61. As compared to gravity dams, earthen dams
a) are costlier
b) are less susceptible to failure
c) require sound rock foundations
d) require less skilled labour
Ans: d
62. The most suitable material for the central impervious core of a zoned embankment type dam is
a) clay
b) coarse sand
c) silty clay
d) clay mixed with fine sand
Ans: d
63. Seepage through embankments in an earthen dam is controlled by
a) drainage filters
b) relief wells
c) drain trenches
d) provision of downstream berms
Ans: c
64. Seepage through foundation in an earthen dam is controlled by providing
a) rock toe
b) horizontal blanket
c) impervious cut off
d) chimney drain
Ans: c
65. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are
a) at right angle and parallel to weir crest
b) parallel and at right angle to weir crest
c) parallel to weir crest in both
d) at right angle to weir crest in both
Ans: a
66. The discharge passing over an ogee spillway is given by
a) CLH3/2
b) CHL3/2
c) CLH5/2
d) CLH1/2
where, L is effective length of spillway crest and H is the total head over the spillway crest including velocity head.
Ans: a
67. Coefficient of discharge of an ogee spillway
a) depends on depth of approach and upstream slope
b) depends on downstream apron interference and downstream submergence
c) remains constant
d) both (a) and (b)
Ans: d
68. Which of the following spillways is least suitable for an earthen dam ?
a) ogee spillway
b) chute spillway
c) side channel spillway
d) shaft spillway
Ans: a
69. In case of non-availability of space due to topography, the most suitable spillway is
a) straight drop spillway
b) shaft spillway
c) chute spillway
d) ogee spillway
Ans: b
70. In a chute spillway, the flow is usually
a) uniform
b) subcritical
c) critical
d) super critical
Ans: d
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a) are costlier
b) are less susceptible to failure
c) require sound rock foundations
d) require less skilled labour
Ans: d
62. The most suitable material for the central impervious core of a zoned embankment type dam is
a) clay
b) coarse sand
c) silty clay
d) clay mixed with fine sand
Ans: d
63. Seepage through embankments in an earthen dam is controlled by
a) drainage filters
b) relief wells
c) drain trenches
d) provision of downstream berms
Ans: c
64. Seepage through foundation in an earthen dam is controlled by providing
a) rock toe
b) horizontal blanket
c) impervious cut off
d) chimney drain
Ans: c
65. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are
a) at right angle and parallel to weir crest
b) parallel and at right angle to weir crest
c) parallel to weir crest in both
d) at right angle to weir crest in both
Ans: a
66. The discharge passing over an ogee spillway is given by
a) CLH3/2
b) CHL3/2
c) CLH5/2
d) CLH1/2
where, L is effective length of spillway crest and H is the total head over the spillway crest including velocity head.
Ans: a
67. Coefficient of discharge of an ogee spillway
a) depends on depth of approach and upstream slope
b) depends on downstream apron interference and downstream submergence
c) remains constant
d) both (a) and (b)
Ans: d
68. Which of the following spillways is least suitable for an earthen dam ?
a) ogee spillway
b) chute spillway
c) side channel spillway
d) shaft spillway
Ans: a
69. In case of non-availability of space due to topography, the most suitable spillway is
a) straight drop spillway
b) shaft spillway
c) chute spillway
d) ogee spillway
Ans: b
70. In a chute spillway, the flow is usually
a) uniform
b) subcritical
c) critical
d) super critical
Ans: d
More Irrigation water resources engineering Questions & Answers:-
Part1 Part2 Part3 Part4 Part5 Part6 Part7 Part8 Part9 Part10
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