Insulation of __________ over a base concrete floor is obtained by us – McqOptions

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1.	Insulation of __________ over a base concrete floor is obtained by using resilient surface material on floors.
A.	1-5 dB
B.	5-10 dB
C.	12-15 dB
D.	17-25 dB
Answer» C. 12-15 dB

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