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MCQs

Total Questions : 824 | Page 82 of 83 pages
Question 811. Average annual rainfall at any station is the average of annual rainfall over a period of
  1.    14 years
  2.    21 years
  3.    28 years
  4.    35 years
 Discuss Question
Answer: Option D. -> 35 years
Question 812. Sluice valves are fitted in a distribution system
  1.    along straight length of pipes at suitable intervals
  2.    at the junctions of the pipes
  3.    at the branching off points of sub-mains
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 813. If pH value of water is
  1.    7 water it is said to be neutral
  2.    less than 7 it is said to be acidic
  3.    more than 7 it is said to be alkaline
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 814. For centrifugal pumps
  1.    initial cost is low
  2.    limited space is required
  3.    the discharge obtained is steady and non-pulsating
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 815. Continuous flow of water can be expected from
  1.    gravity springs
  2.    surface springs
  3.    artesian springs
  4.    none of these.
 Discuss Question
Answer: Option C. -> artesian springs
Question 816. Rapid gravity filter can only remove turbidity of water upto
  1.    15 to 25 gm/litre
  2.    25 to 30 gm/litre
  3.    30 to 35 cm/litre
  4.    35 to 40 gm/litre
 Discuss Question
Answer: Option D. -> 35 to 40 gm/litre
Question 817. Gravity conduits for carrying water from the source are
  1.    canals
  2.    flumes
  3.    acqueducts
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 818. Hardness of water is caused due to
  1.    magnesium sulphate
  2.    calcium nitrates
  3.    calcium bicarbonates
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 819. The maximum depth of sedimentation tanks is limited to
  1.    3 m
  2.    4 m
  3.    5 m
  4.    6 m.
 Discuss Question
Answer: Option D. -> 6 m.
Question 820. A high velocity of wash water is required for
  1.    rapid gravity filter with strainers
  2.    rapid gravity filter without strainers
  3.    slow sand filter with strainers
  4.    slow sand filter without strainers
 Discuss Question
Answer: Option B. -> rapid gravity filter without strainers

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