# Water Treatment Questions and Answers (Q&A)

Danny R. Glover, Editor
The correct answer to this item is letter D. To get the surface area of a circle, one must use the formula r squared multiply by pi. Since the radius is not given, divide the diameter by 2. So,...Read More

313 views
H. Martin, Content Writer
The answer to this is B. In order to solve this, you need to divide the gallons with the square feet which means that 2,800,000 that you will divide with 500. The answer that you will get is 5600...Read More

289 views
RagweedFarmer
500 pounds
math constant: 1mg/l=1ppm, (1 milligram per liter = 1 part per million)
math constant: water weighs 8.34 pounds per gallon
math constant: 1 pound is 1ppm of 1 million...Read More

284 views
E.Ronald
Well water is filtered from harmful bacteria and organisms naturally. Because the rainwater or snow soak down into the ground, it is naturally filtered; however, water that is gathered from lakes...Read More

269 views
RagweedFarmer
15,708 cu ft
math constant: area of a circle formula, diameter squared x 0.7854 (0.7854 is 1/4th of pi, 3.1416 / 4=0.7854)
step 1: 50x50x0.7854=1,963.5 square feet at base of clarifierRead More

262 views
RagweedFarmer
149,600 gallons
math constant: 1 cubic foot holds 7.48 gallons
20,000 x 7.48 = 149,600...Read More

261 views
Samantha Stewart, Philanthropist
The question does not suggest that the shape is irregular and so to calculate the answer in cubic feet, you merely have to multiply the length by the width by the height of the basin. It is...Read More

250 views
H. callum, Content Writer
The flocculation refers to the chemical term about precipitation in a cloud or chemical situation. A basin is similar to the shape of a bowl. If there is a rectangular flocculation basin, then it...Read More

246 views
RagweedFarmer
67.554lbs per day
math constant: 1 mg/L= 1 ppm (part per million) 1 gram is 1000th of a liter, 1 milligram is 1000th of a gram 1000x1000 = 1,000,000, so 1mg/L is one millionth of a literRead More

239 views
John Smith
Discard scratched or etched sample tubes
Fill the tubes with samples and standards that have been agitated thoroughly, and allow sufficient time for bubbles to escape.

239 views
RagweedFarmer
92mL/min, 92.0297
There are two difficult aspects to this problem, specific gravity, and the percentage of alum in the solution.
Math Constant: Specific gravity of water = 1

238 views
E. Austin
The correct answer to this question is E, 1.56%. To get this answer, we can divide the given values in the word problem. We will divide the 28 thousand gallons of filter water by the 1.8 million...Read More

236 views
RagweedFarmer
2.1
mg/l and ppm are the same
1.6 million gallons x 8.34lbs per gallon = 13.344 million pounds, so 13.344 is 1ppm of 1.6 million gallons
28lbs / 13.344 =2.0983213 rounded to...Read More

233 views
John Smith
To gather together fine, light particles to form larger particles (floc) to aid the sedimentation and filtration processes

232 views
RagweedFarmer