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24 Cards in this Set
- Front
- Back
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A group of becteria found in the intestines of warm blooded animals, includeing human beings, and also in plants, water, soil, and air are called?
a. colloids b. fecal coliform c. coliform d. pathogens |
c. coliform
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Chloringe is used in the water treatment process for which of the following purposes?
a. oxidation of iron b. romoval of H2S c. disinfection d. all of the above |
d. all of the above
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Which of the following are bacteria found in water?
a. cryptowporidium b. giardia c. poliovirus d. cholera |
d. cholera
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What tablet is always found the the coliform sampling twirl bag?
a. DPD b. sodium thiosulfate c. ammonia d. amperometric |
b. sodium thiosulfate
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What is the minium amt needed for coliform?
a. 25 mL b. 50 mL c. 100mL d. no minimum |
c. 100mL
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which of the following is the best scenario for disinfection?
a. High pH, high turbidity, high temp, high dosage, high dention time b.low pH, low turbidity, low temp, low dosage, low dention time c.low pH, low turbidity, high dosage, long dention time d. high pH, low temp, high dosage, low dention time |
c.low pH, low turbidity, high dosage, long dention time
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The addition of chloring until the demand is satisfied and the every drop of chloring added ends up as free residual is called??
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Breakpoint
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Which of the following conditions are favorable to nitification?
a. pH of 6.5 to 7.5, water temp 25 -30 C and free ammonia b. pH of 7.5 to 8.5, water temp 25 -30 C and free ammonia c. pH of 7.5 to 8.5, dark environment, water temp 30 -40 C and free ammonia d. None of the above |
b. pH of 7.5 to 8.5, water temp 25 -30 C and free ammonia
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true / false
Nitrites increase the chlorine demand? |
true
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true / false
in the pH range commonly found in WW, chlorine is present in which of the following forms? a. coliform b. monochloramines c. chloramines d. dichloramines |
b. monochloramines
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What is the measured from the point of chlorination to the point of chlorine residual sampling?
a. concentration b. contact time c. turbidity d. coliform |
b. contact time
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In which of the following Florida Administrative Codes are the chlorine regulations found?
a. 62-600 b. 62-601 c. 62-602 d. 62-699 |
b. contact time
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when taking samples for analysis by the lab, which of the following protocols must be followed?
a. sterile containers always b. only licensed operators may gather samples b. contact time d. add a preserviatve |
b. contact time
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The WTP uses 5.5mg/L to disinfect the treated water. The plant maintains 3.0 ppm free chlorine residual leaving the plant. What is the demand in mg/L?
a. 8ppm b. 2.5 mg/L c. 5.5 mg/L d. 3.0 ppm |
b. 2.5 mg/L
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How many pounds of chlorine can be drawn from a ton cylinder in a day?
a. 40 b. 100 c. 350 d. 400 |
d. 400
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a quart of liquid chlorine evaporate into how many quarts of chlorine gas?
a. 4 b. 45 c. 450 d. 400 |
c. 450
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a ton cylinder is placed on top of what device at the plant?
a. chlorinator b. PVC piping c. scale d. left of the pallet it came with |
c. scale
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how many ponds of chlorine can be drawn from a cylinder in 24 hours?
a. 40 b. 100 c. 400 d. depends on ambient temperature |
d. depends on ambient temperature
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How do you detect a chlorine leak?
a. nose b. ammonia c. sulfur dioxide d. sodium thiossulfate |
b. ammonia
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how so you detect a sulfur dioxide leak?
a. nose b. ammonia c. chlorine d. sodium thiossulfate |
b. ammonia
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what is the most common cause of chlorine leaks?
a. lead washer failure b. acid c. condensation d. corrosion |
a. lead washer failure
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The plant doses 10 MGD with 6 PPM chlorine. They have 2 PPM free residual? what is the demand???
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4 PPM
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CO Thomas uses 5.5 ppm of chlorine to treat 1.8 MGD. How many ponds of chlorine are sued daily?
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83 lbs
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the treatment plant has 2 1-ton cylinders on hand. They use 330 pounds a day how many days supply are on hand?
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12
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