Question

A machine in steel plate fabricating
industry is found to be producing a sound
level of 50 dB. In the expansion plans one
such machine needs to be added.
What will be the combined noise level?
a) 80-100dB
b) 101 -150 dB
c) 51 -70dB
d) 40-50dB
more​

Answer 1

Option (C) 51 - 70 dB is 100% correct answer.