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Environmental CDE
Environmental & Natural CDE
Question | Answer |
---|---|
1. What percentage of Americans receive water from public water systems? a. 65% b. 75% c. 85% d. 95% | C |
2. How are contaminant residues generally measured in drinking water? a. parts per thousand (ppt) b. parts per million (ppm) c. parts per billion (ppb) d. parts per hundred (pph) | B |
3. Which of the following toxic substances does not dissolve or suspend in water? a. heavy metals b. gasoline c. oil d. antifreeze | A |
4. How many deaths occur every year from waterborne infections caused by bacteria, viral or protozoan pathogens? a. 100 b. 500 c. 900 d. 1,000 | C |
5. How many gallons does it take to flood one acre, a foot deep (million acre-feet)? a. 320,828 b. 325,828 c. 328,828 d. 330,828 | B |
6. The largest consumer of water used in agricultural practices is _______. a. a bulking ingredient b. irrigation c. stock tanks d. food processing | B |
7. Irrigated acres in the United States produce what portion of the total marketable agricultural crops? a. 1/4 b. 1/3 c. 1/2 d. 2/3 | B |
8. What percentage of the human body is made up of water? a. 30% b. 65% c. 75% d. 90% | B |
9. The average American uses ______ gallons of water per day. a. 50 b. 90 c. 100 d. 200 | B |