CFAA Fire Alarm Technician · Question
A notification appliance circuit has an operating voltage of 24VDC and draws 0.5A. What is the total resistance of the load?
Using Ohm's Law (V=IR), R = 24V / 0.5A = 48 Ohms. CFAA Manual S1-Ch2.
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Question: A notification appliance circuit has an operating voltage of 24VDC and draws 0.5A. What is the total resistance of the load?
Answer options:
- 12 Ohms ✅ 48 Ohms
- 0.02 Ohms
- 96 Ohms
Correct answer: 48 Ohms
Explanation: Using Ohm's Law (V=IR), R = 24V / 0.5A = 48 Ohms. CFAA Manual S1-Ch2.
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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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