Red Seal Electrician Practice
Meters and troubleshootingQuestion 733 of 1506

A 1 to 5 V instrument signal reads 2 V at the indicator. What percent of the measured range is this?

  1. 40 percent, found as 2 V of 5 V
  2. 20 percent, found as 1 V of 5 V
  3. 50 percent, found as 2 V of 4 V
  4. 25 percent
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Correct answer: 25 percent

The span is 4 V, and 2 V is 1 V above the 1 V zero: 1/4 = 25 percent.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 9.2: Voltage Signal Systems

Practice meters and troubleshooting

Questions last reviewed: 18 October 2026