Question

The dosage of ozone is about ________ ppm residual ozone.

a.

2 to 3 ppm

b.

2 to 4 ppm

c.

1 to 5 ppm

d.

Zero

Posted under Mechanics of Materials

Answer: (a).2 to 3 ppm

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Q. The dosage of ozone is about ________ ppm residual ozone.

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