Distribution Math Practice 2

A pump discharge pressure indicates 60 psi. Find the discharge head in feet.

Calculate the chlorine demand in ppm when the applied chlorine dosage is 3.0 mg/L and the chlorine residual is 2.5 mg/L

Find the total gallons of water pumped from a well over a 400 minute period, when the discharge rate is 1200 gpm through an 8 inch diameter pipe.

Find the total force in pounds exerted against a 10-inch diameter gate closed, when the up-stream line pressure is 110 psi?

Find the pounds of 65% HTH required to disinfect a 12 inch diameter main 1000 feet long at a chlorine dose of 25 ppm? Find the pounds of HTH required.

Approximately how long could you provide water in hours and minutes, from a full reservoir measuring 32 feet high and 60 feet in diameter with a demand of 1800 gpm?

Approximately how long would it take to empty a reservoir through a 8 inch outlet flowing at a constant rate of 2 cfs, if the cylinderical tank has a height of 28 feet and a radius of 28 feet.

Find the volume of water in acre feet contained in an 80 foot radius storage tank with a pressure transducer indicating 20 psi at the base of the tank?

At 8:00 am a pressure transducer used to measure water level indicates 12 psi for a 100 foot diameter water storage tank, at 6:00 pm the pressure transducer indicates 4 psi. Determine the gallons of water used during the 10 hour period.

Find the Total Dynamic Head of a pump that has a suction lift of 165 feet and a discharge pressure of 98 psi.

How many pounds per day are required to disinfect a flow of 5 MGD at a dose rate of 2.25 parts per million?

If 155 pounds per day of chlorine gas are required to disinfect a treatment plant at a dose rate of 1.25 ppm. What is the average flow in gallons per minute of the plant?

Find the gallons per day of 12.5% sodium hypochlorite sp. Gr. 1.24 required to disinfect a well when the discharge flow is 800 gpm and the applied chlorine dose is 3.0 ppm?

A well operates at a rate of 1.5 cfs and for an average of 20 hours per day. The well is disinfected using chlorine gas at a rate of 0.75 ppm. Chlorine gas costs $1.07 per pound. What is the monthly chlorine cost to operate the well?

Determine the TDH for a well using the following data: discharge flow 2,200 gpm, static level 220 feet, pumpling level 305 feet, discharge pressure 103 psi. Also find the draw-down and specific yield or capacity?

A water storage tank is 35 feet tall with a 180 foot diameter. The water level transducer is sending out a 16mA signal. How many gallons are in the tank?

A water production facility produces an average of 20-acre feet of water per day. The chlorine dose rate is 0.75 mg/L. What is the cost to chlorinate over a 30 day period if the facility is using 12.5% sodium hypochlorite with a specific gravity of 1.22 and the cost is $2.30 per gallon?

Find the motor horsepower if the pump is flowing at 1850 gpm at a discharge pressure of 80 psi. The pump efficiency is 82% and the motor efficiency is 76%.

Your system operates 6 wells, each operating at 1250 gpm. The system demand requires 15 MGD. Calculate the cost to purchase additional water to meet the current water demands of 15 MGD when the purchase water costs $425/AF

How many pounds of calcium hypochlorite 65% are required to disinfect a well that is to be put back in service at a dose of 50 ppm. The well casing is 18 inches in diameter and a total of 700 feet deep and the water static water level is 425 feet, disinfect the portion of the well casing that is submerged under water.