[PA] QB 01 | BEP 05

From numbers 0-61, what is the sum of all odd integers?

A centrifugal pump delivers 1890 Liters per minute against a head of 300 feet with a combined pump and motor efficiency of 70%. What is the cost of the electrical power required to operate the pump 12 hours per day for 2 months? Assume each month has 31 days. The electrical cost is $0.06 per kWh.

A wet well is 12 feet by 6 feet by 15 deep and the influent rate is 600 GPM. With the 2 pumps running, the level decreases 3’9”. In 18 minutes. If pump “A” has a pumping rate of 425 GPM, what is the pumping rate of pump “B”?

A ball is dropped into a manhole, 2 min. 18 seconds later it is observed 500′ away in a downstream manhole. What is the velocity of the flow in FPS?

How many gallons are there in a pipe that is 18 in. in diameter and 216 ft long?

Two columns of water are filled completely at sea level to a height of 88 ft. Column A is 0.5 in. in diameter. Column B is 5 in. in diameter. What will the two pressure gauges, each attached to the bottom of each column, read?

A crew surveys a sewer from STA. 11 + 3.00 to STA. 23 + 58.35. If the elevation of the manhole farthest to the treatment plant is 665.3 feet, what is the elevation of the second manhole if the grade is 0.0011 ft/ft?

What is the area of a trench that is 22.4 ft long and 3.3 ft wide?

A chemical was dosed at 31 mg/L to treat a flow of 7,525,000 gpd. The chemical cost is $1.37 per pound. A jar test determined that a dose of 17 mg/L would achieve the same level of treatment. How much money could be saved each month by switching to the lower dose? Assume a month has 30 days.

A meter indicates water flowing from a fire hydrant at 2.6 cfm. How many gallons will flow from the hydrant if it is flushed for 35 minutes?

What capacity blower is required to ventilate a manhole 60” in diameter and 53′ deep, if 23 air change(s) are required every 36 minutes?

A wet well is 9 feet deep by 21 feet in diameter. When the pump is not running, the water rises 33 inches in 2 minutes and 52 seconds. If the level falls 5.2 inches in 14 minutes while the pump is running, what is the pump rate in gpm?

Root control chemical is added to the sewer at a dose of 51 mg/L. The sewer is 54-inches in diameter and 2,127 feet long. If the chemical contains 41% active ingredient, how many pounds of the chemical solution must be added to the sewer?

A sewer jet with a 1475 gallon tank has an 80 gpm pump. If the operator has to fill the truck 5 times in an 8 hour day, how much time is actually spent cleaning sewers during the day?

A 480v AC pump motor draws 22 amps. What is the horsepower output of the motor if the power factor is 0.78 and the pump efficiency is 89%?

If a pump outputs 625 gpm against a total dynamic head of 211 feet and the pump is 71% efficient, what is the brake HP? Assume the fluid being pumped has a specific gravity of 1.12.

A 2.50-mil gal storage-tank needs to be disinfected with a 62.5% calcium hypochlorite solution. If the chlorine dosage desired is 50.0 mg/L, how many gallons of calcium hypochlorite solution are required?

A small tank containing 1,500 gal of water needs to be disinfected in order to be put back in service. If the dosage needed is 35 mg/L, how many pounds of calcium hypochlorite (60.5% available chlorine) are required?

A contractor is building a house with a basement elevation of 884.6 ft. The stub-out connection elevation is 876.5 ft. If the minimum allowable slope is 3/8 inch per foot, how far from the road can the builder place the house?

What is the pressure head at a fire hydrant in feet, if the pressure gauge reads 121 psi?

A four cylinder positive displacement pump has a cylinder bore of 4.5 inches with a stroke of 5.5 inches. The pump operates at 1,700 rpm. How long will it take to empty a 72-inch diameter wet well, 33.0 ft deep if it has an inflow of 2,500 gpm?

How many gallons of 6.00% sodium hypochlorite solution are needed to disinfect a 1.0-ft diameter pipeline that is 752 ft long. The required dosage is 25.0 mg/L.

Find the total head, in feet, for pump with a total static head of 19 ft ad a head loss of 3.7 ft.

A certain town’s household flow rate is measured at 85 GPCD. If the plant receives 3.0 MGD, but 15% of that is inflow and infiltration, then what is population of the town?

An 11 foot wide by 2,650 foot long trench must be excavated and the spoils removed from the premises. The spoil weighs 3600 lbs per cubic yard and each truck can carry 11 tons. How many truck loads are required if the trench is 14 feet deep?

If the grade of a sanitary sewer has a slope of 0.10% for 1,200 feet, what is the rise of the pipe?

What is the percent lime in a slurry, if 12 lb of lime are mixed in a 55-gal drum that contains 52 gal of water?

Rain falls for two hours on a parking lot that is 205 feet by 185 feet. The amount of rain that fell was measured at 2.5 inches. Calculate the amount of flow in gpm.

A trench is 430 ft long, 4.0 ft wide, and 5.5 ft deep. How many cubic yards of soil are excavated?

A water treatment plant injects chlorine at a dosage rate of 3.00 mg/L after the filters. The chiding residual is 1.45 mg/L at a distant point in the distribution system. Calculate the chlorine demand between the two sampling points.

A well produces 365 gpm with a drawdown of 22.5 ft. What is the specific yield in gallons per minute per foot?

If a 24” pipe and a 48″ pipe are running full and meet at a manhole, what size outlet pipe will be required?

Your department uses 80 units of an item per week. You are required to maintain a 10-week reserve of this item at all times and it requires 4 weeks to obtain a new supply. What is the minimum reorder point?

The interior of 200 feet of a 10-inch diameter pipe is uniformly coated with a 1-inch thick layer of grease. Approximately how much will this pipe hold when filled with water?

The interior of 750 ft of 24 in. pipe is uniformly coated with 1.5 inches of grease. How many gallons will this pipe hold when filled with water?

Given the following data, determine the detention time in hours. Distribution pipe from water plant to storage tank is 2,485 ft in length and 12-in, in diameter storage tank averages 1,875,000 gal of water at any given time flow through system is 6.82 mgd.

A degreasing agent is added to a 11.5 foot diameter wet well that is 9.5 feet deep. 4.5 pounds of degreasing agent is required for every square foot of surface area. If the degreaser weighs 3.5 pounds per gallon and has a concentration of 16.4 mg/L, how many pounds of chemical must be added to the well?

A truck starts from rest and moves with constant acceleration of 5 m/s². What is its distance traveled after 4 seconds has elapsed?

If you borrowed money from your friend with a simple interest of 12%, find the present worth of Php 50,000 which is due at the end of 7 months.

What is the corresponding effective rate of 18% compound semi-quarterly?

What would the wire to water efficiency be on a pump that had water power of 16 kW and motor power of 21 kW?

Water is draining at a rate of 0.3 m/hr from a reservoir that is 4.6 m high, 7.6 wide and 7.6 m long. How many liters of water are flowing out of the tank in that 1-hour?

If a pipe has a 300 mm diameter, what is the velocity of the water if the pipe is carrying 0.090 m³/sec?

If a pump discharges 10,350 L in 3 hours and 45 minutes, how may liters per minute is the dump discharging?

An empty atmospheric storage tank has a volume of 31.4 m³. How long will it take to fill 60% of the tank volume if a pump is discharging 2 constant 60 liters per minute into the tank?

Find the velocity of water in a channel if it takes 22 minutes for water to travel a distance of 504 m in the pipe.

A channel 2.1 m wide has a water flowing through it at a depth of 0.9 m and a velocity of 1.3 m/s. Find the flow through the channel in cu. m/s

How many kg of 90% available chlorine are necessary to provide 6.0 kg of chlorine?

The pressure gauge at the bottom of a tank is 300 kPa. What is the depth of water in the tank?

Find the motor power for a pump station with the following parameters: Motor Efficiency: 92% ; Pump Efficiency: 79% ; Total Head: 52 m ; Flow: 7 MLD