CFAA Fire Alarm Technician · Question
What component is typically found within a notification appliance (bell/strobe) that allows supervisory current to bypass the device while in the normal state?
In notification circuits, a blocking diode prevents the supervisory current from flowing through the siren/strobe coils. This ensures current only flows through
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Question: What component is typically found within a notification appliance (bell/strobe) that allows supervisory current to bypass the device while in the normal state?
Answer options: ✅ Blocking diode
- Zener diode
- Capacitor
- Transistor
Correct answer: Blocking diode
Explanation: In notification circuits, a blocking diode prevents the supervisory current from flowing through the siren/strobe coils. This ensures current only flows through the EOL, supervising the wires. If the diode is shorted, the appliance would constantly draw from the supervisory circuit.
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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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