Meters and troubleshootingQuestion 626 of 1506

An electrician checks the current fuse of a multimeter by joining the two red sockets with the meter in resistance mode. What does a blown fuse show?

  1. O.L., meaning no continuity
  2. A very low resistance, near zero ohms
  3. A resistance equal to the battery voltage
  4. The same reading as a good fuse
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Correct answer: O.L., meaning no continuity

A good fuse reads a low resistance. The exact number does not matter.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 3.9: Safe Meter Usage

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026