CFAA Fire Alarm Technician · Question
Which of the following tests is restricted ONLY to unsealed (vented) lead-acid batteries?
Specific Gravities should only be checked on 'Unsealed' (vented) lead-acid batteries. Most modern systems use sealed (VRLA) batteries where this is impossible/n
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Question: Which of the following tests is restricted ONLY to unsealed (vented) lead-acid batteries?
Answer options:
- Voltage under load
- Corrosion on terminals
- Electrolyte level in sealed batteries ✅ Specific gravity of the electrolyte (unsealed only)
Correct answer: Specific gravity of the electrolyte (unsealed only)
Explanation: Specific Gravities should only be checked on 'Unsealed' (vented) lead-acid batteries. Most modern systems use sealed (VRLA) batteries where this is impossible/not required.
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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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