CIH Study Question Answer Key 020

CIH Category: Noise

The noise from a motor is measured to be 73 dBA. If a second identical motor is added and both motors are running at the same time, what would you expect the combined sound level from both motors to be?

a) 146 dBA
b) 90 dBA
c) 76 dBA
d) 105 dBA

The Answer is “c” 76 dBA


Comprehensive CIH Review

Planning to take the CIH Exam next Spring? Sign-up for our Comprehensive CIH Review to make sure you’re ready for test day!

Review classes begin in February 2015.