Practice Quiz

CompTIA A+ 220-901

Category - Hardware and Network Troubleshooting

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A multimeter should read between 115V and 120V when:
  1. Connecting the black lead to ground and the red lead to hot in an electrical socket in the USA.
  2. Connecting the red lead to ground and the black lead to hot in an electrical socket in the USA.
  3. Connecting the black lead to ground and the red lead to hot in an electrical socket in Europe.
  4. Connecting the red lead to ground and the black lead to hot in an electrical socket in Europe.
Explanation
Answer: A - A multimeter should read between 115V and 120V when connecting the black lead to ground and the red lead to hot in the USA.

Key Takeaway: A multimeter is an electrician’s tool that allows you to measure certain electrical components. In the USA, Voltage should read around 115V when connecting a multimeter to an electrical outlet, as opposed to Europe where it’s around 220V. The black lead of a multimeter should always connect to the ground, and the red should always connect the hot.
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