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
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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 à 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.
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