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MCQs

Total Questions : 845 | Page 9 of 85 pages
Question 81. According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is
  1.    1.25 D
  2.    1.50 D
  3.    1.75 D
  4.    2.00 D
 Discuss Question
Answer: Option D. -> 2.00 D
Question 82. The best unit duration of storm for a unit hydrograph is
  1.    1 hour
  2.    one-fourth of basin lag
  3.    one-half of basin lag
  4.    equal to basin lag
 Discuss Question
Answer: Option B. -> one-fourth of basin lag
Question 83. S-hydrograph is used to obtain unit hydrograph of
  1.    shorter duration from longer duration
  2.    longer duration from shorter duration
  3.    both (A) and (B)
  4.    none of the above
 Discuss Question
Answer: Option C. -> both (A) and (B)
Question 84. Regime conditions in a channel may occur if
  1.    Discharge is constant
  2.    Channel flows uniformly in incoherent alluvium as that transported in suspension
  3.    Silt grade and silt charge are constant
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 85. Dimensions of coefficient of transmissibility are
  1.    M°L°T°
  2.    rvfL’T”1
  3.    M° L2 T1
  4.    M’LV
 Discuss Question
Answer: Option C. -> M° L2 T1
Question 86. The ratio of the rate of change of discharge of an outlet and parent channel, is known as
  1.    Efficiency
  2.    Sensitivity
  3.    Flexibility
  4.    Modular limit
 Discuss Question
Answer: Option C. -> Flexibility
Question 87. According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is
  1.    0
  2.    unity
  3.    infinity
  4.    very large
 Discuss Question
Answer: Option C. -> infinity
Question 88. For cereal crops the most commonly adopted method of irrigation, is
  1.    Free flowing method
  2.    Check method
  3.    Furrow method
  4.    Sprinkling method
 Discuss Question
Answer: Option B. -> Check method
Question 89. For standing crops in undulating sandy fields, the best method of irrigation, is
  1.    Sprinkler irrigation
  2.    Free flooding
  3.    Check method
  4.    Furrow method
 Discuss Question
Answer: Option A. -> Sprinkler irrigation
Question 90. The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by
  1.    direct runoff volume
  2.    period of storm
  3.    total rainfall
  4.    none of the above
 Discuss Question
Answer: Option A. -> direct runoff volume

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