Certified Pool Operator Practice Test

Question: 1 / 400

If the local health department requires raising the free chlorine to 5 ppm in a 120,000-gallon pool, how much sodium hypochlorite is needed?

2 gallons

3.5 gallons

The other options are incorrect because they are either too small or too large of quantities of sodium hypochlorite. Option A would not be enough to reach the desired 5 ppm in a large 120,000-gallon pool. Options C and D would likely result in an overdose of chlorine, which can be harmful to swimmers and can damage pool equipment. Option B is the most appropriate and accurate choice for achieving the required chlorine level in a 120,000-gallon pool.

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5.5 gallons

7 gallons

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