An operator is working on a piece of machinery that is producing noise at 105 DBA. The company threshold level is at 85 DBA with 5 DBA exchange rate. The local authority is 90 DBA with 3 DBA exchange rate. How long can this operator be exposed without any control and still respect both limits?

Show your work The lower explosive limit (LEL) of xylene is 1%. In a room where xylene solution is being sprayed, an engineer uses a calibrate combustible gas meter to determine that the xylene concentration is 10% of the LEL. What is the concentration of xylene in this room? 1,000 parts per million (ppm) 10,000 […]

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