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MCQs

Total Questions : 1556 | Page 18 of 156 pages
Question 171. Dry water flow in a combined sewer, is
  1.    Industrial sewage
  2.    Domestic sewage
  3.    Storm water
  4.    Inclusive of domestic and industrial sewage but excludes storm water
 Discuss Question
Answer: Option D. -> Inclusive of domestic and industrial sewage but excludes storm water
Question 172. A sewer running partially full and hurried with back filled, fails in compression due to
  1.    Weight of the pipe
  2.    Weight of the back fill
  3.    Superimposed traffic loads
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 173. The ratio of design discharge to the surface area of a sedimentation tank is called
  1.    Surface loading
  2.    Overflow rate
  3.    Overflow velocity
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 174. The maximum depth of sedimentation tanks, is kept
  1.    3 m
  2.    3.5 m
  3.    4 m
  4.    4.5 m
 Discuss Question
Answer: Option A. -> 3 m
Question 175. Chlorination of water is done for the removal of
  1.    Bacterias
  2.    Suspended solids
  3.    Sediments
  4.    Hardness
 Discuss Question
Answer: Option A. -> Bacterias
Question 176. Depletion of ozone layer in the outer atmosphere may cause
  1.    Lung cancer
  2.    Skin cancer
  3.    Bronchitis
  4.    Heart disorder
 Discuss Question
Answer: Option B. -> Skin cancer
Question 177. For treating the sewage of a large city, you will recommend
  1.    A sedimentation tank and an activated sludge treatment plant
  2.    A plant consisting of Imhoff tanks with low rate trickling filters
  3.    Sedimentation tanks with high rate trickling filters
  4.    None of these
 Discuss Question
Answer: Option A. -> A sedimentation tank and an activated sludge treatment plant
Question 178. In sewers the effect of scouring is more on
  1.    Top side
  2.    Bottom side
  3.    Horizontal side
  4.    All sides
 Discuss Question
Answer: Option B. -> Bottom side
Question 179. For estimating the peak run off the rational formula Q = 0.0278 KpA was evolved by
  1.    Kinchling
  2.    Lloyd Davis
  3.    Frubling
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 180. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is
  1.    0.05552 cumec
  2.    0.05554 cumec
  3.    0.05556 cumec
  4.    0.0556 cumec
 Discuss Question
Answer: Option C. -> 0.05556 cumec

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