CFAA Fire Alarm Technician · Question
If a positive conductor of a DC signaling circuit touches a grounded conduit, what type of trouble signal is generated?
Fire alarm control units indicate a 'Ground Fault' trouble signal when a circuit makes unintended contact with the building ground.
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Question: If a positive conductor of a DC signaling circuit touches a grounded conduit, what type of trouble signal is generated?
Answer options:
- Open circuit fault
- Short circuit fault ✅ Ground fault
- Communication error
Correct answer: Ground fault
Explanation: Fire alarm control units indicate a 'Ground Fault' trouble signal when a circuit makes unintended contact with the building ground.
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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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