CFAA Fire Alarm Technician · Question
What happens to the remaining appliances in a parallel notification circuit if one appliance becomes an open circuit?
In a parallel circuit, if one branch opens, the others remain connected to the voltage source and continue to operate, though total current will decrease.
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Question: What happens to the remaining appliances in a parallel notification circuit if one appliance becomes an open circuit?
Answer options:
- All appliances stop working
- The fuse will immediately blow
- The voltage in other branches increases ✅ Remaining branches continue to operate normally
Correct answer: Remaining branches continue to operate normally
Explanation: In a parallel circuit, if one branch opens, the others remain connected to the voltage source and continue to operate, though total current will decrease.
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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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