CFAA Fire Alarm Technician · Question
Three resistors of 10, 20, and 30 Ohms are connected in series. What is the total resistance?
In a series circuit, Rt = R1 + R2 + R3. 10 + 20 + 30 = 60 Ohms. CFAA Manual S1-Ch3.
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Question: Three resistors of 10, 20, and 30 Ohms are connected in series. What is the total resistance?
Answer options:
- 6.6 Ohms
- 10 Ohms
- 30 Ohms ✅ 60 Ohms
Correct answer: 60 Ohms
Explanation: In a series circuit, Rt = R1 + R2 + R3. 10 + 20 + 30 = 60 Ohms. CFAA Manual S1-Ch3.
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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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