ASTTBC RFPT — Fire Alarm Systems (AL) · Question
On a Class A Data Communication Link (DCLC), what percentage of devices must remain operational during a single open circuit?
Table 1 for DCLC (Class A) states that after a single open, all devices must remain functional. A trouble signal is required however.
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Question: On a Class A Data Communication Link (DCLC), what percentage of devices must remain operational during a single open circuit?
Answer options:
- 0%
- 50% ✅ 100%
- Only devices before the break
Correct answer: 100%
Explanation: Table 1 for DCLC (Class A) states that after a single open, all devices must remain functional. A trouble signal is required however.
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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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