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MCQs

Total Questions : 366 | Page 6 of 37 pages
Question 51. . #NAME?
  1.    Clay
  2.    Sand
  3.    Silt
  4.    Coarse gravel.
 Discuss Question
Answer: Option D. -> Coarse gravel.
Question 52. .  A well is considered to be good if it is sunk into
  1.    Clay
  2.    Sand
  3.    Coarse gravel
  4.    Silt.
 Discuss Question
Answer: Option C. -> Coarse gravel
Question 53. .  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 54. .  Perched acquifers generally occur
  1.    below water table
  2.    above water table
  3.    in acquicludes
  4.    in artesian acquifers
 Discuss Question
Answer: Option B. -> above water table
Question 55. .  An aquiclude is
  1.    a non artesian aquifer
  2.    an artesian acquifer
  3.    a confined bed of impervious material bet-ween acquifers
  4.    a large water body under ground.
 Discuss Question
Answer: Option C. -> a confined bed of impervious material bet-ween acquifers
Question 56. .  Water to the consumers may be supplied from
  1.    infiltration galleries connected to sump well
  2.    infiltration well dug out on the banks of rivers
  3.    ranney wells sunk to the water level
  4.    all the above.
 Discuss Question
Answer: Option D. -> all the above.
Question 57. .  The R.L. of ground water table on the sides of a valley is 1505 m whereas R.L. of the stream water is 1475 m. If 60? slope consists of pervious soil between R.L. 1485 m to 1500 m, the gravity spring may be expected at the point of reduced level
  1.    1500 m
  2.    1505 m
  3.    1475 m
  4.    1485 in.
 Discuss Question
Answer: Option D. -> 1485 in.
Question 58. .  Pick up the incorrect statement from the following :
  1.    An impervious layer a few metres below the water table in the sub-soil, is generally called Mota layer
  2.    Mota layer is very useful to give structural support to open deep wells
  3.    A bore hole is generally provided in the mota layer for deep wells
  4.    Shallow wells a..e always of less depth as compared to deep wells '
 Discuss Question
Answer: Option D. -> Shallow wells a..e always of less depth as compared to deep wells '
Question 59. . While determining the yield of open wells by the pumping test
  1.    velocity of recharging water, increases with depression head
  2.    depression head resulting at critical velocity, is called critical depression head
  3.    working head is generally limited to ?1 rd of the critical depression head
  4.    maximum safe yield of an open ell, is expected at critical depression head.
 Discuss Question
Answer: Option D. -> maximum safe yield of an open ell, is expected at critical depression head.
Question 60. .  The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is
  1.    0.0033
  2.    0.0044
  3.    0.0055
  4.    0.0066.
 Discuss Question
Answer: Option C. -> 0.0055

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