71. For the upstream face of an earthen dam, the most adverse condition for stability of slope is
a) sudden drawdown
b) steady seepage
c) during construction
d) sloughing of slope
Ans: a
72. If there are two canals taking off from each flank of a river, then there will be
a) one divide wall and one undersluice
b) one divide wall and two undersluices
c) two divide walls and one undersluice
d) two divide walls and two undersluices
Ans: d
73. Generally the weir is aligned at right angles to the direction of the main river current because
a) it ensures less length of the weir
b) it gives better discharging capacity
c) it is economical
d) all of the above
Ans: d
74. The main function of a divide wall is to
a) control the silt entry in the canal
b) prevent river floods from entering the canal
c) separate the undersluices from weir proper
d) provide smooth flow at sufficiently low velocity
Ans: c
75. A divide wall is provided
a) at right angle to the axis of weir
b) parallel to the axis of weir and up-stream of it
c) parallel to the axis of weir and down-stream of it
d) at an inclination to the axis of weir
Ans: a
76. As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
a) lower level
b) higher level
c) same level
d) any of the above depending on the design
Ans: a
77. Silt excluders are constructed on the
a) river bed upstream of head regulator
b) river bed downstream of head regulator
c) canal bed upstream of head regulator
d) canal bed downstream of head regulator
Ans: a
78. According to Khosla's theory, the exit gradient in the absence of a downstream cutoff is
a) 0
b) unity
c) infinity
d) very large
Ans: c
79. The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by
a) 4RS
b) 11 RS
c) 7RS
d) 15 RS
Ans: b
80. The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is
a) less than 1
b) equal to 1
c) greater than 1
d) equal to zero
Ans: c
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a) sudden drawdown
b) steady seepage
c) during construction
d) sloughing of slope
Ans: a
72. If there are two canals taking off from each flank of a river, then there will be
a) one divide wall and one undersluice
b) one divide wall and two undersluices
c) two divide walls and one undersluice
d) two divide walls and two undersluices
Ans: d
73. Generally the weir is aligned at right angles to the direction of the main river current because
a) it ensures less length of the weir
b) it gives better discharging capacity
c) it is economical
d) all of the above
Ans: d
74. The main function of a divide wall is to
a) control the silt entry in the canal
b) prevent river floods from entering the canal
c) separate the undersluices from weir proper
d) provide smooth flow at sufficiently low velocity
Ans: c
75. A divide wall is provided
a) at right angle to the axis of weir
b) parallel to the axis of weir and up-stream of it
c) parallel to the axis of weir and down-stream of it
d) at an inclination to the axis of weir
Ans: a
76. As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
a) lower level
b) higher level
c) same level
d) any of the above depending on the design
Ans: a
77. Silt excluders are constructed on the
a) river bed upstream of head regulator
b) river bed downstream of head regulator
c) canal bed upstream of head regulator
d) canal bed downstream of head regulator
Ans: a
78. According to Khosla's theory, the exit gradient in the absence of a downstream cutoff is
a) 0
b) unity
c) infinity
d) very large
Ans: c
79. The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by
a) 4RS
b) 11 RS
c) 7RS
d) 15 RS
Ans: b
80. The ratio of average values of shear stresses produced on the bed and the banks of a channel due to flowing water is
a) less than 1
b) equal to 1
c) greater than 1
d) equal to zero
Ans: c
More Irrigation water resources engineering Questions & Answers:-
Part1 Part2 Part3 Part4 Part5 Part6 Part7 Part8 Part9 Part10
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