Principles of Foundation Engineering, SI Edition
8th Edition
ISBN: 9781305446298
Author: Braja M. Das
Publisher: Cengage Learning US
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2. Design a storage and distribution system for the town of Waffle. The requirements are that fire protection
shall be provided, the minimum water pressure at the top of the apartments is to be 240 kPa and the
maximum system pressure is to be 550 kPa. The following assumptions may be used: Each of the four
apartment buildings is occupied by 50 residents. Each apartment building is four stories high. Each story is 3
meters high. Each house is occupied by three residents. Average daily demand for the village is 500 Lpcd and
the peak hourly demand factor is 6.2. Needed fire flow for the houses is 230 m3/h. and for apartment
building is 500 m3/h, with 2 h duration. System pressure is to be provided from the elevated storage tank.
Minor pressure losses in buildings may be ignored. The distribution system will not contain any loops. Assume
that emergency supply (ES), fire department supply (FDS) or off peak pumping are not provided (they are all
equal to zero). Provide the following…
1. The city of Ten Sleep proposes to use Crater Lake for its water supply. Water quality analysis results revealed
no detectable Giardia, viruses, or Cryptosporidium in the source water (Giardia cysts <1/100 L; Viruses
<1/100 L; Cryptosporidium oocysts <0.075/L). Design a disinfection system to treat 3,500 m³/d by direct
filtration and chlorine dioxide (CIO2) will be used as a primary disinfectant. The filtered water has a pH of 7.5
and a temperature of 5°C. Provide the following information for your design:
• Determine the total removal/inactivation required for disinfection for each pathogen group
• Determine the required CT value to achieve the required inactivation for the design conditions (pH,
temperature)
For the beam shown, where is the peak value of the bending moment diagram?
P
a. Above C
b. Below B
c. Above A
d. Above B
B
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