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MCQs

Total Questions : 135 | Page 6 of 14 pages
Question 51. For rock type low filtration rate trickling filters what would be depth assumed while designing it?
  1.    1.8-2.4 m
  2.    <1.8 m
  3.    3-12.2 m
  4.    >12.2 m
 Discuss Question
Answer: Option A. -> 1.8-2.4 m
Answer: (a).1.8-2.4 m
Question 52. For rock type high filtration rate trickling filters what would be the BOD removal rate?
  1.    50-80%
  2.    50-90%
  3.    80-90%
  4.    40-70%
 Discuss Question
Answer: Option B. -> 50-90%
Answer: (b).50-90%
Question 53. For plastic type high filtration rate trickling filters what would be the BOD removal rate?
  1.    50-80%
  2.    60-90%
  3.    80-90%
  4.    40-70%
 Discuss Question
Answer: Option B. -> 60-90%
Answer: (b).60-90%
Question 54. For plastic type high filtration rate trickling filters what would be depth assumed while designing it?
  1.    1.8-2.4 m
  2.    <1.8 m
  3.    3-12.2 m
  4.    >12.2 m
 Discuss Question
Answer: Option C. -> 3-12.2 m
Answer: (c).3-12.2 m
Question 55. For rock type low filtration rate tricking filters what would be the BOD removal rate?
  1.    50-80%
  2.    50-90%
  3.    80-90%
  4.    40-70%
 Discuss Question
Answer: Option C. -> 80-90%
Answer: (c).80-90%
Question 56. What is the surface area of the River rock (Small) packing material used in trickling filters as the packing medium?
  1.    60 m²/m³
  2.    90 m²/m³
  3.    98 m²/m³
  4.    150 m²/m³
 Discuss Question
Answer: Option A. -> 60 m²/m³
Answer: (a).60 m²/m³
Question 57. What is the maximum reduced concentration of BOD obtained at the outlet of tricking filter?
  1.    40 mg/L
  2.    20 mg/L
  3.    30 mg/ L
  4.    45 mg/L
 Discuss Question
Answer: Option B. -> 20 mg/L
Answer: (b).20 mg/L
Question 58. The settling tank which is followed after the Trickling filter has which of the following characteristic?
  1.    Recirculation is present
  2.    Low suspended solids
  3.    The sludge from here is returned to the primary clarifier directly.
  4.    Has high BOD
 Discuss Question
Answer: Option B. -> Low suspended solids
Answer: (b).Low suspended solids
Question 59. High rate filtrations cannot be used for wet weather conditions.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 60. What is the surface area of the River rock (Large) packing material used in trickling filters as the packing medium?
  1.    60 m²/m³
  2.    90 m²/m³
  3.    45 m²/m³
  4.    150 m²/m³
 Discuss Question
Answer: Option C. -> 45 m²/m³
Answer: (c).45 m²/m³

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