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You should AVERAGE answering each question in less than 100 seconds for this exam Note: All of the following questions contain only one best answer. Circle the letter that best corresponds with the question. |
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1. |
Examples of Preliminary treatment in a wastewater treatment plant are: |
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a. |
dissolved and colloidal organic matter. |
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b. |
disinfection |
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c. |
bar racks and screens |
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d. |
WAS and RAS |
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2. |
EPA Form 3320 must be completed each month and submitted to the Georgia EPD by: |
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a. |
the first of every month |
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b. |
the 15th of the next month |
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c. |
the end of every month |
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d. |
the end of the year |
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3 |
A sample that is collected at a particular instant of time and reflects the source material conditions is a/an: |
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a. |
Grab sample |
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b. |
Automated sample |
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c. |
Composite sample |
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d. |
Flow proportional composite |
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4 |
The explosion in the growth rate of algae is called: |
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a. |
air stripping |
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b. |
decomposition |
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c. |
photosynthesis |
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d. |
a bloom |
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5 |
A cubic foot of water contains 7.48 gallons of water. A gallon of water weighs 8.34 pounds. How many gallons of water are in a circular tank 37 feet high and 85 feet in diameter? |
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a. |
209,956 |
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b. |
1,570,475 |
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c. |
1,751,037 |
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d. |
73509 |
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6 |
Retention (detention or residence) times in tanks are measured in terms of the volume divided by the flow rate. What is the retention time for a sedimentation basin 135 feet long by 45 feet wide and 11 feet deep when the flow is 2.75 MGD? |
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a. |
5 hours 26 minutes |
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b. |
4 hours 52 minutes |
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c. |
4 hours 36 minutes |
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d. |
3 hours 82 minutes |
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7 |
Determine the median value of the following data. 220,7200,230,300,240,270,240,250,240,260 |
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a. |
945 |
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b. |
245 |
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c. |
300 |
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d. |
250 |
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8 |
The two controls of a Chemical feed pump are: |
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a. |
concentration and on/off switch |
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b. |
accelerator and gearshift |
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c. |
rate and stroke |
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d. |
influent control valve and ppm |
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9 |
A 100 HP motor should be |
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a. |
greased daily |
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b. |
pulsed on until up to speed |
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c. |
turned on no sooner than once in twenty minutes |
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d. |
always "soft started" |
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10 |
MSDS is an acronym for |
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a. |
Material Storage Data System |
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b. |
Management Safety Data System |
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c. |
Maintenance and Safety Data Storage |
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d. |
Material Safety Data Sheet |
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11 |
The secondary effluent flow at a treatment plant is 4.8 MGD. After 30 minutes of contact time, the chlorine residual is measured at 0.5 mg/L. If the chlorinator is feeding chlorine at the rate of 300 lbs/day, what is the chlorine dosage? |
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a. |
20.0 mg/L |
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b. |
8.36 mg/L |
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c. |
7.49 mg/L |
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d. |
2009.6 mg/L |
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12 |
In the immediately previous question, what is the chlorine demand? |
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a. |
19.5mg/L |
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b. |
7.86 mg/L |
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c. |
11959.6 mg/L |
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d. |
7.0 mg/L |
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13 |
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a. |
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b. |
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c. |
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d. |
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14 |
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a. |
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b. |
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c. |
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d. |
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15 |
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a. |
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b. |
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c. |
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d. |
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