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MCQs

Total Questions : 366 | Page 7 of 37 pages
Question 61. .  Pick up the correct statement from thefolTowing :
  1.    The water level in a stilrw? ell, represents the ground water table level
  2.    The difference between water table level and the water level in a well after pumping, is called depression head
  3.    The surface of water table surrounding a well during pumping, forms a cone of depression
  4.    All the above.
 Discuss Question
Answer: Option D. -> All the above.
Question 62. .  Specific capacity or yield of wells, is generally ex-pressed, as
  1.    m3 per sec
  2.    m3/hour
  3.    m3/hour/m2
  4.    m3/hour/m2/m
 Discuss Question
Answer: Option D. -> m3/hour/m2/m
Question 63. .  The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is
  1.    2 m
  2.    2.25 m
  3.    2.50 m
  4.    3.00 m.
 Discuss Question
Answer: Option D. -> 3.00 m.
Question 64. .  If the specific capacity of a well is 0.3183 x le per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is
  1.    8 litres/sec
  2.    10 litres/sec
  3.    12 litres/sec
  4.    16 litres/sec.
 Discuss Question
Answer: Option D. -> 16 litres/sec.
Question 65. .  Pick up the incorrect statement from the following :
  1.    The flow in strainer type wells is radial
  2.    The flow in cavity type wells in spherical
  3.    In strainer, type wells, area of flow depend,s upon the length of the strainer pipe
  4.    In cavity type wells, area of flow depends upon the size of the cavity
 Discuss Question
Answer: Option C. -> In strainer, type wells, area of flow depend,s upon the length of the strainer pipe
Question 66. .  The most important and widely used tube well in India, is
  1.    strainer well
  2.    cavity well
  3.    slotted well
  4.    perforated pipe well.
 Discuss Question
Answer: Option A. -> strainer well
Question 67. . A strainer type well sunk through three pervious layers intervened by three impervious aquicludes, draws water from
  1.    top most pervious layer
  2.    central pervious layer
  3.    lowest pervious layer
  4.    all the pervious layers.
 Discuss Question
Answer: Option D. -> all the pervious layers.
Question 68. .  The strainer type tube well, is unsuitable for
  1.    coarse gravels
  2.    fine sandy strata
  3.    clean gravels
  4.    none of these.
 Discuss Question
Answer: Option B. -> fine sandy strata
Question 69. .  'Shrouding' is essentially provided in
  1.    strainer type wells
  2.    cavity type wells
  3.    slotted type well
  4.    all the above.
 Discuss Question
Answer: Option C. -> slotted type well
Question 70. .  Abyssinian tube well is a special type of
  1.    slotted type wells
  2.    cavity type wells
  3.    strainer type well
  4.    none of these.
 Discuss Question
Answer: Option C. -> strainer type well

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