Unit - 4
91. What is night soil?
a. Human excreta, animal excreta and urea
b. Animal excreta
c. Human excreta
d. Soil containing urea
92. Wastewater from different sources like bathrooms, kitchens and wash basins is called
a. Garbage
b. Sewage
c. Sullage
d. Discharge
93. Which of the following conditions is not suitable for the disposal of excreta or sewage?
a. It should be accessible for children
b. It is not exposed to the atmosphere
c. The waste does not pollute the ground surface
d. It does not give odour nuisance
94. The system to collect night soil, garbage etc. in separate vessels or deposited in pools and pits is called
a. Waste allocation system
b. Conservancy system
c. Waste deposition system
d. None of above
95. In urban cities like Bangalore, which of the water carriage system is used?
a. Partially combined system
b. Combined system
c. Separate system
d. Partially separate system
96. Which of the following is an advantage of the conservancy system over water carriage system?
a. Spread of epidemic
b. Compact house design
c. Water consumption
d. Labour force
97. The benefits of the society of managing human excreta are considerable, for public health as well as for the environment.
a. True
b. False
98. The means of promoting hygiene through the prevention of human contact with the hazards of wastes especially feces is called
a. Disease prevention
b. Hygiene
c. Sanitation
d. Hygiene control
99. The overall purpose of sanitation is to maintain the green environment alone.
a. False
b. True
100. The relatively clean wastewater from baths, sinks, washing machines and other kitchen appliances is called
a. Wastewater
b. Yellow water
c. Black water
d. Grey water
101. SORP stands for?
a. Storm Overflow Response Plan
b. Sanitary Overflow Response Plan
c. Sewage Overflow Response Plan
d. Sewer Overflow Response Plan
102. The legal entity that is responsible for the wastewater collection system is called
a. Sewer system agency
b. Water collection agency
c. Storm collection agency
d. Collection system agency
103. For which of the following reason SSMP is not used?
a. All of above
b. Minimizing sanitary sewer overflows
c. Minimizing infiltration/ inflow
d. Reducing sewer size
104. SSMPs are used to minimize the number and impact of sanitary sewer overflows that occur.
a. True
b. False
105. What is the abbreviation of SSMP?
a. Storm and Sewage Management Plan
b. Sewer System Management Plan
c. Soil and Storm Management Plan
d. Storm System Management Plan
106. The type of wastewater treatment process for treating wastewater or industrial wastewater using aeration and biological flocs is called?
a. Biological aeration
b. Aeration
c. Active sludge process
d. Anaerobic digestion
107. Which of these is the most common pipeline installation method?
a. Storm sewer construction
b. Trench sewer construction
c. Pipeline construction
d. Tunnel construction
108. The abbreviation of SUE is?
a. Surface utility engineering
b. Subsurface utility engineering
c. Storm usage engineering
d. Storm utility engineering
109. Which of the following factors mentioned below marks essential for planning sewer systems for a community?
a. Location
b. Terrain
c. Wastewater flow
d. Usage pattern
110. is required to transport storm water runoff from roofs, parking lots, streets, and highways to a point of discharge.
a. Wastewater sewers
b. Sanitary sewers
c. Storm sewers
d. Water sewers
111. Combined sewer systems are no longer installed due to the water pollution problems they present.
a. True
b. False
112. On which of the factors mentioned below, the type of the sewer installed does not depend on?
a. Usage pattern
b. storm water
c. Terrain
d. Location
113. Sewer systems can also be referred as sewerage.
a. False
b. True
114. Pipeline networks are designed by engineers and installed by sewer contractors in accordance with federal and state regulations.
a. True
b. False
115. The process that involves connecting pipelines and sewer appurtenances to transport waste to sewage treatment centres is called?
a. Sewage construction
b. Sewer construction
c. Pipelines construction
d. Connecting pipelines
116. What is the preferred class of iron pipes?
a. A
b. C
c. B
d. D
117. What is the maximum specification for water cement ratio?
a. 0.5
b. 0.4
c. 0.6
d. 0.8
118. What is the preferred size of water closet pan?
a. 25”
b. 15”
c. 10”
d. None of above
119. What is the capacity of the preferred low level flushing cistern?
a. 55 litres
b. 25 litres
c. 10 litres
d. 15 litres
120. What is the number of coats of paint required for manhole covers?
a. 4
b. 3
c. 1
d. 2
Unit - 5
121. The pressure of free ammonia in sewage, is detected by
a. Adding suphuric acid
b. Adding potassium permanganate
c. Boiling
d. Phenol-di-sulphuricacid
122. The average temperature of sewage is taken as
a. 400 C
b. 300 C
c. 200 C
d. 100 C
123. The presence of ammonia in sewage is detected by boiling.
a. False
b. True
124. The sewage treatment units in which anaerobic decomposition of organic matter is used, are called
a. None
b. Imhoff tanks
c. Sludge sedimentation tanks
d. Tricking filters
125. Dried sewage often traetment is used as
a. Building material
b. Base material for paints
c. Chemical for lowering B.O.D
d. Fertilizer
126. The coagulant widely used for sewage treatment is
a. Alum
b. Ferric chloride
c. Ferric sulphate
d. Lime
127. For the detection of nitrites in the sewage, the matching colour may be developed by adding
a. Sulphuric acid and napthamine
b. Potassium permanganate
c. Lime
d. Salt
128. The pH value of fresh sewage is usually
a. Equal to 7
b. More than 7
c. Less than 7
d. Equal to
129. The sewage treatment in septic tanks is due to
a. Parasitic decomposition
b. Aerobic decomposition
c. Anaerobic decomposition
d. None
130. In preliminary treatment of sewage the operation which takes place, is
a. Removal of fine suspended particlkes
b. Removal of fine dissolved organic material
c. Removal of harmful bacvterias and other organisms
d. Removal of lighter floating material
131. The sewage is treated by aerobicbacteria action in
a. All
b. Trickling filter
c. Trickling filter
d. Oxidation pond
132. The secodary traetment of sewage is carried out by the use of
a. Screens
b. Grit chambers
c. Chlorinators
d. Trickling filters
133. The sewage means
a. Mixture of water and waste products
b. Waste inorganic products
c. Waste organic products
d. Waste water
134. The ratio of volume of recirculated sewage to volume of the raw sewage is called recircultion ratio.
a. False
b. True
135. Removal of oil and grease from sewage, is known skinning.
a. False
b. True
136. A well oxidized sewage contains nitrogen mainly as nitrates.
a. False
b. True
137. In sewage treatment plants, the bulky floating and suspended matter is removed by screening.
a. True
b. False
138. The ratio of minimum hourly flow to the average flow of sewage is 1/3.
a. True
b. False
139. The grit chamber of a sewage plant is usually cleaned after two weeks.
a. True
b. False
140. The coagulant widely used for sewage treatment, is alum.
a. False
b. True
141. The coagulant which is generally not used for treating the sewage, is alum.
a. True
b. False
142. The bottom of the sewage inlet chamber of septic tanks, provided an outward slope 1 in 5.
a. True
b. False
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