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MCQs

Total Questions : 181 | Page 7 of 19 pages
Question 61. The area of the filter is 1500. What is the number of beds to be provided?
  1.    1
  2.    2
  3.    3
  4.    6
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 62. The slow sand filter is designed for _____________
  1.    Maximum daily demand
  2.    Maximum yearly demand
  3.    Average daily demand
  4.    Maximum weekly demand
 Discuss Question
Answer: Option A. -> Maximum daily demand
Answer: (a).Maximum daily demand
Question 63. The slow sand filter is able to remove ______ % of bacteria in water.
  1.    90
  2.    95
  3.    98-99
  4.    100
 Discuss Question
Answer: Option C. -> 98-99
Answer: (c).98-99
Question 64. The maximum daily demand of a city is 24*10⁵ and the rate of filtration is 100 per litre per hour per m². What is the area of the filter?
  1.    10
  2.    100
  3.    1000
  4.    1500
 Discuss Question
Answer: Option C. -> 1000
Answer: (c).1000
Question 65. The slow sand filter is efficient in removing turbidity of water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 66. The thickness of the base material of a rapid sand filter on which filter media are supported is __________
  1.    45-60cm
  2.    20-80cm
  3.    30-75cm
  4.    10-30cm
 Discuss Question
Answer: Option A. -> 45-60cm
Answer: (a).45-60cm
Question 67. The loss of head during cleaning operation of a rapid sand filter is __________
  1.    15-30cm
  2.    1-5cm
  3.    10-20cm
  4.    10-25cm
 Discuss Question
Answer: Option A. -> 15-30cm
Answer: (a).15-30cm
Question 68. Which device is used to supply air for the agitation of sand grains during washing of filters?
  1.    Rate control device
  2.    Tube settlers
  3.    Air compressors
  4.    Flocculator
 Discuss Question
Answer: Option C. -> Air compressors
Answer: (c).Air compressors
Question 69. In which type of under drainage system of rapid sand filter, laterals are provided with strainers?
  1.    Perforated pipe system
  2.    Pipe and strainer system
  3.    Wheeler system
  4.    Wagner system
 Discuss Question
Answer: Option B. -> Pipe and strainer system
Answer: (b).Pipe and strainer system
Question 70. The thickness of the suspended matter on top of the sand bed is __________
  1.    Directly proportional to head loss
  2.    Inversely proportional to head loss
  3.    Independent of the head loss
  4.    Directly proportional to the square of head loss
 Discuss Question
Answer: Option A. -> Directly proportional to head loss
Answer: (a).Directly proportional to head loss

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