English Instructor Manual (PDF) - Metric Version - National ...
English Instructor Manual (PDF) - Metric Version - National ...
English Instructor Manual (PDF) - Metric Version - National ...
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APPENDIX Q<br />
Calculations Homework<br />
1. What is the surface area a circular spa with a 3.66 metre diameter?<br />
2. What is the volume of a circular spa with an 3.66 metre diameter and a constant depth of 1<br />
metre?<br />
3. What is the surface area of a rectangular pool with a length of 50 metres and a width of 20<br />
metres?<br />
4. What is the volume of a rectangular pool with a length of 50 metres, a width of 25 metres,<br />
and a depth ranging from 3 metres in the shallow end to 5.5 metres in the deep end?<br />
5. What is the surface area of a rectangular pool with a length of 20 metres and a width of 10<br />
metres?<br />
6. What is the volume of a rectangular pool with a length of 20 metres, a width of 10 metres,<br />
and a depth ranging from 1 metre in the shallow end to 2 metres in the deep end?<br />
7. Calculate the Saturation Index for water that has a total alkalinity of 120 mg/L, a pH of 7.6,<br />
a calcium hardness of 400 mg/L, a temperature of 40°C, and a total dissolved solids of 800<br />
mg/L. If it is not balanced, fi x it.<br />
8. Calculate the Saturation Index for water that has a total alkalinity of 50 mg/L, a pH of 7.0, a<br />
calcium hardness of 120 mg/L, a temperature of 28°C, and a total dissolved solids of 400<br />
mg/L. If it is not balanced, fi x it.<br />
9. Calculate the Saturation Index for water that has a total alkalinity of 30 mg/L, a pH of 7.0, a<br />
calcium hardness of 100 mg/L, a temperature of 40°C, and a total dissolved solids of 600<br />
mg/L. If it is not balanced, fi x it.<br />
10. Adjust the ALKALINITY from 40 mg/L to 100 mg/L in a 9,500 litre spa using sodium<br />
bicarbonate.<br />
11. Neutralize the FREE CHLORINE from 7 mg/L to 3 mg/L in a 750,000 litre pool. Use<br />
Sodium Thiosulfate.<br />
12. Adjust the CALCIUM HARDNESS from 120 mg/L to 200 mg/L in a 230,000 litre pool. Use<br />
Calcium Chloride 77%.<br />
13. How much CALCIUM HYPOCHLORITE is needed to breakpoint chlorinate a 1,512,000 litre<br />
pool if the free chlorine is 0.6 mg/L and the total chlorine is 1.5 mg/L?<br />
14. How much SODIUM HYPOCHLORITE is needed to breakpoint chlorinate a 285,000 litre<br />
pool if the free chlorine is 0.8 mg/L and the total chlorine is 1.5 mg/L?<br />
15. How much LITHIUM HYPOCHLORITE is needed to breakpoint chlorinate a 190,000 litre<br />
pool if the free chlorine is 1.2 mg/L and the total chlorine is 1.5 mg/L?<br />
Page 212<br />
© 2014 <strong>National</strong> Swimming Pool Foundation®
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