USCG Exam PracticeElectrical troubleshooting and maintenance
When troubleshooting a series circuit with a voltmeter, a technician measures the full source voltage across a single component while all other components read zero volts. This indicates which condition?
- A. The component is shorted, diverting all current through it
- ✓ The component is open, and no current is flowing through the series pathCorrect
- C. The source voltage has increased beyond the rated value
- D. The other components in the series path have developed high resistance
Why B is correct
NEETS Mod. 1 §3-4 states that an open component in a series path reads the full source voltage across it while the other elements read zero. A shorted component, by contrast, reads zero volts across itself.
Cited:NEETS Mod. 1 §3-4