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MCQs

Total Questions : 88 | Page 8 of 9 pages
Question 71. The Froude number of a hydraulic jump is 5.5. The jump can be classified as ____________
  1.    a weak jump
  2.    an oscillating jump
  3.    rough and choppy jump
  4.    steady jump
 Discuss Question
Answer: Option D. -> steady jump
Answer: (d).steady jump
Question 72. Which of the following stilling basin is applicable to only rectangular cross-sections?
  1.    U.S.B.R stilling basin-II
  2.    U.S.B.R stilling basin-IV
  3.    U.S.B.R stilling basin-I
  4.    U.S.B.R stilling basin-III
 Discuss Question
Answer: Option B. -> U.S.B.R stilling basin-IV
Answer: (b).U.S.B.R stilling basin-IV
Question 73. In the case of dam spillways, the approaching Froude number usually lies in the range of __________
  1.    less than 2.5 m
  2.    2.5 – 4.5
  3.    4.5 – 9.0
  4.    more than 9.0
 Discuss Question
Answer: Option C. -> 4.5 – 9.0
Answer: (c).4.5 – 9.0
Question 74. _____________________ are suitable only for low spillways or weirs.
  1.    Chute blocks
  2.    Sloping aprons
  3.    Baffle wall or friction blocks
  4.    Roller buckets
 Discuss Question
Answer: Option C. -> Baffle wall or friction blocks
Answer: (c).Baffle wall or friction blocks
Question 75. In the vertical Stoney spillway gate, the rollers are placed between the ______________
  1.    gate and u/s groove guide
  2.    gate and the d/s groove guide
  3.    u/s and d/s groove guide
  4.    attached to the gate and groove guides
 Discuss Question
Answer: Option B. -> gate and the d/s groove guide
Answer: (b).gate and the d/s groove guide
Question 76. Which of the following helps in dissipating the residual energy and to reduce the length of the jump or the basin?
  1.    Dentated sills
  2.    Chute blocks
  3.    Roller bucket
  4.    Baffle piers
 Discuss Question
Answer: Option A. -> Dentated sills
Answer: (a).Dentated sills
Question 77. The spillway gate which when lowered cannot be seen from a distance is of the type ______________________
  1.    Sliding gate
  2.    Roller gate
  3.    Tainter gate
  4.    USBR drum gate
 Discuss Question
Answer: Option D. -> USBR drum gate
Answer: (d).USBR drum gate
Question 78. In a fixed roller of a spillway gate, the rollers are attached to the __________________
  1.    gate
  2.    groove gate
  3.    either gate or groove gate
  4.    guide grooves
 Discuss Question
Answer: Option A. -> gate
Answer: (a).gate
Question 79. The velocity of approach has found to be negligible effect upon discharge if ____________
  1.    the ratio H/Hd is more than 1.33
  2.    the ratio H/Hd is less than 1.33
  3.    the ratio H/Hd is equal to zero
  4.    the ratio H/Hd is more than 1
 Discuss Question
Answer: Option A. -> the ratio H/Hd is more than 1.33
Answer: (a).the ratio H/Hd is more than 1.33
Question 80. If a flood enters a dam reservoir at F.R.L, the efficiency of its ogee spillway will ______________
  1.    increase with the increasing head
  2.    reduce with the increasing head
  3.    remain constant with the increasing head
  4.    vary with the increasing head
 Discuss Question
Answer: Option A. -> increase with the increasing head
Answer: (a).increase with the increasing head

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