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Seat No.: Enrolment No.:
GUJARAT TECHNOLOGICAL UNIVERSITY
BPLAN SEMESTER • EXAMINATION WINTER 2016
Subject Code: 1055502 Date:22/10/2016
Subject Name: Planning and Management of Utility Services
Time:10:30 AM to 12:30 PM Total Marks: 50
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Section-I Theory 35
Q-1

Expand the abbreviations:
CPHEEO
GIS
2
What is water shed? 1
Convert Units:
1 hectare equals to how many acres?
1 acre equals to how many Sqm?
1 cum equals to how many cft?
1/4 day equals to how many seconds?
4
What are the two methods are generally employed for calculating the quality of storm
water?
1
What will be value of "a" and "b" if duration storm is 1212 seconds? 2
Q-2 Write a short note on Hydrological cycle 5
Q-3 Provide illustrative diagram for storm water. List out the general assumptions to be
considered while designing storm water system
5
Q-4 For water supply scheme answer the following:
Provide purpose of pumps.
List out the type of pumps
List out the factors governs the choice of pumps.
5
or
List the type of methods in water distribution. Explain Gravity and pumping systems
Combined in detail.
Q-5 Procedure of laying the water supply line 5
or
Provide short note on Air Valves Bib Cocks
Q-6 What is Municipal solid waste? Explain components of municipal solid waste in detail. 5
or
2
List various categories of waste water treatment. Explain any one in detail.
Section-II Sums 15
Q-7 A township (total area 250 Acres) consist of various surfaces as follow:
Type of surface Area
Area with many building 35
Pavement of Asphalt 30
Area with few building 1 5
Garden 10
Open Spaces 1 0
Impermeability factors for above areas are 0.72, 0.87, 0.13, 0.09 0.23 respectively.
Find out average runoff coefficient for whole area.
5
or
Workout the ratio of D.W.F. and W.W.F. of a town having the following particulars:
Area:2000 hectares
Water Supply rate: 175 LPCD
Population Density: 250 persons per hectares
Duration of storm:21 minutes
Average runoff coefficient:0.7
Assume that 55% of water supplies reaches the sewer.
Q-8 A city having catchment area of 35000 hectares and population density of 345 persons
per hectare is supplied with water at the rate of 220 litres per capita per day. The
intensity of rainfall is 30 mm/hour and average runoff coefficient is 0.73. If 75% of
water supplied contributes to the sewage, determine the designed flow for combined
sewer. Assume peak discharge factor 1.75.
5
or
A town having population of 0.02 million has sewage of D.W.F. 35 liters per second
having average B.O.D. of 600 mg per 2.5 liters. The sewage contains industrial waste to
the extent of 2.5 liters per second having total BOD of 240 kg per day. Find out the per
capita B.O.D. load in kg per day.
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Q-9 A township of 500 acres. The rainfalls on the surface having the following distribution
and runoff coefficient:
Type of surface Area Runoff coefficient
Roofs 25 0.90
Pavement of yards 15 0.80
Lawns Gardens 30 0.15
Macadamized roads 15 0.40
Vacant Plots 15 0.10
Calculate the average Impermeable factor for the whole area.
Calculate the intensity of rain with rational method if the duration of the storm is
25 minutes.
Calculate the total quantity of storm water for whole day that will reach the
sewer lines by rational method.
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