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MCQs

Total Questions : 1556 | Page 11 of 156 pages
Question 101. The arrangement made for passing the sewer line below an obstruction below the hydraulic gradient lines called
  1.    Inverted syphon
  2.    Depressed sewer
  3.    Sag pipe
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 102. No treatment of the sewage is given if dilution factor is
  1.    Less than 150
  2.    Between 150 to 200
  3.    Between 200 to 300
  4.    More than 500
 Discuss Question
Answer: Option D. -> More than 500
Question 103. In septic tanks,
  1.    Free board of 0.3 m may be provided
  2.    The baffles or tees are extended up to top level of scum
  3.    The clear space between the baffle top and covering slab is about 7.5 cm
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 104. The maximum diameter of sewers adopted in the designs is
  1.    1.0 m
  2.    2.0 m
  3.    3.0 m
  4.    4.0 m
 Discuss Question
Answer: Option C. -> 3.0 m
Question 105. Which one of the following part of human body withstands minimum radiation?
  1.    Thyroid
  2.    Kidneys
  3.    Eyes
  4.    Ovaries/testis
 Discuss Question
Answer: Option D. -> Ovaries/testis
Question 106. In a sludge tank, the gas mainly produced, is
  1.    Oxygen
  2.    Nitrogen
  3.    Hydrogen
  4.    Carbon dioxide
 Discuss Question
Answer: Option D. -> Carbon dioxide
Question 107. A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is
  1.    100
  2.    1000
  3.    5000
  4.    10000
 Discuss Question
Answer: Option D. -> 10000
Question 108. The gas which may cause explosion in sewers, is
  1.    Carbondioxide
  2.    Methane
  3.    Ammonia
  4.    Carbon monoxide
 Discuss Question
Answer: Option B. -> Methane
Question 109. Sludge banks are formed if sewage is disposed of in
  1.    Rivers
  2.    Seas
  3.    Lakes
  4.    None of these
 Discuss Question
Answer: Option B. -> Seas
Question 110. The rate of accumulation of sludge in septic tanks is recommended as
  1.    30 litres/person/year
  2.    25 litres/person/year
  3.    30 litres/person/month
  4.    25 litres/person/month
 Discuss Question
Answer: Option A. -> 30 litres/person/year

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