Tag: I-Practice

The controls for a pump are set for the pump to turn on when the pressure drops to 2 psi and to turn off when the pressure reaches 8 psi.  If this tank has a diameter of 50 feet, how many gallons will be stored between pumping cycles? The controls for a pump are set… Continue reading More Math Problems & Charts

The controls for a pump are set for the pump to turn on when the pressure drops to 2 psi and to turn off when the pressure reaches 8 psi.  If this tank has a diameter of 50 feet, how many gallons will be stored between pumping cycles? The controls for a pump are set… Continue reading More Math Problems & Charts

The purpose of the USEPA Ground Water Rule is to reduce disease incidence associated with disease-causing microorganisms in A.  Drinking waterB.  Non-point sourcesC.  Storm waterD.  Wastewater Source:  USEPA Ground Water Rule, http://www.epa.gov/safewater/disinfection/gwr/regulation.html The USEPA Ground Water Rule becomes effective on A. December 1, 2009 B. July 1, 2010 C. December 1, 2010 D. July 1,… Continue reading More Distribution Questions

You are adding 6 lbs/day of chlorine gas to a flow of 277 gpm and your total chlorine residual is 1.5 mg/L. What is your chlorine demand in mg/L? Click on the thumbnail below for a chart of pump station math for cylindrical tanks and have some fun!!! Click on the thumbnail below for a… Continue reading More Distribution Math Problems & Charts

You are adding 6 lbs/day of chlorine gas to a flow of 277 gpm and your total chlorine residual is 1.5 mg/L. What is your chlorine demand in mg/L? Click on the thumbnail below for a chart of pump station math for cylindrical tanks and have some fun!!! Click on the thumbnail below for a… Continue reading More Distribution Math Problems & Charts

Which of the following terms refers to groundwater seeping into a sanitary sewer? Exfiltration Filtration Infiltration Inflow Hydrogen sulfide gas is most likely found in a collection system with a low pH or high pH? Chlorine ton cylinders at room temperature will deliver gas at a maximum rate of       150 lb cylinders        Ton Containers… Continue reading More Collection Questions

mg/L x 8.34 x MGD is the formula for calculating A. Chlorine demand B. lbs C. lbs/day D. Volume of a cylindrical tank Click on the thumbnail below for a chart of pump station math for cylindrical tanks and have some fun!!! Click on the thumbnail below for a chart of pump station math for… Continue reading More Collection Math Problems & Charts

mg/L x 8.34 x MGD is the formula for calculating A. Chlorine demand B. lbs C. lbs/day D. Volume of a cylindrical tank Click on the thumbnail below for a chart of pump station math for cylindrical tanks and have some fun!!! Click on the thumbnail below for a chart of pump station math for… Continue reading More Collection Math Problems & Charts

If a lime softening plant using a recarbonation process, where does this process occur?  Before or after lime softening?  Why is recarbonation used?  How is recarbonation accomplished? Show the overall softening chemical equation for calcium bicarbonate removal using lime Show the chemical equation for carbon dioxide dissolving into water In lime softening, which of the… Continue reading More Water Treatment Questions

What is the Langlier Index if the pHA is 9.2 and the pHS is 8.6?  Is this stable, depositing or corrosive? If the P alkalinity is 0 mg/L and the T alkalinity is 100 mg/L, calculate the following: Bicarbonate alkalinity Carbonate alkalinity Hydroxide alkalinity If the P alkalinity is 35 mg/L and the T alkalinity… Continue reading More Water Math Problems & Charts