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
We will be happy to hear your thoughts
A. 46 dB to 50 dB
B. 51 dB to 55 dB
C. 45 dB
D. 40 dB
Answer: 40 dB