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MCQs

Total Questions : 1556 | Page 9 of 156 pages
Question 81. In a fully mechanised composting plant, involves
  1.    Mechanized receipt
  2.    Mechanized segregation
  3.    Mechanized pulverising of refuse
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 82. For drainage pipes in buildings the test applied before putting them to use, is
  1.    Water test
  2.    Smoke test
  3.    Straightness test
  4.    All the above
 Discuss Question
Answer: Option B. -> Smoke test
Question 83. During purification process of sewage the gas given off, is
  1.    Carbon dioxide
  2.    Hydrogen
  3.    Ammonia
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 84. Antisyphonage pipe is fitted
  1.    At the end of septic tanks
  2.    On manholes
  3.    With a W.'trap
  4.    At the beginning of sewer line
 Discuss Question
Answer: Option C. -> With a W.'trap
Question 85. The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is
  1.    d² (0.011d + 0.785H)/Q
  2.    d (0.022d + 0.085H)/Q
  3.    d (0.785d + 0.011H)/Q
  4.    d (0.285d + 0.011H)/Q
 Discuss Question
Answer: Option A. -> d² (0.011d + 0.785H)/Q
Question 86. The water carried sewerage system removes
  1.    Domestic sewage
  2.    Industrial sewage
  3.    Storm sewage
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 87. For the survival of fish in a river stream, the minimum dissolved oxygen is prescribed
  1.    3 ppm
  2.    4 ppm
  3.    5 ppm
  4.    10 ppm
 Discuss Question
Answer: Option B. -> 4 ppm
Question 88. House connections to the laterals is generally made by
  1.    R.C.C.
  2.    P.C.C.
  3.    Cast iron
  4.    Glazed stonewares
 Discuss Question
Answer: Option D. -> Glazed stonewares
Question 89. The self-cleansing velocity of water flowing through pipe lines, is
  1.    2 metres/sec
  2.    1 metre/sec
  3.    0.5 metre/sec
  4.    0.25 metre/sec
 Discuss Question
Answer: Option A. -> 2 metres/sec
Question 90. Rate of flow of sewage is generally assumed
  1.    More than the rate of water supply
  2.    Equal to the rate of water supply
  3.    Less than the rate of water supply
  4.    At 150 litres per capita
 Discuss Question
Answer: Option D. -> At 150 litres per capita

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