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MCQs

Total Questions : 845 | Page 8 of 85 pages
Question 71. Cyclonic precipitation is caused by lifting of an air mass due to
  1.    pressure difference
  2.    temperature difference
  3.    natural topographical barriers
  4.    all of the above
 Discuss Question
Answer: Option A. -> pressure difference
Question 72. Which one of the following statements is correct?
  1.    The canal system and the drainage system are complementary
  2.    The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land
  3.    The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 73. If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor downstream of the crest-wall, is given by the equation
  1.    t = (h + 1)/(G + t)
  2.    t = (h - 1)/(G + t)
  3.    t = (h - 1)/(G - t)
  4.    t = (h + 1)/G
 Discuss Question
Answer: Option C. -> t = (h - 1)/(G - t)
Question 74. Side slopes generally kept for canals in loam soil, are:
  1.    1 : 1 in cutting and 1½ : 1 in filling
  2.    1½ : 1 in cutting and 2 : 1 in filling
  3.    Neither (A) nor (B)
  4.    Both (A) and (B)
 Discuss Question
Answer: Option D. -> Both (A) and (B)
Question 75. If the R.L’s of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be
  1.    aqueduct
  2.    superpassage
  3.    syphon
  4.    syphon aqueduct
 Discuss Question
Answer: Option C. -> syphon
Question 76. The most suitable location of a canal head work, is
  1.    Boulders stage of the river
  2.    Delta stage of the river
  3.    Rock stage of the river
  4.    Trough stage of the river
 Discuss Question
Answer: Option D. -> Trough stage of the river
Question 77. Process of meandering is due to
  1.    Sediment load of streams
  2.    Discharge and hydraulic properties of streams
  3.    Relative erodibility of the bed and banks
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 78. Cross regulators in main canals are provided
  1.    To regulate water supply in the distributaries
  2.    To increase water head upstream when a main canal is running with low supplies
  3.    To overflow excessive flow water
  4.    None of these
 Discuss Question
Answer: Option B. -> To increase water head upstream when a main canal is running with low supplies
Question 79. The aqueduct or superpassage type of works are generally used when
  1.    high flood drainage discharge is small
  2.    high flood drainage discharge is large and short lived
  3.    high flood drainage discharge is large and continues for a long time
  4.    none of the above
 Discuss Question
Answer: Option A. -> high flood drainage discharge is small
Question 80. The most suitable chemical which can be applied to the water surface for reducing evaporation is
  1.    Methyl alcohol
  2.    Ethyl alcohol
  3.    Cetyl alcohol
  4.    Butyl alcohol
 Discuss Question
Answer: Option C. -> Cetyl alcohol

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