Red Seal Electrician Practice
Meters and troubleshootingQuestion 184 of 1506

The circuit is energized and a voltmeter is placed across a good fuse. What should it read?

  1. The full source voltage
  2. Half of the source voltage
  3. Close to zero volts
  4. Twice the source voltage
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Correct answer: Close to zero volts

A good protection device has very low resistance, so it drops almost no voltage. Source voltage across it means it is blown.

Source: Troubleshooting Motors and Controls (Dickson-Self), 1.2: Electrical Fundamentals

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026