Question: A worker operates a machine for 8 hours / day . The worker is exposed to 8 5 dBA noise when the machine is operating
A worker operates a machine for hoursday The worker is exposed to dBA noise when the machine is operating at low speed, dBA when it is operating at full speed, and dBA when the machine is idle. The noise level with the corresponding exposure time is presented in the table below. The total noise dose the worker is exposed to is most nearly:
tableNoise Level dBAExposure Time hours
A
B
C
D
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