Navy ICA Sound Powered Telephones Practice Test

During maintenance, why tag a line?

To label the line for testing frequency. To indicate it is out of service or scheduled for repair. To remind operators to save power. To indicate it is in use for priority traffic.

Correct Answer:

To indicate it is out of service or scheduled for repair.

Explanation:

During maintenance you tag a line to show it is not available for use. The tag communicates that the line is out of service or scheduled for repair, so operators and other personnel won’t connect or rely on it until maintenance is finished. This helps prevent accidental energizing, miswiring, or service interruptions and keeps everyone safe while work is being done. Tags may also note who is responsible and when the line should be checked again, and they’re removed once the line is ready to be used. The other options don’t fit because labeling for testing frequency, saving power, or signaling priority traffic aren’t the purpose of a maintenance tag.

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