ASTTBC RFPT — Fire Alarm Systems (AL) · Question
Which of the following best describes the performance of a Class B Data Communication Link (DCLB) during a single short-circuit event?
DCLB is similar to Class B. If a short circuit occurs, that circuit is disabled (loss of devices), whereas DCLA or DCLC with isolators would maintain operation.
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Question: Which of the following best describes the performance of a Class B Data Communication Link (DCLB) during a single short-circuit event?
Answer options: ✅ A single short circuit will cause a loss of communication to all devices on the link
- A single open will cause a loss of communication to all devices on the link
- A single ground fault will cause an immediate alarm signal
- A single short circuit will result in an immediate release of the fire suppression gas
Correct answer: A single short circuit will cause a loss of communication to all devices on the link
Explanation: DCLB is similar to Class B. If a short circuit occurs, that circuit is disabled (loss of devices), whereas DCLA or DCLC with isolators would maintain operation. DCLB has no redundant path.
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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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