The Volt/Ohm Jack is specifically designed for these types of measurements and provides the settings necessary for accurate readings. In contrast, the Current Jack is exclusively used for measuring current, requiring a different setup because current measurements necessitate the multimeter to be placed in series with the circuit. The Common Jack usually serves as the ground reference point or return path for all measurements, while the Test Jack is not a standard designation on most multimeters, further suggesting that it does not apply in this context. This clarity in jacks and their specific applications is essential for correctly using a multimeter effectively.