WorksheetsPART 1: WATER SUPPLY ENGINEERING - Lecture 1: Introduction
Total questions: 100
Worksheet time: 50mins
What is Sanitary Engineering?
The branch of civil engineering associated with the supply of water, disposal of sewage, other public health services and the management of water and sewage in civil engineering.
A branch of civil engineering focused only on building bridges and roads.
A field of engineering that deals exclusively with electrical systems in buildings.
A discipline concerned with the design of mechanical parts for vehicles.
Who is a Sanitary Engineer?
An expert or specialist in the branch of civil engineering associated with the supply of water, collect and disposal of sewage, and other public health services.
A professional who designs electrical circuits for buildings.
A specialist in the construction of roads and highways.
An engineer responsible for the maintenance of mechanical equipment.
What is one of the main works of sanitary engineering as described in the passage?
ensuring an adequate supply of safe water and prompt removal of wastes.
designing electrical circuits for buildings.
constructing bridges and highways.
developing software for water management.
EPA stands for:
Environmental Protection Agency
Energy Production Association
Economic Policy Administration
Environmental Planning Authority
NPSES stands for:
National Pollutional Discharge Elimination System
National Public Safety Emergency Service
National Pollutional Safety Evaluation System
National Public Service Examination System
FWPCA stands for:
Federal Water Pollution Control Administration
Federal Wildlife Protection and Conservation Act
Fresh Water Pollution Control Agency
Federal Waste Processing and Control Authority
USPHS stands for:
U.S. Public Health Service
United States Postal Health Service
Universal Society for Public Health Studies
Union of State Public Health Services
What is the first step in the water treatment process?
Filtration
Screening
Raw Water
Disinfection
Refer to the diagram of the water treatment plant process. Which step comes immediately after Screening?
Filtration
Primary Sedimentation
Disinfection
Coagulation/Flocculation
Refer to the diagram of the water treatment plant process. After Primary Sedimentation, the next step is _________?
Coagulation/Flocculation
Disinfection
Filtration
Chlorination
Refer to the diagram of the water treatment plant process. Which of the following is NOT a step shown in the water treatment process?
Screening
Disinfection
Aeration
Filtration
The purpose of Disinfection in the water treatment process is:
To remove harmful microorganisms from water
To add minerals to water
To improve the taste of water
To filter out large particles
Which step comes immediately before Filtration?
Screening
Secondary Sedimentation
Disinfection
Raw Water
Refer to the diagram of the water treatment plant process. After Filtration, water is supplied to _________?
Disinfection
Sedimentation
Aeration
Storage
Refer to the diagram of the conventional water treatment plant. What is the first step in the water treatment process?
Rapid mix
Screening
Sedimentation
Disinfection
How long does the rapid mix process take?
60 seconds
10 seconds
5 minutes
2 hours
Refer to the diagram of the conventional water treatment plant. What is added during the rapid mix process?
Disinfectant
Coagulant
Sludge
Filter wash
What is the detention time for the sedimentation process?
30 minutes
10 minutes
2 hours
5 hours
What is the filtration rate in the rapid filtration step?
30 m³/m²d
150 m³/m²
60 s
30 min
What is the purpose of the disinfection step?
To add disinfectant and make the water safe for supply.
To remove large debris from the water.
To increase the temperature of the water.
To add minerals to the water.
What happens to the sludge produced during the process?
It is filtered
It is reclaimed as water
It is disposed of
It is used as disinfectant
What type of network is represented by the diagram on the left?
Grid network
Branched (tree) network
Circular network
Radial network
What type of network is represented by the diagram on the right?
Grid network
Branched (tree) network
Circular network
Radial network
One advantage of a grid network over a branched (tree) network is:
It provides multiple paths for data to travel, increasing reliability.
It is less expensive to install than a grid network.
It has fewer connections, making it easier to manage.
It is more prone to single point failures.
Which branch is located on the left side of the network?
East Branch
West Branch
Downstream
New building
Refer to the diagram of the Sewage Collection Network. The new building is located near the _______.
Downstream
Upstream
Central Pumping Station
Main Road
The East Branch is on the right side of the network.
True
False
What is the first stage in the treatment of domestic wastewater?
Preliminary Treatment
Secondary Treatment
Tertiary Treatment
Disinfection
Which stage comes after Preliminary Treatment?
Primary Treatment
Final Treatment
Disinfection
Screening
What is the stage before Disposal in Water Bodies?
Tertiary or Advanced Treatment
Primary Treatment
Secondary Treatment
Screening
Refer to the diagram of the Wastewater Treatment Plant process. Which of the following is NOT a stage in the process?
Preliminary Treatment
Secondary or Biological Treatment
Filtration
Tertiary or Advanced Treatment
True or False: Primary Treatment comes after Secondary or Biological Treatment.
True
False
Refer to the diagram of the conventional sewage treatment plant. What is the first step in the treatment process?
Aerobic oxidation
Screening
Primary sedimentation
Sludge drying
What is the area required for sludge drying per person?
0.5 m²
0.25 m²
1 m²
2 m²
The primary sedimentation process operates at ______ m³/m² d at 3 d.w.f.
30
15
45
60
Refer to the diagram of the conventional sewage treatment plant. Which process is responsible for removing grit?
Screening
Aerobic oxidation
Grit removal
Sludge drying
What does AS stand for?
Activated Sludge
Aerated Sediment
Anaerobic Sludge
Aerobic Solution
The secondary sedimentation process operates at ______ m³/m² d at 3 d.w.f.
40
25
60
80
In the design of any waterworks project, it is necessary to estimate the amount of water that is required. This involves determining the number of people who will be served and their per capita water consumption. What is the formula for water consumption in liters per capita per day? Water consumption (L/(Cap.day)) = ______ / Total number of people in the city (Capita)
Total daily water consumption (L/day)
Total daily consumption averaged over one year (L/day)
Quantity required in 12 months (L/day)
What is the formula for average daily consumption in liters per capita per day? Average daily consumption (L/(Cap.day)) = ______ / Total population in the city (Capita)
Total daily water consumption (L/day)
Total daily consumption averaged over one year (L/day)
Quantity required in 12 months (L/day)
What is the formula for average daily per capita demand? Average daily per capita demand (L/(Cap.day)) = Quantity Required in 12 Months (L/day) / (________ x Population (Capita))
360
365
30
Domestic or Residential use accounts for what percentage of the total water demand?
10-15%
25-30%
40-60%
Industrial use accounts for what percentage of the total water demand?
5-10%
25-30%
40-60%
Commercial use accounts for what percentage of the total water demand?
10-15%
25-30%
40-60%
Public use accounts for what percentage of the total water demand?
5-10%
10-15%
25-30%
The water demand rate for a hospital is ______ L/bed/d.
950 L/bed/d
500 L/bed/d
1200 L/bed/d
750 L/bed/d
The water demand rate for a school is ______ L/student/d.
76 L/student/d
50 L/student/d
100 L/student/d
120 L/student/d
The water demand rate for a restaurant is ______ L/customer/d.
30 L/customer/d
10 L/customer/d
50 L/customer/d
100 L/customer/d
The water demand rate for a shopping center is ______ L/m² floor area/d.
6 L/m² floor area/d
3 L/m² floor area/d
10 L/m² floor area/d
15 L/m² floor area/d
The water demand rate for a factory is ______ L/employee/d.
100 L/employee/d
50 L/employee/d
200 L/employee/d
500 L/employee/d
According to the table, what is the typical water demand for the Dairy industry in m³/metric ton?
2-3
8-10
15-25
200-800
Which type of industry has the highest range of water demand according to the table?
Dairy
Chemicals
Paper
Petroleum
The Symons formula for industrial water demand is ______ m³/10³ m² floor area per day.
12.2
8.5
15.0
10.0
What is the average water demand (L/c.d) for domestic consumption according to the summary table?
50-75
190-340
200
250-350
Which type of consumption is associated with water use in city halls, jails, and schools?
Domestic
Commercial and industrial
Public
Loss and waste
The percentage of total water demand for loss and waste is ______%.
10
25
5
15
Which of the following is NOT a purpose of domestic water consumption?
Drinking
Flushing streets
Washing
Bathing
What is the effect of the size of the city on per capita water demand?
Per capita demand for big cities is generally large as compared to that for smaller towns.
Per capita demand for big cities is generally smaller as compared to that for smaller towns.
Per capita demand for big cities and smaller towns is always the same.
Per capita demand for big cities is unpredictable compared to smaller towns.
Name one factor related to economic activity that affects water consumption.
Presence of industries and commerce.
Amount of rainfall in the region.
Type of soil present.
Distance from the sea.
If water is aesthetically and medically safe, how does it affect consumption?
Consumption will increase as people will not depend on private wells, etc.
Consumption will decrease due to lack of trust.
Consumption will remain unchanged regardless of safety.
Consumption will shift to bottled water only.
What is the impact of water cost on consumption?
Higher cost of water generally reduces consumption.
Higher cost of water generally increases consumption.
Water cost has no impact on consumption.
Lower cost of water generally reduces consumption.
How does pressure in the water distribution system affect water consumption?
Higher pressure can increase water consumption.
Higher pressure can decrease water consumption.
Pressure has no effect on water consumption.
Lower pressure can increase water consumption.
Name a climatic condition that can affect water consumption.
Hot climate increases water consumption.
Cold climate decreases water consumption.
Rainy climate reduces water consumption.
Windy climate has no effect on water consumption.
How do habits of people and their economic status affect water consumption?
People with higher economic status and different habits may consume more water.
Economic status and habits have no effect on water consumption.
Only habits affect water consumption, not economic status.
Water consumption is always the same regardless of habits or economic status.
What is one method of charging for water that affects consumption?
Water tax charged on the basis of meter reading or fixed monthly rate.
Water supplied free of cost to all households.
Charging a flat rate regardless of usage.
Providing water subsidies for all consumers.
How does efficiency of waterworks administration affect water consumption?
Leaks and unauthorized use of water can increase consumption.
Efficient administration always reduces water prices.
Water consumption remains unchanged regardless of administration efficiency.
Efficient administration leads to unlimited water supply.
What is annual or yearly variation in water demand?
Annual or yearly variation refers to changes in demand over the year.
Annual variation refers to the total water supply available in a year.
Yearly variation is the difference between rainfall and evaporation.
Annual variation is the amount of water lost due to leakage each year.
What causes seasonal variation in water demand?
Demand peaks during summer due to fire breaks and increased consumption.
Water demand is constant throughout the year.
Seasonal variation is caused by changes in water quality.
Water demand decreases during summer due to lower usage.
What is monthly variation in water demand?
Monthly variation refers to changes in demand from month to month.
Monthly variation refers to changes in demand from hour to hour.
Monthly variation refers to changes in demand from year to year.
Monthly variation refers to changes in demand from day to day.
What is weekly variation in water demand?
Weekly variation refers to changes in demand from week to week.
Weekly variation refers to changes in demand from hour to hour.
Weekly variation refers to changes in demand from season to season.
Weekly variation refers to changes in demand from year to year.
How does daily activity affect daily variation in water demand?
People draw out more water on holidays and festival days, increasing demand.
Daily activity has no effect on water demand.
Water demand decreases on holidays and festival days.
Water demand remains constant throughout the year.
Why are hourly variations in water demand important?
Hourly variations are important due to wide range in demand during active household hours and emergencies like fire breaks.
Hourly variations are important because they help in reducing water pollution.
Hourly variations are important as they increase the cost of water supply.
Hourly variations are important because they ensure water is always cold.
What does the 'max' point represent in terms of water supply?
The 'max' point represents the maximum rate of hourly supply required.
The 'max' point represents the minimum rate of hourly supply required.
The 'max' point represents the average rate of hourly supply required.
The 'max' point represents the total volume of water supplied in a day.
According to the Goodrich formula, what is the percentage of annual average consumption for time t=1 day?
180%
50%
100%
75%
What is the formula for average daily demand in terms of water consumption?
Average daily demand = Average water consumption (L/Cap.day) x No. of population
Average daily demand = Total water consumption / No. of days
Average daily demand = No. of population / Average water consumption (L/Cap.day)
Average daily demand = Average water consumption (L/Cap.day) + No. of population
What is the maximum daily demand in terms of average daily demand?
Maximum daily demand = 1.8 x average daily demand
Maximum daily demand = 1.2 x average daily demand
Maximum daily demand = 2.5 x average daily demand
Maximum daily demand = 0.8 x average daily demand
Which of the following is the rate of water consumption for a high income single family according to the table?
270 L/c/d
310 L/c/d
380 L/c/d
400 L/c/d
In Iraq, what is the assumed average domestic water demand?
400 L/c/d
200 L/c/d
600 L/c/d
1000 L/c/d
Peaks of water consumption in certain areas of a city affect the design of the distribution system by:
requiring larger pipes and storage to meet demand
reducing the need for water treatment
eliminating the need for pressure regulation
allowing for smaller pumps and reservoirs
Which of the following is an outdoor firefighting system using water?
Hydrants
Hose reel
Sprinkler
Which of the following is NOT a limitation for the Insurance Service Office Formula (ISO) for fire demand?
One fire per day
Fire duration 4-10 hr
F = 500-8000 gpm
P = 200 x 10^3 capita
The coefficient C in the Insurance Service Office Formula (ISO) is related to the type of construction material and ranges from ___ to ___.
0.6 to 1.5
1.0 to 2.0
0.3 to 1.0
1.5 to 2.5
According to the National Board of Fire Underwriters (NBFU) formula, what does 'P' represent?
Population in thousand ( 103 )
Pressure in pounds per square inch
Power in kilowatts
Probability of fire occurrence
Which of the following is NOT a use case for fire extinguishers according to the worksheet?
Electrical risk
Flammable liquids
Engineering criteria for location and number of cylinders
State True or False: The total floor area (A) in the Insurance Service Office Formula (ISO) excludes the basement of the building.
True
False
Which formula is used by the American Insurance Association to calculate fire flow requirement?
Q (L/min)= 3182P0.5
Q (L/min)= 4637P0.5(1−0.01P0.5)
Q (L/min)=1136.5(P/5+10)
Q (kilo liters/d)=100 P0.5 for P>50000
The fire flow requirement in general case is ______ gpm and ______ L/min.
8000 gpm and 30240 L/min
5000 gpm and 18900 L/min
10000 gpm and 37850 L/min
6000 gpm and 22710 L/min
According to the Ministry of Urban Development Manual Formula, what is the formula for fire flow requirement for P > 50000?
Q (L/min)=4637 P0.5(1−0.01P0.5)
Q (L/min)= 3182P0.5
Q (L/min)=1136.5(P/5+10)
Q (kilo liters/d)=100 P0.5 for P>50000
The minimum fire flow required is ______ gpm and ______ L/min.
500 gpm and 1890 L/min
750 gpm and 2500 L/min
1000 gpm and 3785 L/min
250 gpm and 950 L/min
For a group of houses with a distance between adjacent units of 31-100 ft (9.5-30.5 m), what is the required fire flow in gpm and L/min?
500 gpm, 1890 L/min
750-1000 gpm, 2835-3780 L/min
1000-1500 gpm, 3780-5670 L/min
1500-2000 gpm, 5670-7560 L/min
For a required fire flow of 2000-2250 gpm (7560-8505 L/min), the duration of flow should be ______ hours.
9 hours
3 hours
6 hours
12 hours
What is the formula for the arithmetic method to estimate the population in the future (Pf)?
Pf = Po + K Δt
Pf = Po × K Δt
Pf = Po - K Δt
Pf = Po / K Δt
Forecasting Population: In the arithmetic method, what does 'K' represent?
Base population
Growth rate
Time increment
Population in the future
What is the formula for the geometric method to estimate the population in the future (Pf)?
ln Pf = ln Po + K* Δt
Pf = Po + K* Δt
Pf=Po∗eK∗Δt
Pf = Po / (1 + K* Δt)
Forecasting Population: In the geometric method, the growth rate is proportional to which of the following?
Base population
Time increment
Population
Growth rate
What is the formula for the third method shown for estimating future population (Pf)?
Pf=Po×(1+i)n
Pf=Po×(1−i)n
Pf = Po + (i × n)
Pf=(1+i)nPo
What is the population density (capita per km²) for closely built-up single-family residential areas with small lots?
8,800-10,000
2,000-3,000
15,000-17,000
500-1,000
What is the population density (capita per km²) for apartment and tenement districts?
2,500-250,000
500-2,000
250,000-500,000
100-500
What is the population density (capita per km²) for commercial districts?
High variable according to development
Always low
Always high
Zero
Constant everywhere
For groundwater sources, what is the recommended design period (in years) for water supply systems?
5
10
15
20
