Red Seal Electrician Practice
Meters and troubleshootingQuestion 308 of 1506

Into which multimeter socket does the black test lead always plug?

  1. V
  2. COM
  3. A
  4. The fused socket
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Correct answer: COM

The black lead stays in the common socket. Only the red lead moves between voltage and current sockets.

Source: Troubleshooting Motors and Controls (Dickson-Self), 1.3: Meter Usage

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026