What is the maximum noise level that 1s permissible in a library?

What is the maximum noise level that 1s permissible in a library?

Q. What is the maximum noise level that 1s permissible in a library?

A.            46 dB to 50 dB

B.            51 dB to 55 dB

C.            45 dB

D.            40 dB

Answer: 40 dB

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