ASTTBC RFPT — Fire Alarm Systems (AL) · Question
What happens to a Class A Data Communication Link (DCL) if a single wire break occurs?
A Class A circuit provides a redundant path. If the wire is broken, the panel can communicate with all devices from both directions of the loop.
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Question: What happens to a Class A Data Communication Link (DCL) if a single wire break occurs?
Answer options:
- The loop will short circuit.
- All devices will lose power. ✅ The system will report a trouble, but all devices remain operational.
- Only devices before the break will work.
Correct answer: The system will report a trouble, but all devices remain operational.
Explanation: A Class A circuit provides a redundant path. If the wire is broken, the panel can communicate with all devices from both directions of the loop.
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Question explanations
- Which of the following constitutes a system 'deficiency' rather than a 'non-conformance' to current standards?
- When a deficiency is corrected, what specific information MUST be recorded in the log?
- Which of the following would be categorized as a 'Non-Conformance' to the Installation Standard (S524) in an i
- In the event of a deficiency that renders the fire alarm system inoperative, what is the mandatory reporting r
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