CFAA Fire Alarm Technician · Question
Ionization-type smoke detectors are generally more responsive to which type of fire?
Ionization detectors use Americium-241 to ionize the air; smoke particles attach to ions, reducing current flow. This makes them more sensitive to fast-flaming
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Question: Ionization-type smoke detectors are generally more responsive to which type of fire?
Answer options: ✅ Fast-flaming fires with invisible particles
- Slow smoldering fires with large particles
- Steam from showers and bathrooms
- Dust from construction activities
Correct answer: Fast-flaming fires with invisible particles
Explanation: Ionization detectors use Americium-241 to ionize the air; smoke particles attach to ions, reducing current flow. This makes them more sensitive to fast-flaming fires with small particles.
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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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