| # | pie x diameter of a tank is what? | Area of the ends of the tank | Area of the sides of the tank | The circumference of the tank | the valume of the tank | none of the above | 3
|
|---|
| 1 | A cylinder tank is 10 feet in diameter and 20 feet in height. What is the approximate capacity in liters? | 44,450 | 31,030 | 5,942 | 4,445 | none of the above. | 1 |
| 2 | If water weighs 8.34 pounds per gallon, how much will seven and one-half gallons weigh? | 50 pounds. | 62.5 pounds. | 75.6 pounds. | 77 pounds. | none of the above. | 2 |
| 3 | One milliliter is what fraction of a liter? | 1/10 | 1/100 | 1/1,000 | 1/100,000 | none of the above. | 3 |
| 4 | A pump can deliver 400 gallons per minute at a total head of 184.8 feet. What is the pressure equivalent to this head, expressed in pounds per square inch (psi)? | 42.7 PSI. | 80 PSI. | 427 PSI. | None of the above. | | 2 |
| 5 | How many gallons of wastewater would 600 feet of 6-inch pipe hold, approximately? | 740 | 880 | 900 | 930 | none of the above. | 2 |
| 6 | Assume a community of 1,100 people has a lagoon. The flow averages 80,000 gallons per day. The flow is | 14 gallons per capita. | 72 gallons per capita. | 80 gallons per capita. | 140 gallons per capita. | none of the above. | 2 |
| 7 | A truck is driven 115 miles and uses 9.7 gallons of gas. How many miles per gallon does the truck average? | 9.2 miles per gallon. | 11.8 miles per gallon. | 17.6 miles per gallon. | 20 miles per gallon. | none of the above. | 2 |
| 8 | A single-piston reciprocating pump has a 6-inch diameter piston with a 6-inch length of stroke. If it makes 16 discharge strokes per minute, the pumping rate is _____ gallons per | 6. | 12 | 25 | 47. | none of the above. | 2 |
| 9 | Calculate the weir loading for a sedimentation tank that has an outlet weir 480 ft. long and a flow of 5 mgd. | 9220 GPD/FT. | 9600 GPD/FT. | 9920 GPD/FT. | 10,420 GPD/FT | none of the above. | 4 |
| 10 | A settling basin has a length of 60 ft., width of 20 ft., and depth of 12 ft. at a flow rate of 60 mgd, what is the retention time of this basin? | 15 minutes. | 30 minutes. | 1.1 hours. | 2.3 hours. | none of the above. | 3 |
| 11 | How many pounds of chlorine will be used in one day if the flow is 700,000 gpd and a uniform dose of 1.2 mg/l is applied? | 7 lbs. | 15 lbs. | 22 lbs. | 26 lbs. | none of the above. | 1 |
| 12 | How many cubic meters per second in 10 mgd? | 0.44. | 1.44. | 4.73. | 24.62. | none of the above. | 1 |
| 13 | An upright circular cylinder tank (flat bottom) has a diameter of 12 feet. When filled to a depth of 8 feet, the volume is | 226.2 cubic ft. | 904.8 cubic ft. | 3619 cubic ft. | 5000 cubic ft. | none of the above. | 2 |
| 14 | A centrifugal pump is pumping 200 gpm against 40-foot total pumping head. The output power of the pump is about ________ horsepower. | .05. | 2. | 15. | 121. | none of the above. | 2 |
| 15 | A 42-inch diameter pipe is flowing at a rate of 6.5 feet per second. What is the flow in cubic feet per second? | 17.86 | 35.71 | 62.50 | 521.25 | none of the above. | 3 |
| 16 | A 240 gpm mixed media filter filters at a rate of 2 gpm/sq.ft. is back-washed at an average of 24 inch vertical rise for 3 minutes. How many gallons of wash water was used? | 5000. | 5400. | 6000. | 6200. | none of the above. | 2 |
| 17 | Calculate the percent volatile solids. 100 ml of sample - crucible wt. = 19.9850 gr. - crucible + dry slds = 20.0503 gr - crucible + ash = 20.0068 gr. | 33%. | 50%. | 67%. | 74% | none of the above. | 3 |
| 18 | If the sewer rate is $5.50 for the first 500 cubic feet & all consumption over the minimum is billed at the rate of 25 cents per 100 cubic feet, how much would a customer using 1,200 cubic feet be billed? | $5.25. | $6.25. | $6.75. | $7.25. | none of the above. | 4 |
| 19 | At what rate in gallons per minute must wash water be delivered to a mixed media filter to attain a backwash rate of 24 inch vertical rise if the filter is 20 feet wide and 30 feet long? | 600. | 2,400. | 3,000. | 9,000. | none of the above. | 4 |
| 20 | If chlorine costs 15 cents per pound, what is the daily cost to chlorinate 5 mgd of wastewater to an initial concentration of 2.6 mg/l? | $1.95. | $3.25. | $10.84. | $16.25. | none of the above. | 4
|
