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MCQs

Total Questions : 83 | Page 6 of 9 pages
Question 51. The line joining the static water levels in several wells excavated through a confined aquifer is known as the _____________
  1.    cone of depression
  2.    piezometric surface
  3.    perched water-table
  4.    hypsometric curve
 Discuss Question
Answer: Option B. -> piezometric surface
Answer: (b).piezometric surface
Question 52. The permeability of an aquifer (m/day) will ____________
  1.    increase with an increase in temperature of water flowing through the aquifer
  2.    decrease with an increase in temperature of water flowing through the aquifer
  3.    not get affected by the change in temperature of water flowing through the aquifer
  4.    increase up to 20°C and then decreases with the increase in the temperature of water flowing through the aquifer
 Discuss Question
Answer: Option A. -> increase with an increase in temperature of water flowing through the aquifer
Answer: (a).increase with an increase in temperature of water flowing through the aquifer
Question 53. Coefficient of storage (A) has the dimensions of _____
  1.    L³
  2.    L
  3.    L²
  4.    Dimensionless
 Discuss Question
Answer: Option D. -> Dimensionless
Answer: (d).Dimensionless
Question 54. The discharge per unit drawdown at a well is known as ___________
  1.    specific yield
  2.    specific retention
  3.    specific capacity
  4.    specific storage
 Discuss Question
Answer: Option C. -> specific capacity
Answer: (c).specific capacity
Question 55. The units of specific capacity of a well are _____
  1.    m³/sec
  2.    m²/sec
  3.    m/sec
  4.    no units
 Discuss Question
Answer: Option B. -> m²/sec
Answer: (b).m²/sec
Question 56. Open well has big diameter than tube well because ____________
i. Open well has to irrigate more area.
ii. Water contribution to the well is natural and therefore, the percolation area has to be more.
iii. Storage of water has to be made before irrigation is done.
  1.    i and ii
  2.    i and iii
  3.    ii and iii
  4.    i, ii and iii
 Discuss Question
Answer: Option C. -> ii and iii
Answer: (c).ii and iii
Question 57. Which of the following method of lifting water is very suitable when the depth of well is from 12 to 20 meters?
  1.    Denkli
  2.    Churus
  3.    Persian wheel
  4.    Windmill
 Discuss Question
Answer: Option C. -> Persian wheel
Answer: (c).Persian wheel
Question 58. Mota layer sometimes is also known as Marbarwa or Magasan is an impervious layer.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 59. If the sub-soil formation is of fine sand, the rough value of the specific yield of well per unit area of the well (K/A) given by Marriot is ____________
  1.    0.25
  2.    0.50
  3.    0.75
  4.    1.0
 Discuss Question
Answer: Option B. -> 0.50
Answer: (b).0.50
Question 60. A well is to be constructed in a fine sandy sub-soil formation. The discharge of the well under the depression head of 4 m is 0.004 m³/sec. Calculate the diameter of the well.
  1.    2 m
  2.    2.5 m
  3.    3 m
  4.    3.5 m
 Discuss Question
Answer: Option C. -> 3 m
Answer: (c).3 m

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