Câu 20: CFPS: Certified Fire Protection Specialist
There are two different ambient noise levels that are required to meet fire alarm audibility goals and system design. The first is the average sound pressure levels (SPL) during the time the area is occupied. The second is the maximum SPL that lasts a specific minimum duration of time (in seconds). Per NFPA 72, which…
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There are two different ambient noise levels that are required to meet fire alarm audibility goals and system design. The first is the average sound pressure levels (SPL) during the time the area is occupied. The second is the maximum SPL that lasts a specific minimum duration of time (in seconds). Per NFPA 72, which of the following choices is the minimum duration required to meet the second ambient noise level?
Các lựa chọn
Đáp án được giữ gọn theo nhãn A, B, C, D trong phần bình chọn tương tác.
- A. 30 seconds
- B. 60 seconds — đáp án hiện tại
- C. 120 seconds
- D. 160 seconds
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