Acceptable noise level in industries -: (A) 25-30 dB, (B) 30-40 dB, (C) 40-50 dB, (D) 60-80 dB
Answer is C. Ans. is 'c' i.e., 40 50 dBAcceptable Noise levelsEnvironmentPlaceAcceptable noise level dB (A)ResidentialBed room25Living room40 Office35-45CommercialConference40-45 Restaurants40-60IndustrialWorkshoopWorkshoop40-6040-50EducationalClass room30-40Library35 - 40HospitalsWards20-35