CFAA Fire Alarm Technician · Question
During the verification of a networked fire alarm system, what is the expected result of a single ground fault on the Data Communication Link (DCL)?
Under S537, a single ground fault or wire break must be simulated during verification to ensure the network can still transmit signals (if DCLA/Style 7).
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Question: During the verification of a networked fire alarm system, what is the expected result of a single ground fault on the Data Communication Link (DCL)?
Answer options:
- The system should automatically shut down to prevent damage ✅ The system must continue to communicate (if wired as Class A/DCLA) and report a trouble signal
- The system should immediately trigger a full building evacuation
- The fault should be ignored by the system to prevent nuisance alarms
Correct answer: The system must continue to communicate (if wired as Class A/DCLA) and report a trouble signal
Explanation: Under S537, a single ground fault or wire break must be simulated during verification to ensure the network can still transmit signals (if DCLA/Style 7).
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Question explanations
- The primary power for a fire alarm system must be:
- If a 120VAC primary power circuit for a fire alarm control unit is consuming 60 Watts of power, what is the cu
- In a steady-state DC circuit, if the conductor length is doubled while maintaining voltage and wire gauge, wha
- A resistor is rated at 10 Watts at 24VDC. If the voltage drops to 20VDC, what is the new power dissipation?
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