☰ Solid Waste and Waste Water Treatment (Civil Engineering) - MCQs

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Q19.

The maximum efficiency of BOD removal is achieved in :

  • A. oxidation pond
  • B. oxidation ditch
  • C. aerated lagoons
  • D. trickling filters
    ✍ Discuss    
Q20.

In facultative stabilization pond, the sewage is treated by :

  • A. aerbic bacteria only
  • B. dual only
  • C. dual action of aerobic bacteria and anaerobic bacteria
  • D. sedimentation
    ✍ Discuss    
Q21.

Sludge volume index is defined as the ratio of :

  • A. percentage of sludge by volume to percentage of suspended solids by weight
  • B. percentage of sludge by volume to percentage of total solids by weight
  • C. percentage of suspended solids by weight to percentage of sludge by volume
  • D. percentage of total solids by weight to percentage of sludge by volume
    ✍ Discuss    
Q22.

Sewage sickness relates to :

  • A. toxicity of sewage interfering with response to treatment
  • B. reduction in the waste purifying capacity ot the soil
  • C. destruction of aquatic flora and fauna due to gross pollution of receiving bodies of water by sewage
  • D. clogging of proes in soil due of excessive application of sewage to land, obstructing aeration and lending to septic conditions
    ✍ Discuss    
Q23.

which of the following sewage treatment methods has inherent problems of odour,ponding and fly nuisance :

  • A. UASB system
  • B. Activated sludge process
  • C. Trickling filters
  • D. Stabilization ponds
    ✍ Discuss    
Q24.

Total volatile suspended solids to be anaerobically digested (kg/d VSS ) shall be :

  • A. 133
  • B. 168
  • C. 233
  • D. 245
    ✍ Discuss    
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