NM CID ES-3 Practice Questions - New Mexico CID ES-3 Low Voltage Special Systems (Under 50 Volts) Examination Exam

An optical time-domain reflectometer (OTDR) is the preferred instrument when you need to:

Measure only the DC resistance of a copper pair Characterize a fiber span, locate reflective events (connectors, breaks), and estimate length from backscatter Apply Temporal-3 tones to a NAC Set 70-volt speaker taps

Correct Answer:

Characterize a fiber span, locate reflective events (connectors, breaks), and estimate length from backscatter

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