ECS II - Final Review Packet 2025 With Correct Answers

ECS II - Final Review Packet 2025 With
Correct Answers




A new hospital wing is in the programming phase. A total of 25 beds will be added in the new building wing
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including a new laundry facility. The design team will need to determine if the existing sewer line is large
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enough accommodate the additional sewage flow. Using the flow rate estimates below, determine the
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sewage quantity in gallons per hour that must be factored into the new design.
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●Hospitals 250 gal per bed per day o o o o o o




●Hospital Kitchens 25 gal per bed per day o o o o o o o




●Hospital Laundry 40 gal per bed per day - correct answer 1. Find gal/bed/day - 250 (hospitals) + 40 (laundry) =
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290 gal/bed/day o




2. Find total gal/day - bed * gal/bed/day = 25*290 = 7,250 gal/day
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3. Convert to gal/hr - gal/day / 24 = 7,250/24 = 302.08 gal/hr
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An urban site developer is interested in implementing natural site drainage strategies due to periodic flooding
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caused by large areas of existing impervious cover. Porous pavement has been identified as a possible option
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for sidewalk and driveway areas. The site is located Duluth, Minnesota (Climate Zone 7 "Very Cold"). Which of
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the following options would be the most appropriate for this site?
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, a) Porous asphalt
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b) Porous concrete
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c) Open-celled pavers - correct answer Porous Asphalt
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What level of water quality is acceptable by building codes for flush fixtures (toilets and urinals)?
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a) Potable water
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b) Gray water
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c) Black water - correct answer Gray Water
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A municipal sewage treatment facility uses a multi-stage process for its water filtration. After the
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sedimentation stage of filtration, it is observed that suspended particles are not being captured and
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accumulating on the bottom of the tank. Which of the following factors is likely causing the particles to bypass
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the filtration process?
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a) Water pressure
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b) Water temperature
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c) Water velocity - correct answer Water Velocity - slow flow of water is desired for particulate accumulation at
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the bottom of the filter. Higher velocity prevents the sedimentation from settling.
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A mid-rise building is in design development and the plumbing design will use upfeed distribution. The
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basement level will include pumps and pressurized tanks to overcome the static head pressure and deliver
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water to the top floor fixtures at 75 feet above ground level. In addition, the street main water pressure is less
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than desirable at 25 psi - an ideal water pressure at plumbing fixtures is 50 psi. Using the formula below,
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