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60 Cards in this Set
- Front
- Back
- 3rd side (hint)
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When organic wastes are discharge to receiving waters, oxygen is depleted by |
Bacteria |
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Employee hazards include A. Noxious or toxic gases or vapors B. Oxygen deficiency C. Physical injuries D. All of the above |
hazards D. All of the above |
Use your head |
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Oxygen sulfide gives off an odor similar to |
C. Rotten eggs |
Bad Breakfast |
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Coliform bacteria are |
Indicators |
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3 water borne diseases are |
Typhoid fever, dysentery, cholera |
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A cylindrical tank has 10 ft in diameter and 20 ft in height. What is the approximate capacity in liters? A. 44450 B. 31030 C. 5942 D. 4445 |
A. 44450 (10 X 10 = 100) (100 X .785 = 78.5) (78.5 X 20 = 1,570 ft2) 1,570 ft2 X 7.48 = 11,743.6 gallons) (11,743.6 gallons X 3.79 = 44508.2 liters) |
(Diameter2 X .785 x height = ft2) (ft2 x 7,84 = gallons) (gallons x 3.79 = liters) |
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Immediate first aid for burns is to |
flood with cold water |
cool when hot |
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Which of the pH readings indicates an acidic wastewater? A. 3 B. 7 C. 9 D. 12 |
A. 3 |
below 7 is acidic 7 is neutral above 7 is alkaline |
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If water weighs 8.34 lbs/gal, how much will 7.5 gal weight? A. 50.8 lbs B. 62.5 lbs C. 75.6 lbs D. 77.3 lbs |
B. 62.5 7.5 gal X 8.34 = 62.55 |
amount of gallons X the weight of one gallon 8.34 = total gallons weight. |
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One mL is what fraction of a L? A. 1/10 B. 1/100 C. 1/1000 D. 1/100000 |
C. 1/1000 |
Thousandths place |
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Your pump ran continuously for 24 hours and delivered 288000 gal. The Capacity of the pump is _____ gpm. A. 100 B. 200 C. 1000 D. 12000 |
B. 200 (288000/24 = 12,000) 12,000/60 = 200) |
(gal/hours = amount per hour) (amount per hour/min in an hour = gallons per minute) |
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A possible cause of electric motor failure is? A. Dirt B. Moisture C. Friction D. All of the above |
failure D. All of the above |
Multiple reasons can cause motor failure |
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Approximately how many gallons of wastewater would 600 ft of 6 inch pipe hold? A. 740 B. 880 C. 900 D. 930 |
B. 880 (6 inches is = to .5 ft2) (.5 X .5 = .25 square ft) (.25 square ft X .785 = 0.19625) ( 0.19625 X 600 Length = 117.75 ft2) (117.75 ft2 X 7.48 = 880.77) |
(convert inches to ft2) (diameter2 = ft2) (ft2 X .785 = area of circle) (area X length = total ft2) ( ft2 X 7.48 = gallons) |
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A water seal on a pump serves a dual purpose. It acts as a lubricant and it also |
B. Keeps the gritty material from entering the packing box |
blocks stuff |
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The elevation of any pump above the source of supply should not exceed _______ ft. A. 2.2 B. 22 C. 200 D. 224 |
B. 22 |
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Friction in a pipeline causes |
Loss of pressure |
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Before repairing a pump's electrical circuit, what actions should you take? |
Disconnect the circuit breaker, place red tag stating "do not activate," and lock out |
Known as lock out tag out |
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Pump maintenance includes A. Checking operating temperature of bearings B. Checking packing gland C. Operating two or more pumps of the same size alternatively to equalize wear D. All of the above |
Maintenance D. All of the above |
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When routinely inspecting a centrifugal pump, it is noted by the operator that the bearings are excessively hot. This could be caused by |
Over lubrication |
There is a such thing as to much |
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In a centrifugal pump, internal leakage is prevented by |
Wear rings |
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A valve that allows water to flow in one direction only is a ____ valve. |
Check |
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An outfall is |
The line leaving the plant |
contains effluent |
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Centrifugal pump parts include a |
Impeller |
spin spin |
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Which indicates a good quality domestic activated sludge? |
Brown color and musty odor |
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A wastewater with a pH of 6.8 would be considered |
Acidic |
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Fresh wastewater usually appears |
Gray |
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gpcd is |
Gallons per capita per day |
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Each person contributes |
100 gallons per day of wastewater |
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Wastewater is |
Used water and solids that flow to the treatment plant |
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In Iowa wastewater facilities are classified as |
Grade I, II, III, IV, IL, IIL |
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To obtain your first level of operators certification you need |
A high school diploma and one year operating experience |
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What state agency regulates publicly owned treatment plants? |
DNR Department of natural resources |
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What is a POTW? |
Publicly owned treatment plant |
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How many regional office does DNR have in Iowa? |
6 |
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DNR is the |
Department of natural resources |
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the term :influent" means |
Wastewater flowing into a tank, holding pound, reservoir, basin, treatment process, or plant |
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The term "Effluent" means |
Wastewater flowing from a tank, holding pond, reservoir, basin, treatment process, plant |
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Preliminary and primary treatments are the same A. True B. False |
B. False Preliminary treatment refers to the removal of large solids, oils, fat and other material from sewage so as to protect waste-water treatment facilities engaged in further treatment. Primary Treatment Wastewater is a plain sedimentation process to remove suspended organic solids from the sewage. Chemical are sometimes used to remove finely divided and colloidal solids. |
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The definition of "pollution" is |
The impairment of water quality which threatens aquatic and human health |
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"Hydraulic loading" is |
Refers to the flows to a treatment plant or process |
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" Organic loading" is |
The BOD loading on a treatment plant or process |
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"Scum" is |
The solids that float on the surface of a tank or clarifier |
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"Biosolids" are |
A Primary organic solid product, produced by wastewater treatment process that can be beneficially recycled. It replaces the word "Sludge" |
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Another word for "Anaerobic" is |
Septic |
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H2S is |
Hydrogen Sulfide |
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How much does a gallon of water weight? |
8.34 lbs |
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What is the approximate weight of 50,0000 gallons of wastewater? A. 41,000 lbs B. 71,000 lbs C. 88,000 lbs D. 417,000 lbs |
D. 417,000 lbs 50,000 gallons X 8.34 = 417,000 lbs |
multiply times by the weight of one gallon |
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What is "BOD"? |
Biochemical Oxygen Demand |
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What information must be on a warning tag attached to a switch that has been locked out? |
Signature of the person who locked out the switch and who is the only person authorized to remove the tag. |
Lock out Tag out Procedure |
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The minimum scouring velocity normally used for sanitary collection line is? |
2 ft/sec |
feet per second |
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How many CEU's are needed to renew a Grade 1 wastewater certificate every two years? |
1 CEU |
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How many CEU's are needed to renew a Grade 3 wastewater certificate every 2 years? |
2 CEU's |
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What is "TSS"? |
Total Suspended Solids |
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What does "NPDES" Stand for? |
National Pollutant Discharge Elimination System |
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What is the most common method/means of preserving a wastewater sample that cannot be analyzed immediately? |
Keep it below 6 degrees Celsius but do not allow to freeze <6 degrees Celsius |
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pH samples must be analyzed |
Immediately |
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What temperature should a BOD incubator be maintained at when incubating BOD samples? |
20 degrees Celsius +/- 1 degree Celsius |
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what temperature holds more Dissolved Oxygen |
10 degrees F water holds more |
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Facultative ponds are? |
Mechanically aerated ponds |
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Under ice & snow cover. the BOD level in ponds will? |
Decrease slowly |
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