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Total Questions : 1556 | Page 14 of 156 pages
Question 131. The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is
  1.    1.5
  2.    2.0
  3.    3.0
  4.    4.0
 Discuss Question
Answer: Option B. -> 2.0
Question 132. The sewerage system originates from
  1.    House sewers
  2.    Lateral sewers
  3.    Branch sewers
  4.    Main sewers
 Discuss Question
Answer: Option A. -> House sewers
Question 133. The digested sludge from septic tanks, is removed after a maximum period of
  1.    3 years
  2.    3.5 years
  3.    4 years
  4.    5 years
 Discuss Question
Answer: Option A. -> 3 years
Question 134. The underground sewers are more subjected to
  1.    Tensile force
  2.    Compressive force
  3.    Bending force
  4.    Shearing force
 Discuss Question
Answer: Option B. -> Compressive force
Question 135. The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by
  1.    Bazin
  2.    Crimp and Bruges
  3.    William-Hazen
  4.    Kutter
 Discuss Question
Answer: Option B. -> Crimp and Bruges
Question 136. ¾th or ¼th extra space is left in sewer pipes at maximum discharge for
  1.    Low estimates of the average and maximum flows
  2.    Large scale infiltration of storm water
  3.    Unexpected increase in population
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 137. Kjeldahl nitrogen is a mixture of
  1.    Ammonia and nitrogen
  2.    Nitrogen and organic nitrogen
  3.    Organic nitrogen and ammonia
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 138. In detritus tanks,
  1.    Flow velocity is kept 0.09 m/sec
  2.    Detention period is kept 3 to 4 minutes
  3.    Organic and inorganic materials are separated
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 139. The intensity of rain is expressed in
  1.    cm/minute
  2.    cm/hour
  3.    cm/day
  4.    None of these
 Discuss Question
Answer: Option B. -> cm/hour
Question 140. For sewers, inverted siphon is provided for
  1.    One pipe
  2.    Two pipes
  3.    Three pipes
  4.    Four pipes
 Discuss Question
Answer: Option C. -> Three pipes

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