1. Objectives of Internal Water Supply and
Sanitary Drainage Systems:
(a) Remove
effluent quickly & quietly
(b) Free
from blockage, durable and economic
(c)
Expected to last as long as the building
(d) All of the above
2. Common types of Sanitary appliances:
(a) Water
closets (W.C.), urinal, bidets
(b) Shower
and bath
(c) Sink,
cleaner’s sink
(d) All of
the above
3. Materials
Used for Sanitary appliances:
(a) Glazed stoneware
(b)Ceramics
(c) Wood
(d) Both a
and b
4.Proper slope of a basin Waste pipe to avoid self siphon age:
(a) 20 mm/m
(b) 15 mm/m
(c) 25 mm/m
(d) 10 mm/m
5. Loss of water seal is related to:
(a) Self-siphon age
(b)
Compression or back pressure
(c) Both a and b
(d)
None of the above
6. Self-siphon
age is caused by:
(a) A moving plug of water in the
waste pipe
(b) Avoided by
placing restrictions on lengths and gradients and venting long or steep
gradients.
(c) Both a and b
(d)
None of the above
7. Induced siphon age is caused by:
(a)Caused: discharge from one trap.
(b)Overcame: design of the pipe diameters, junction layouts and
venting arrangements.
(c)Both a and b
(d)None of
the above
8. Gusts of wind blowing across the top of a
stack.
(a) Wavering Out
(b)
Evaporation
(c)
Capillary Action
(d)
Compression or Back Pressure
9. An underground drain that is allowed to run
full causes large pressure fluctuations.
(a)
Evaporation
(b) Surcharging
(c)
Intercepting Traps
(d)
Leakage
10. Where a single-stack system is
connected into a drain with an interceptor trap nearby, fluid flow is
restricted. Additional stack ventilated is used, known as:
(a) Intercepting Traps
(b) Bends
and Offsets
(c) Both a and b
(d) None
of the above
11. …………….
can occur through mechanical failure of the joints or the use of a material not
suited to the water conditions.
(a)
Surcharging
(b)
Evaporation
(c) Leakage
(d)
Capillary Action
12. Examples
of anti-siphon traps are:
(a) McAlpine
trap
(b)Grevak
trap
(c)
Econa trap
(d) All of the above
13. Minimum Depth of Water Seal for bath &
showers;
(a) 35 mm
(b) 40 mm
(c) 45 mm
(d) 50 mm
14. Minimum
Depth of Water Seal for wash basins:
(a) 35 mm
(b) 40 mm
(c) 45 mm
(d) 50 mm
15. Rule of thumb for vertical stack:
(a)100 mm
diameter: up to 750 discharge units
(b)125 mm
diameter: up to 2500 discharge units
(c)150 mm
diameter: up to 5500 discharge units
(d) All of the above
16.
Materials for Sanitary Pipe Work:
(a) Cast
iron
(b)
Galvanized steel
(c) Copper
(d) All of the above
17. Types of sanitary drainage systems:
(a) Single
stack system
(b) Collar
boss system
(c) Both a and b
(d) None
of the above
18. Vertical stack at 200 mm below the centre
of the WC branch connection.
(a) Single stack system
(b) Collar
boss system
(c) Both a and b
(d) None
of the above
19. The slopes of the branch pipes are: sink
and bath, 18 to 19 mm/m; basin 20-120 mm/m; WC 18 mm/m (min.).
(a) Single stack system
(b) Collar
boss system
(c) Both a and b
(d) None
of the above
20. Loop vent pipe on the basin trap
prevent its siphonage when the bath is discharged.
(a) Single
stack system
(b) Collar boss system
(c) Both
a and b
(d) None
of the above
21. To prevent the loss of trap water
sealsà WC branch pipe min. 100 mm bore and
the angle θ = 90.5° to 95°.
(a) Single
stack system
(b) Collar
boss system
(c) Modified
Single Stack System
(d) None
of the above
22. The most expensive and in case
with widely spaced sanitary appliances.
(a) Single
stack system
(b) Collar
boss system
(c) Modified
Single Stack System
(d) Two-pipe System
23. Water must pass a ………………before
discharging out:
(a) Sump pit
(b) Petrol
Interceptor
(c) Grease trap
(d) All of
the above
24. Storm-water or rainwater drainage
is designed for:
(a)Roofs
(b)
gutters
(c) ground
drainage
(d) All of the above
25. Rainfall intensity, mm/hr taken as
………………..mm/hr:
(a) 50
(b) 75
(c) 100
(d) 125
26. Ground Impermeability Factor for
road pavement:
(a) 0.9
(b) 0.95
(c) 0.75
(d) 0.70
27. Ground Impermeability Factor for
Roof:
(a) 0.9
(b) 0.95
(c) 0.75
(d) 0.70
28. Ground Impermeability Factor for
Parks or Garden:
(a) 0.9
(b) 0.95
(c) 0.75
(d) 0.25
29. is
known as:
(a) Drain
Water Flow Rate
(b) Size
of Rain Water Outlet
(c) Chezy Formula
(d) None
of the above
 |
30. is
known as:
(a) Drain
Water Flow Rate
(b) Size
of Rain Water Outlet
(c) Chezy
Formula
(d) Crimp and Bruges Formula
31. Two sets of drains………………………
(a) increases the cost of building
drainage.
(b)decrease
the cost of building drainage.
(c) always
feasible & recommended to provide
(d)
decrease the efficiency of drainage
32. Which
one of the following is best related to separate drainage system:
(a) Foul
air passing through an unsealed rainwater gully trap
(b) Sewage
disposal plant is much smaller
(c) The cost of sewage purification is less
(d) All of the above
33. Which
one of the following is best related to combined drainage system:
(a) Greater
cost of the sewage disposal
(b) No
risk of making a wrong connection
(c) Foul
water flushed through the drain by the surface water
(d) All of the above
34. The branch of public
health engineering healing with collection, conveyance and disposal of wastage
(garbage, sullage, sewage).
(a) Sewerage
& Sanitary Engineering
(b) Sewerage Engineering
(c) Sanitary Engineering
(d) All of the above
35. The sewage from residential buildings business centers,
institutions, etc. this also contain human body waste (feaces & urine) and
also sullage water.
(a) Sanitary Sewage
(b) Domestic Sewage
(c) Industrial Sewage
(d) Both a
& b
36. …………….. is that part of surface run off which is flowing in
sewer during the rainfall.
(a) Storm
Sewage
(b) Sanitary Sewage
(c) Sullage
(d) Both b & c
37. ………… the waste water resulting from personal wasting, bathing,
laundry, food preparation and cleaning of utensils.
(a) Storm Sewage
(b) Sanitary Sewage
(c) Sullage
(d) Both b & c
38. …………… is used for dry refuse of town containing organic,
inorganic solids, semisolids, combustible, noncombustible, and putrecible and
non-putrecible substances.
(a) Garbage
(b) Sanitary Sewage
(c) Sullage
(d) Both b & c
39………………. is the water which has leaked into the sewer from the
ground.
(a) Infiltration
(b)
Exfiltration
(c)
Both a & b
(d)
None of the above
40. ……………………. is the water entering the sewer from surface source
through manholes, open cleanouts, perforated manhole cross, and root drain of
basement sumps connected to the sewers inflow occurs only during runoff.
(a)
Infiltration
(b)
Exfiltration
(c) inflow
(d)
Both a & c
41………………… is a pipe or conduit carrying sewage, sewage are usually
not flowing full (gravity flow). The full flowing sewers are called fore main
as the flow is under pressure.
(a) Sewer
(b)
Sewage
(c)
None of them
(d)
Both a & b
42. There are …………….. types of sewers.
(a) 3
(b)
2
(c)
1
(d)
4
43……………….. sewer carrying sanitary and industrial sewage excluding
storm sewage. It is also some time called separate sewer.
(a)
Continued Sewer
(b) Storm Sewer
(c) Sanitary
Sewer
(d) None of them
44. …………..one which carried storm sewage including surface runoff
and street wash.
(a)
Continued Sewer
(b) Storm
Sewer
(c) Sanitary Sewer
(d) None of them
45. …………………. is the one carrying domestic, industrial and storm
sewage all together.
(a) Continued Sewer
(b) Storm Sewer
(c) Sanitary Sewer
(d) None of them
46…………………. the science and art of collecting, treating and
disposing of sewage. There are three systems of sewerage.
(a)
Sewer
(b) Sewage
(c)
None of them
(d)
Both a & b
47. ....................is
the system
the sanitary sewerage and storm water are carried separately in two sets of
sewers.
(a) Separate system
(b) Combined system
(c) Partially Combined system
(d) None of them
48. When pumping is required, the
system process to be economical. It is best related to:
(a) Separate system
(b) Combined system
(c) Partially Combined system
(d) None of them
49. In this system the sewage and
storm water are carried all together in only one set of sewers to the
wastewater treatment plant before disposal.
(a)
Separate system
(b) Combined
system
(c) Partially Combined system
(d) None of them
50. It is easy to clean combine sewers
because of large size. It is best related to:
(a)
Separate system
(b) Combined
system
(c) Partially Combined system
(d) None of them
51. The sewage and storm water of
building are carried by one set of sewers while storm water from roads,
streets, pavements, etc are carried by other system of sewers usually open
drains.
(a)
Separate system
(b) Combined system
(c) Partially
Combined system
(d) None of them
52. The setting is avoided due to
entry of storm water. It is best related to:
(a)
Separate system
(b) Combined system
(c) Partially
Combined system
(d) None of them
53. Method of Disposal of Sewage:
(a) Conservancy System /
Method or (dry system)
(b)Water Carriage
System / method
(c) All of
the above
(d) Both a & b
54. ……………..
System also called dry system. Different types of wastes / refuses are
collected separately and disposed off.
(a) Conservancy System / Method or (dry system)
(b)Water Carriage
System / method
(c) All of
the above
(d) Both a
& b
55. The
sludge & storm water are conveyed separately by close and open channel and
discharge into natural streams………..
(a) Conservancy System / Method or (dry system)
(b)Water Carriage
System / method
(c) All of
the above
(d) Both a
& b
56.
Draw
backs of dry system:
(a) In
sanitary Condition
(b) Labor
problems
(c)Land
requirement
(d) All of the above
57. In this system water is used as a
medium to carry wastes to the point of final disposal. The quantity of water is
so large (99.9%) that the waste becomes a liquid which is carried by sewers.
(a) Conservancy System /
Method or (dry system)
(b)Water
Carriage System / method
(c) All of
the above
(d) Both a
& b
58. It receives discharge
from house sewers.
(a)Sub Main Sewer
(b)House Sewer
(c)Lateral
Sewer
(d)Main / Trunk Sewer
59. It receive discharge
from one or more laterals:
(a)Sub Main
Sewer
(b)House Sewer
(c)Lateral Sewer
(d)Main / Trunk Sewer
60. Receive discharge from
two or more sub mains:
(a)Sub Main Sewer
(b)House Sewer
(c)Lateral Sewer
(d)Main /
Trunk Sewer
61. Pipe conveying sewage
from plumbing system of a building to common / municipal sewer.
(a)Sub Main Sewer
(b)House
Sewer
(c)Lateral Sewer
(d)Main / Trunk Sewer
62. Receive discharge from all collecting system and
convey it to the point of final disposal (e.g. a water body etc.)
(a)Sub Main Sewer
(b)House Sewer
(c)Lateral Sewer
(d)Outfall
sewer
63. Period of design is
“Indefinite” as the system is designed to cater for the maximum development of
the area.
(a) Treatment
Works
(b)Disposal
works
(c)Collection Works
(d) All of
the above
64. Design period is usually 10 years. Rates of flow required are: average
daily, peak and maximum flow rated, including infiltration.
(a) Treatment
Works
(b)Disposal works
(c)Collection
Works
(d) All of
the above
65. Design period is 15 to 20 years. Flow rate required are average and peak
rates both including infiltration.
(a) Treatment Works
(b)Disposal
works
(c)Collection
Works
(d) All of
the above
66. ………………………….= G.L – Cover
over pipe – thickness of pipe – diameter of pipe
(a) Invert
Level
(b) Bench Mark
(c) Station level
(d) None of them
67. M = 1 + 14 / (4 + √P)
(a) Drain
Water Flow Rate
(b) Size
of Rain Water Outlet
(c) Peak factor Formula
(d) Crimp
and Bruges Formula
68. V = l / n (R) 2/3
√S
(a) Manning's formula
(b) Size
of Rain Water Outlet
(c) Peak
factor Formula
(d) Crimp
and Bruges Formula
69. C = (41.66 + 1.811/n + 0.00281/S)
(a) Manning's formula
(b) Kutter’s Formula
(c) Peak
factor Formula
(d) Crimp
and Bruges Formula
70. The purpose of ...............is to remove large
particles of floating or suspended matter so that the pump is not clogged or
damaged.
(a) Bar
Screens
(b)Screens
(c)Primary
Treatment
(d)
Secondary Treatment
71. Remove
suspended, settle able and floating matters.
(a) Bar
Screens
(b)Screens
(c)Primary Treatment
(d)
Secondary Treatment
72. Primary Sedimentation Tank is
designed on the basis of:
(a) AVERAGE FLOW
(b) MAX.
FLOW
(c) MIN.
FLOW
(d) TOTAL
FLOW
73. A treatment process in which bacteria are kept
in suspension by constantly aerating the wastewater e.g. activated sludge
process, Aerated Lagoons etc.
(a) Bar
Screens
(b) Suspended Growth Process
(c)Primary
Treatment
(d)
Secondary Treatment
74. Excessive carry over of flocs in the effluent
resulting in inefficient operation to find clarifier in referred as............
(a) Bar
Screens
(b) Sludge Bulking
(c)Primary
Treatment
(d)
Secondary Treatment
75. Aeration Devices are:
(a) mechanical
aeration
(b) diffused
aeration
(c)
electrical aeration
(d) Both a & b
76…………………………. utilize a
relatively porous bacteria growth medium like ROCK or FORMED PLASTIC SHAPES.
(a) Bar
Screens
(b) Trickling filter
(c)Primary
filters
(d)
Secondary filters
77. Wastewater is applied to the surface and percolates through the filter,
flowing over the biological growth in a thin film in a process named as:
(a) Bar
Screens
(b) Trickling filter
(c)Primary
filters
(d) Secondary
filters
78. Types of Trickling
Filters:
(a)Low rate
(b)High rate (mostly used
these days)
(c)Both a
& b
(d)All of the above
79………………………… provide a useful method of Wastewater treatment and disposal for
growing communities where both FUNDS and TRAINED PERSONNEL are in short supply.
(a) Waste Water Stabilization Ponds (WSP)
(b) Sludge
Bulking
(c) Primary
Treatment
(d) Secondary
Treatment
80. WSP are best solution where:
(a) Financial resources are limited
(b) Technical expedite are lacking
(c) Sufficient land area is available at cheap cost.
(d)All of the above
81. Le / Li=1/ (1 + Kt)
(a) Manning's formula
(b) Formula for effluent quality
(c) Peak
factor Formula
(d) Crimp
and Bruges Formula
82. S.L=I5T – 50
(a) Manning's formula
(b) Mara Formula far BOD Loading
(c) Peak
factor Formula
(d) Crimp
and Bruges Formula
83. Maturation Ponds are used for:
(a)Polishing of Effluent
(b)Removal of Pathogens
(c) Both a
& b
(d) None
of them
84. Application of Maturation Ponds
include:
(a)Primarily used for reduction of PATHOGENS
(b)Removal of organic matter (BOD)
(c) Both a
& b
(d) None
of them
85. ……………………is a basin in which wastewater is treated on a FLOW THROUGH BASIS.
(a) Bar
Screens
(b) Aerated Lagoons
(c)Primary
filters
(d)
Secondary filters
86. Purpose of Sludge Digestion
include:
(a) To reduce the sludge volume for disposal
(b) To reduce the water content of sludge for easy handling
(c) To recover valuable GAS
(d) All of the above
87. Moisture content of primary
sedimentation sludge tank ( raw sludge) is:
(a) 94 – 96 %
(b) 98.5 – 99.5 %
(c) 88 – 94 %
(d) 94 – 96 %
88. Moisture content of activated
sludge tank ( raw sludge) is
(a) 94 – 96 %
(b) 98.5 – 99.5 %
(c) 88 – 94 %
(d) 94 – 96 %
89. Under anaerobic
conditions, sludge digestion occurs through the action of groups of bacteria; that
(a) Methane
Forming Bacteria
(b) Acid
Forming Bacteria
(c) Ethane
forming Bacteria
(d) Both a & b
90………………………… convert
complex organic substances like
fats, carbohydrates, proteins etc. present in the sludge into simple organic compounds and fatty acids.
(a) Methane
Forming Bacteria
(b) Acid Forming Bacteria
(c) Ethane
forming Bacteria
(d) Both a
& b
91. ..............................
form CH4 and CO2 by using acid and NH3 and
other products of the first group. They get best in the pH range of 6.5 to 8
and more précising within pH rage of 7.2–7.4.
(a) Methane Forming Bacteria
(b) Acid
Forming Bacteria
(c) Ethane
forming Bacteria
(d) Both a
& b
92. Digester tanks are
usually ...............................deep.
(a) 6m to 15m
(b) 7m to 14m
(c) 8m to 16m
(d) 10m to 20m
93. Diameter of the
digester may vary from ...................depending upon the capacity.
(a) 6m to 40m
(b) 7m to 14m
(c) 8m to 16m
(d) 10m to 20m
94. The purpose of .........................is to dewatered digested sludge
and to further reduce its volume.
(a) sludge drying beds
(b) Aerated Lagoons
(c)Primary
filters
(d)
Secondary filters
95. Design requirements of sludge drying beds include:
(a) Area requirement à 0.2 m2 / person
(b) Common dimensionsà 10m x 40m
(c) Minimum no. of units à 2
(d) All of the
above.
96. Design Parameters
for Septic Tank:
(a) Detention Time à 24 – 48 hr
(b)
L: W Ã 3: 1
(c)
Depth à 1 – 1.5 m
(d) All of the
above.
97. In the absence of
any sewage collection system, the effluent from septic tank can be disposed in
a........................
(a)
Soakage Pit.
(b) Aerated Lagoons
(c)Primary
filters
(d) Secondary filters
98. Design Parameters of Soakage Pit.
(a) Bottom above water table = at least 10’
(b) Away from wells = at least 50’
(c) Diameter = 6 ‘– 12’
(d) All of the
above.
99. “Whenever there is a planned activity, it will cause some impacts /
effects on the environment, the assessment of these impacts is called
....................”
(a) Environmental impact assessment
(b) Environmental Engineering assessment
(c) Environmental Consultation
(d) None of the above.
100. ...................................Refers to flora and fauna of the
area, including a specified of trees, gasses, fish, birds. Specific reference
should be made to endangered plants and animals.
(a) Cultural Environment
(b) Biological Environment
(c) Physical Environment
(d) None of the above.
