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WorksheetsD55 MASTER THE DAY
Total questions: 102
Worksheet time: 2hrs 42mins
Name
Class
Date
1.
Which type of sewage includes rainwater collected from streets and roofs?
a)
Industrial sewage
b)
Storm sewage
c)
Sanitary sewage
d)
Septic sewage
2.
Which pipe is specifically used to carry discharge from toilets?
a)
Vent pipe
b)
Subsoil pipe
c)
Soil pipe
d)
Rainwater pipe
3.
What is the primary source of drinking water supply in most cities?
a)
Groundwater
b)
Surface water
c)
Rainwater harvesting
d)
Desalinated water
4.
Which waste is offensive and contains 0.1% solids?
a)
Sludge
b)
Garbage
c)
Sewage
d)
Rubbish
5.
Which item listed below is part of inorganic refuse?
a)
Tree leaves
b)
Mud
c)
Excreta
d)
Fruit peels
6.
Which method of population forecasting assumes a constant rate of increase?
a)
Arithmetic method
b)
Geometric method
c)
Incremental method
d)
Graphical method
7.
Which of the following is a cause of variation in water demand?
a)
Population size
b)
Quality of water
c)
Climate
d)
All of the above
8.
The total water requirement for public use is restricted to what percentage of total demand?
a)
20%
b)
15%
c)
10%
d)
5%
9.
Which part of a sewer cross-section is called the 'crown'?
a)
Bottom-most point
b)
Topmost point
c)
Midpoint
d)
Invert level
10.
What is the name of the component that prevents loss of water seal in plumbing traps?
a)
Air gap
b)
Anti-syphonage pipe
c)
Vent pipe
d)
Backflow valve
11.
Which drainage component is installed for cleaning blockages in sewers?
a)
Gully trap
b)
Cleaning eye
c)
Vent shaft
d)
Soak pit
12.
Which type of sewage is least offensive and comes from kitchens and bathrooms?
a)
Sanitary sewage
b)
Sullage
c)
Combined sewage
d)
Industrial sewage
13.
The cleaning and treatment of sewage must be completed before:
a)
Transportation
b)
Storage
c)
Disposal
d)
Filtration
14.
The invert level of a sewer pipe is the:
a)
Top inner surface
b)
Middle point
c)
Bottom inner surface
d)
Outer surface
15.
What is the average water consumption in a cinema theatre per capita?
a)
30 LPCD
b)
15 LPCD
c)
70 LPCD
d)
45 LPCD
16.
What is the fire demand pressure in a hydrant system as per standard values?
a)
10–12 kg/cm²
b)
2–3 kg/cm²
c)
1–2 kg/cm²
d)
0.5–1 kg/cm²
17.
Statement: Garbage is organic in nature.
Which of the following best supports this statement?
a)
It contains plastic
b)
It includes broken furniture
c)
It includes decayed vegetables
d)
It is entirely non-biodegradable
18.
What type of sewer system carries both sanitary and storm sewage together?
a)
Separate system
b)
Combined system
c)
Parallel system
d)
Cyclic system
19.
Which of the following is an example of dry combustible refuse?
a)
Broken glass
b)
Cow dung
c)
Metal scrap
d)
Dust and grit
20.
How much water is used for bathing in domestic usage as per standards?
a)
20 LPCD
b)
30 LPCD
c)
55 LPCD
d)
40 LPCD
21.
Which pipe is installed when there is no pressure head available?
a)
Rising main
b)
Down take tap
c)
Soil pipe
d)
Overflow pipe
22.
Which of the following is NOT a factor affecting water demand?
a)
Temperature
b)
City population
c)
Number of valves
d)
Living standards
23.
Which term is used for waste from residences that is solid and organic in nature?
a)
Sullage
b)
Garbage
c)
Rubbish
d)
Sludge
24.
The network of sewers used for collection and disposal of sewage is called:
a)
Drainage system
b)
Sewer
c)
Sewerage
d)
Plumbing
25.
Which valve is used to clean pipelines by removing sediment?
a)
Check valve
b)
Gate valve
c)
Washout valve
d)
Pressure relief valve
26.
Which type of population forecasting assumes increasing growth rate will decrease over time?
a)
Geometric increase
b)
Arithmetic increase
c)
Incremental increase
d)
Decreasing growth rate method
27.
What component is installed to inspect and clean the sewer lines?
a)
Trap
b)
Inspection chamber
c)
Manhole
d)
Overflow pit
28.
Which type of refuse includes broken furniture, paper, and rags?
a)
Garbage
b)
Stormwater
c)
Rubbish
d)
Sludge
29.
In a distribution system, pressure at the farthest point is called:
a)
Available head
b)
Residual head
c)
Hydraulic grade
d)
Static pressure
30.
Which of the following causes back siphonage?
a)
Increase in supply pressure
b)
Sudden pressure drop
c)
Large tank overflow
d)
Pipe clogging
31.
What is the minimum recommended head for fire hydrant operation?
a)
5 m
b)
8 m
c)
12 m
d)
15 m
32.
Calculate per capita water demand if total annual demand = 365 ML and population = 10,000.
a)
100 LPCD
b)
150 LPCD
c)
365 LPCD
d)
120 LPCD
33.
Find the maximum daily demand if average demand is 160 LPCD.
a)
240 LPCD
b)
270 LPCD
c)
288 LPCD
d)
320 LPCD
34.
Which is the most offensive and foul type of sewage?
a)
Storm sewage
b)
Sullage
c)
Septic sewage
d)
Fresh sewage
35.
Which drainage term refers to less offensive wastewater from baths and kitchens?
a)
Sludge
b)
Sullage
c)
Crude sewage
d)
Combined sewage
36.
The structure allowing stormwater to flow from roads to drains is called:
a)
Benching
b)
Trap
c)
Gully
d)
Interceptor
37.
Which type of refuse is completely non-decaying and mineral in nature?
a)
Ashes
b)
Organic matter
c)
Inorganic refuse
d)
Garbage
38.
Which forecasting method uses a curved S-shape trend for population growth?
a)
Arithmetic method
b)
Graphical method
c)
Logistic curve method
d)
Incremental method
39.
What is the function of bedding in pipelines?
a)
Cover the pipe
b)
Protect from sun
c)
Support and stabilize pipe
d)
Absorb leakage
40.
Which type of water is not suitable for drinking but does not contain disease-causing organisms?
a)
Contaminated water
b)
Wholesome water
c)
Polluted water
d)
Palatable water
41.
Which structure allows treated wastewater to seep into soil?
a)
Gully trap
b)
Vent shaft
c)
Soak pit
d)
Inspection chamber
42.
Which water is defined as having pleasant taste and free from harmful impurities?
a)
Wholesome water
b)
Palatable water
c)
Contaminated water
d)
Raw water
43.
Which type of sewage is produced from households and institutions?
a)
Industrial sewage
b)
Storm sewage
c)
Domestic sewage
d)
Dilute sewage
44.
Which population forecasting method uses historical percentage increase?
a)
Arithmetic method
b)
Geometric method
c)
Incremental increase method
d)
Comparative method
45.
What component in plumbing helps remove air blocks in vertical stacks?
a)
Anti-syphonage pipe
b)
Down take pipe
c)
Vent pipe
d)
Waste pipe
46.
Which method of refuse collection ensures clean and hygienic handling?
a)
Open dumping
b)
House to house collection
c)
Incineration
d)
Landfilling
47.
Which of the following is a liquid waste product formed by combining multiple sources?
a)
Crude sewage
b)
Combined sewage
c)
Septic sewage
d)
Dilute sewage
48.
Which term refers to vertical gap between a water outlet and flood level?
a)
Air gap
b)
Residual head
c)
Available head
d)
Back pressure
49.
Which water has no treatment and is directly from a natural source?
a)
Pure water
b)
Raw water
c)
Wholesome water
d)
Contaminated water
50.
Which system is used to carry wastewater from bathrooms and kitchens?
a)
Sewer
b)
Drain
c)
Vent pipe
d)
Inspection pit
51.
Which of the following is a non-combustible refuse?
a)
Paper
b)
Tree leaves
c)
Cow dung
d)
Metal pieces
52.
What is the composition of sewage?
a)
95% solids and 5% liquid
b)
90% solids and 10% water
c)
99.9% water and 0.1% solids
d)
98% water and 2% solids
53.
Which of the following is a source of contamination in sewer pipes?
a)
Crown corrosion
b)
Sludge accumulation
c)
Exfiltration
d)
Back pressure
54.
Assertion (A): Plumbing systems must include an air gap.
Reason (R): Air gaps prevent contamination due to backflow.
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R are true but R is not the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
55.
Which of the following is used to calculate total per capita water demand?
a)
Sum of hourly usage
b)
Sum of water used in one day by entire city
c)
Yearly total water requirement ÷ (365 × Population)
d)
Average house water bill ÷ Population
56.
Which component facilitates the smooth flow of sewage at a manhole bottom?
a)
Gully trap
b)
Soak pit
c)
Benching
d)
Catch basin
57.
Which pipe component ensures vertical support in multi-storey plumbing?
a)
Branch pipe
b)
Vertical stack
c)
Cross pipe
d)
Stub pipe
58.
What is the IS code relevant to water supply design and LPCD norms?
a)
IS 1893
b)
IS 456
c)
IS 1172
d)
IS 3370
59.
What is the maximum permissible loss due to leakage and theft in water supply?
a)
10%
b)
20%
c)
25%
d)
15%
60.
Which sewage type is most commonly found in industries?
a)
Domestic sewage
b)
Storm sewage
c)
Industrial sewage
d)
Septic sewage
61.
Which term defines the topmost inner point of a sewer pipe?
a)
Crown
b)
Invert
c)
Barrel
d)
Slope
62.
Which pipe carries subsoil water?
a)
Surface drain
b)
Soil pipe
c)
Subsoil drain
d)
Vent pipe
63.
Which of the following is part of dry combustible refuse?
a)
Tree leaves
b)
Iron nails
c)
Broken tiles
d)
Glass pieces
64.
Which of the following is a common fixture in house plumbing?
a)
Sewer
b)
Water main
c)
Trap
d)
Aquifer
65.
Which water type contains minerals like Ca, Mg, Fe?
a)
Potable water
b)
Contaminated water
c)
Mineral water
d)
Wholesome water
66.
What is the minimum design pressure for fire hydrant discharge?
a)
0.8–1.0 kg/cm²
b)
1.0–1.5 kg/cm²
c)
2.0–2.5 kg/cm²
d)
0.5–1.0 kg/cm²
67.
Statement: Palatable water is safe and pleasant to drink.
Which of the following is TRUE?
a)
It is always chemically pure
b)
It contains bacteria
c)
It has offensive taste
d)
It is aesthetically acceptable
68.
Which type of trap is used to collect waste from kitchen sinks?
a)
Floor trap
b)
Gully trap
c)
Intercepting trap
d)
S-trap
69.
Which factor does not influence fire demand?
a)
Population size
b)
Storage tank size
c)
Hydrant spacing
d)
Water discharge rate
70.
Which method forecasts population using curves based on past data?
a)
Arithmetic increase method
b)
Graphical method
c)
Incremental increase method
d)
Comparative method
71.
Which structure is used in dry areas to collect water underground?
a)
Surface drain
b)
Subsoil drain
c)
Sump well
d)
Water table
72.
Which is NOT a feature of sanitary sewage?
a)
Contains domestic waste
b)
Contains industrial waste
c)
Contains storm water
d)
Requires treatment before disposal
73.
Which element is present in fire hydrant network but not in a normal water supply?
a)
Control valve
b)
Jet nozzle
c)
Taps
d)
Float valve
74.
Which population forecasting method adds past growth incrementally?
a)
Geometric method
b)
Incremental increase method
c)
Graphical method
d)
Comparative method
75.
Which of the following describes sewage that is freshly generated and not decomposed?
a)
Septic sewage
b)
Crude sewage
c)
Fresh sewage
d)
Combined sewage
76.
Which of the following pipes is directly connected to a closet or urinal?
a)
Vent pipe
b)
Waste pipe
c)
Soil pipe
d)
Subsoil pipe
77.
Which method uses a population curve to estimate future growth?
a)
Arithmetic method
b)
Graphical method
c)
Incremental method
d)
Decreasing rate method
78.
What is the standard water requirement for cooking per person per day?
a)
5 LPCD
b)
10 LPCD
c)
15 LPCD
d)
20 LPCD
79.
Which term refers to the bottom-most point inside a sewer?
a)
Crown
b)
Invert
c)
Barrel
d)
Slope
80.
Which fixture prevents foul gases from entering a building?
a)
Vent pipe
b)
Trap
c)
Drain
d)
Overflow pipe
81.
Which water demand category includes consumption in parks and street cleaning?
a)
Domestic
b)
Commercial
c)
Public use
d)
Fire demand
82.
Which structure is used to discharge excess pressure from a pipe network?
a)
Vent pipe
b)
Relief valve
c)
Gully trap
d)
Inspection chamber
83.
Which of the following systems includes drains, manholes, and pumping stations?
a)
Plumbing system
b)
Sewerage system
c)
Water distribution system
d)
Irrigation system
84.
Which method of refuse disposal is used where land is available?
a)
Open dumping
b)
Incineration
c)
Landfilling
d)
Composting
85.
Which is the correct value of fire discharge from one hydrant?
a)
800 L/min
b)
1000 L/min
c)
1100 L/min
d)
1200 L/min
86.
Which structure is used to treat domestic sewage in unsewered areas?
a)
Aeration tank
b)
Septic tank
c)
Screen chamber
d)
Grit chamber
87.
Which part of the sewer system collects waste from several sources?
a)
Lateral sewer
b)
Main sewer
c)
Branch sewer
d)
Intercepting sewer
88.
Which factor does NOT affect water consumption?
a)
Living standards
b)
Climatic conditions
c)
Population size
d)
Water colour
89.
Assertion (A): Fire demand is considered in total water supply design. Reason (R): Fire protection requires only small instantaneous flow rates.
a)
Both A and R are true and R is the correct explanation of A
b)
Both A and R are true but R is not the correct explanation of A
c)
A is true but R is false
d)
A is false but R is true
90.
Which of the following is used to reduce pressure loss in long water pipelines?
a)
Air valve
b)
Thrust block
c)
Washout valve
d)
Booster pump
91.
Which of the following is not a function of manholes?
a)
Ventilation
b)
Inspection
c)
Change of direction
d)
Backflow prevention
92.
Which of the following carries water from water mains to the building?
a)
Branch line
b)
Soil pipe
c)
Service pipe
d)
Vent pipe
93.
Which component helps prevent trap seal loss due to siphonage?
a)
Gully trap
b)
Vent pipe
c)
Anti-siphonage pipe
d)
Soil pipe
94.
Which method of sewage disposal uses land for safe absorption?
a)
Trickling filter
b)
Sewage farming
c)
Septic tank
d)
Oxidation pond
95.
Which element is not part of domestic water consumption?
a)
Flushing
b)
Washing of clothes
c)
Fire demand
d)
Drinking
96.
Which structure is primarily used for inspection and cleaning in drainage systems?
a)
Manhole
b)
Trap
c)
Gully chamber
d)
Soak pit
97.
Calculate LPCD if a city with 80,000 people uses 24 million liters daily.
a)
300 LPCD
b)
250 LPCD
c)
275 LPCD
d)
200 LPCD
98.
What is the recommended water consumption for schools (day type)?
a)
30–50 LPCD
b)
45–90 LPCD
c)
90–120 LPCD
d)
135–150 LPCD
99.
Which water category refers to untreated natural water from rivers or lakes?
a)
Wholesome water
b)
Raw water
c)
Palatable water
d)
Contaminated water
100.
Which is a preventive measure against water theft and leakage?
a)
Air valve
b)
Check valve
c)
Proper plumbing
d)
Soak pit
101.
Which of the following is designed to carry rainwater runoff from roads?
a)
Soil pipe
b)
Subsoil drain
c)
Surface drain
d)
Sewer
102.
Which structure stores water before distribution in domestic supply systems?
a)
Intake structure
b)
Sump tank
c)
Storage tank
d)
Air chamber
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