SC Fire Alarm Practice Questions - South Carolina Fire Alarm Contractor Examination Exam

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Per NFPA 72 (2019), where audible appliances are provided to awaken occupants in sleeping areas, the alarm signal shall be which of the following?

A 3 kHz high-frequency tone only A low-frequency square wave with a fundamental of 520 Hz ± 10 percent Any tone the manufacturer ships as a default horn A temporal-four CO pattern

Correct Answer:

A low-frequency square wave with a fundamental of 520 Hz ± 10 percent

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